文档章节

iOS 知识-常用小技巧大杂烩

冰泪_
 冰泪_
发布于 2016/05/26 13:10
字数 6027
阅读 58
收藏 0

1. 打印View所有子视图

po [[self view]recursiveDescription]

2. layoutSubviews调用的调用时机

* 当视图第一次显示的时候会被调用
* 当这个视图显示到屏幕上了,点击按钮
* 添加子视图也会调用这个方法
* 当本视图的大小发生改变的时候是会调用的
* 当子视图的frame发生改变的时候是会调用的
* 当删除子视图的时候是会调用的

3. NSString过滤特殊字符

// 定义一个特殊字符的集合
NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:
@"@/:;()¥「」"、[]{}#%-*+=_\\|~<>$€^•'@#$%^&*()_+'\""];
// 过滤字符串的特殊字符
NSString *newString = [trimString stringByTrimmingCharactersInSet:set];

4. TransForm属性

//平移按钮
CGAffineTransform transForm = self.buttonView.transform;
self.buttonView.transform = CGAffineTransformTranslate(transForm, 10, 0);

//旋转按钮
CGAffineTransform transForm = self.buttonView.transform;
self.buttonView.transform = CGAffineTransformRotate(transForm, M_PI_4);

//缩放按钮
self.buttonView.transform = CGAffineTransformScale(transForm, 1.2, 1.2);

//初始化复位
self.buttonView.transform = CGAffineTransformIdentity;

5. 去掉分割线多余15像素

首先在viewDidLoad方法加入以下代码:
 if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)]) {
        [self.tableView setSeparatorInset:UIEdgeInsetsZero];    
}   
 if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) {        
        [self.tableView setLayoutMargins:UIEdgeInsetsZero];
}
然后在重写willDisplayCell方法
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell 
forRowAtIndexPath:(NSIndexPath *)indexPath{   
    if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {       
             [cell setSeparatorInset:UIEdgeInsetsZero];    
    }    
    if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {        
             [cell setLayoutMargins:UIEdgeInsetsZero];    
    }
}

6. 计算方法耗时时间间隔

// 获取时间间隔
#define TICK   CFAbsoluteTime start = CFAbsoluteTimeGetCurrent();
#define TOCK   NSLog(@"Time: %f", CFAbsoluteTimeGetCurrent() - start)

7. Color颜色宏定义

// 随机颜色
#define RANDOM_COLOR [UIColor colorWithRed:arc4random_uniform(256) / 255.0 green:arc4random_uniform(256) / 255.0 blue:arc4random_uniform(256) / 255.0 alpha:1]
// 颜色(RGB)
#define RGBCOLOR(r, g, b) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:1]
// 利用这种方法设置颜色和透明值,可不影响子视图背景色
#define RGBACOLOR(r, g, b, a) [UIColor colorWithRed:(r)/255.0f green:(g)/255.0f blue:(b)/255.0f alpha:(a)]

8. Alert提示宏定义

#define Alert(_S_, ...) [[[UIAlertView alloc] initWithTitle:@"提示" message:[NSString stringWithFormat:(_S_), ##__VA_ARGS__] delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil] show]

9. 让iOS应用直接退出

- (void)exitApplication {
    AppDelegate *app = [UIApplication sharedApplication].delegate;
    UIWindow *window = app.window;

    [UIView animateWithDuration:1.0f animations:^{
        window.alpha = 0;
    } completion:^(BOOL finished) {
        exit(0);
    }];
}

10. NSArray 快速求总和 最大值 最小值 和 平均值

NSArray *array = [NSArray arrayWithObjects:@"2.0", @"2.3", @"3.0", @"4.0", @"10", nil];
CGFloat sum = [[array valueForKeyPath:@"@sum.floatValue"] floatValue];
CGFloat avg = [[array valueForKeyPath:@"@avg.floatValue"] floatValue];
CGFloat max =[[array valueForKeyPath:@"@max.floatValue"] floatValue];
CGFloat min =[[array valueForKeyPath:@"@min.floatValue"] floatValue];
NSLog(@"%f\n%f\n%f\n%f",sum,avg,max,min);

10. 修改Label中不同文字颜色

- (void)touchesEnded:(NSSet<UITouch> *)touches withEvent:(UIEvent *)event
{
    [self editStringColor:self.label.text editStr:@"好" color:[UIColor blueColor]];
}

- (void)editStringColor:(NSString *)string editStr:(NSString *)editStr color:(UIColor *)color {
    // string为整体字符串, editStr为需要修改的字符串
    NSRange range = [string rangeOfString:editStr];

    NSMutableAttributedString *attribute = [[NSMutableAttributedString alloc] initWithString:string];

    // 设置属性修改字体颜色UIColor与大小UIFont
    [attribute addAttributes:@{NSForegroundColorAttributeName:color} range:range];

    self.label.attributedText = attribute;
}

11. 播放声音

  #import<AVFoundation>
   //  1.获取音效资源的路径
   NSString *path = [[NSBundle mainBundle]pathForResource:@"pour_milk" ofType:@"wav"];
   //  2.将路劲转化为url
   NSURL *tempUrl = [NSURL fileURLWithPath:path];
   //  3.用转化成的url创建一个播放器
   NSError *error = nil;
   AVAudioPlayer *play = [[AVAudioPlayer alloc]initWithContentsOfURL:tempUrl error:&error];
   self.player = play;
   //  4.播放
   [play play];

12. 检测是否IPad Pro

- (BOOL)isIpadPro
{   
  UIScreen *Screen = [UIScreen mainScreen];   
  CGFloat width = Screen.nativeBounds.size.width/Screen.nativeScale;  
  CGFloat height = Screen.nativeBounds.size.height/Screen.nativeScale;         
  BOOL isIpad =[[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad;   
  BOOL hasIPadProWidth = fabs(width - 1024.f) < DBL xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed>> ~/.lldbinit
    echo target stop-hook add -o \"target stop-hook disable\" >> ~/.lldbinit
下次重新运行项目,然后就不报错了。

25. Label行间距

-(void)test{
    NSMutableAttributedString *attributedString =    
   [[NSMutableAttributedString alloc] initWithString:self.contentLabel.text];
    NSMutableParagraphStyle *paragraphStyle =  [[NSMutableParagraphStyle alloc] init];  
   [paragraphStyle setLineSpacing:3];

    //调整行间距       
   [attributedString addAttribute:NSParagraphStyleAttributeName 
                         value:paragraphStyle 
                         range:NSMakeRange(0, [self.contentLabel.text length])];
     self.contentLabel.attributedText = attributedString;
}

26. UIImageView填充模式

@"UIViewContentModeScaleToFill",      // 拉伸自适应填满整个视图  
@"UIViewContentModeScaleAspectFit",   // 自适应比例大小显示  
@"UIViewContentModeScaleAspectFill",  // 原始大小显示  
@"UIViewContentModeRedraw",           // 尺寸改变时重绘  
@"UIViewContentModeCenter",           // 中间  
@"UIViewContentModeTop",              // 顶部  
@"UIViewContentModeBottom",           // 底部  
@"UIViewContentModeLeft",             // 中间贴左  
@"UIViewContentModeRight",            // 中间贴右  
@"UIViewContentModeTopLeft",          // 贴左上  
@"UIViewContentModeTopRight",         // 贴右上  
@"UIViewContentModeBottomLeft",       // 贴左下  
@"UIViewContentModeBottomRight",      // 贴右下

27. 宏定义检测block是否可用

#define BLOCK_EXEC(block, ...) if (block) { block(__VA_ARGS__); };   
// 宏定义之前的用法
 if (completionBlock)   {   
    completionBlock(arg1, arg2); 
  }    
// 宏定义之后的用法
 BLOCK_EXEC(completionBlock, arg1, arg2);

28. Debug栏打印时自动把Unicode编码转化成汉字

// 有时候我们在xcode中打印中文,会打印出Unicode编码,还需要自己去一些在线网站转换,有了插件就方便多了。
 DXXcodeConsoleUnicodePlugin 插件

29. 设置状态栏文字样式颜色

[[UIApplication sharedApplication] setStatusBarHidden:NO];
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

30. 自动生成模型代码的插件

// 可自动生成模型的代码,省去写模型代码的时间
ESJsonFormat-for-Xcode

31. iOS中的一些手势

轻击手势(TapGestureRecognizer)
轻扫手势(SwipeGestureRecognizer)
长按手势(LongPressGestureRecognizer)
拖动手势(PanGestureRecognizer)
捏合手势(PinchGestureRecognizer)
旋转手势(RotationGestureRecognizer)

32. iOS 开发中一些相关的路径

模拟器的位置:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs 

文档安装位置:
/Applications/Xcode.app/Contents/Developer/Documentation/DocSets

插件保存路径:
~/Library/ApplicationSupport/Developer/Shared/Xcode/Plug-ins

自定义代码段的保存路径:
~/Library/Developer/Xcode/UserData/CodeSnippets/ 
如果找不到CodeSnippets文件夹,可以自己新建一个CodeSnippets文件夹。

证书路径
~/Library/MobileDevice/Provisioning Profiles

33. 获取 iOS 路径的方法

获取家目录路径的函数
NSString *homeDir = NSHomeDirectory();

获取Documents目录路径的方法
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docDir = [paths objectAtIndex:0];

获取Documents目录路径的方法
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachesDir = [paths objectAtIndex:0];

获取tmp目录路径的方法:
NSString *tmpDir = NSTemporaryDirectory();

34. 字符串相关操作

去除所有的空格
[str stringByReplacingOccurrencesOfString:@" " withString:@""]

去除首尾的空格
[str stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];

- (NSString *)uppercaseString; 全部字符转为大写字母
- (NSString *)lowercaseString 全部字符转为小写字母

35. CocoaPods pod install/pod update更新慢的问题

pod install --verbose --no-repo-update 
pod update --verbose --no-repo-update
如果不加后面的参数,默认会升级CocoaPods的spec仓库,加一个参数可以省略这一步,然后速度就会提升不少。

36. MRC和ARC混编设置方式

在XCode中targets的build phases选项下Compile Sources下选择 不需要arc编译的文件
双击输入 -fno-objc-arc 即可

MRC工程中也可以使用ARC的类,方法如下:
在XCode中targets的build phases选项下Compile Sources下选择要使用arc编译的文件
双击输入 -fobjc-arc 即可

37. 把tableview里cell的小对勾的颜色改成别的颜色

_mTableView.tintColor = [UIColor redColor];

38. 调整tableview的separaLine线的位置

tableView.separatorInset = UIEdgeInsetsMake(0, 100, 0, 0);

39. 设置滑动的时候隐藏navigationbar

navigationController.hidesBarsOnSwipe = Yes

40. 自动处理键盘事件,实现输入框防遮挡的插件

IQKeyboardManager
https://github.com/hackiftekhar/IQKeyboardManager

41. Quartz2D相关

图形上下是一个CGContextRef类型的数据。
图形上下文包含:
1,绘图路径(各种各样图形)
2,绘图状态(颜色,线宽,样式,旋转,缩放,平移)
3,输出目标(绘制到什么地方去?UIView、图片)

1,获取当前图形上下文
CGContextRef ctx = UIGraphicsGetCurrentContext();
2,添加线条
CGContextMoveToPoint(ctx, 20, 20);
3,渲染
CGContextStrokePath(ctx);
CGContextFillPath(ctx);
4,关闭路径
CGContextClosePath(ctx);
5,画矩形
CGContextAddRect(ctx, CGRectMake(20, 20, 100, 120));
6,设置线条颜色
[[UIColor redColor] setStroke];
7, 设置线条宽度
CGContextSetLineWidth(ctx, 20);
8,设置头尾样式
CGContextSetLineCap(ctx, kCGLineCapSquare);
9,设置转折点样式
CGContextSetLineJoin(ctx, kCGLineJoinBevel);
10,画圆
CGContextAddEllipseInRect(ctx, CGRectMake(30, 50, 100, 100));
11,指定圆心
CGContextAddArc(ctx, 100, 100, 50, 0, M_PI * 2, 1);
12,获取图片上下文
UIGraphicsGetImageFromCurrentImageContext();
13,保存图形上下文
CGContextSaveGState(ctx)
14,恢复图形上下文
CGContextRestoreGState(ctx)

42. 屏幕截图

    // 1. 开启一个与图片相关的图形上下文
    UIGraphicsBeginImageContextWithOptions(self.view.bounds.size,NO,0.0);

    // 2. 获取当前图形上下文
    CGContextRef ctx = UIGraphicsGetCurrentContext();

    // 3. 获取需要截取的view的layer
    [self.view.layer renderInContext:ctx];

    // 4. 从当前上下文中获取图片
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    // 5. 关闭图形上下文
    UIGraphicsEndImageContext();

    // 6. 把图片保存到相册
    UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

第二种写法

  /**
     *截图功能
     */
     -(void)screenShot{
         
         
         CGRect rect = self.view.frame;
         UIGraphicsBeginImageContext(rect.size);
         CGContextRef context = UIGraphicsGetCurrentContext();
         [self.view.layer renderInContext:context];
         UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
         UIGraphicsEndImageContext();
         
         i = [[UIImageView alloc]initWithFrame:CGRectMake(20, 70, 300, 500)];
         i.layer.borderColor = [UIColor redColor].CGColor;
         i.layer.borderWidth = 2;
         i.image = img;
         
         [self.view addSubview:i];
         i.userInteractionEnabled = YES;
         //tap手势
         UITapGestureRecognizer *tapGesture=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(event:)];
         [i addGestureRecognizer:tapGesture];
         [tapGesture setNumberOfTapsRequired:1];
         
     }

43. 隐藏导航栏上的返回字体

//Swift
UIBarButtonItem.appearance().setBackButtonTitlePositionAdjustment(UIOffsetMake(0, -60), forBarMetrics: .Default)
//OC
[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60) forBarMetrics:UIBarMetricsDefault];

44. 解决tableview的分割线短一截

-(void)viewDidLayoutSubviews{
if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)])
{ 
[self.tableView setSeparatorInset:UIEdgeInsetsMake(0,0,0,0)];
}
if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) 
{
[self.tableView setLayoutMargins:UIEdgeInsetsMake(0,0,0,0)]; 
}
}
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
if ([cell respondsToSelector:@selector(setSeparatorInset:)]) 
{
[cell setSeparatorInset:UIEdgeInsetsZero]; 
} 
if ([cell respondsToSelector:@selector(setLayoutMargins:)]) 
{
[cell setLayoutMargins:UIEdgeInsetsZero]; 
}
}

45. 动态隐藏NavigationBar

//1.当我们的手离开屏幕时候隐藏
- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
{ 
if(velocity.y > 0) 
{
[self.navigationController setNavigationBarHidden:YES animated:YES];
} else {
[self.navigationController setNavigationBarHidden:NO animated:YES]; 
}
}
velocity.y这个量,在上滑和下滑时,变化极小(小数),但是因为方向不同,有正负之分,这就很好处理了。
//2.在滑动过程中隐藏
//像safari
(1) 
self.navigationController.hidesBarsOnSwipe = YES;
(2)
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
 CGFloat offsetY = scrollView.contentOffset.y + __tableView.contentInset.top;
 CGFloat panTranslationY = [scrollView.panGestureRecognizer translationInView:self.tableView].y;
 if (offsetY > 64) {
 if (panTranslationY > 0) 
{ 
//下滑趋势,显示 
[self.navigationController setNavigationBarHidden:NO animated:YES];
} else { 
//上滑趋势,隐藏 
[self.navigationController setNavigationBarHidden:YES animated:YES]; 
}
} else {
[self.navigationController setNavigationBarHidden:NO animated:YES]; 
}
}
这里的offsetY > 64只是为了在视图滑过navigationBar的高度之后才开始处理,防止影响展示效果。panTranslationY是scrollView的pan手势的手指位置的y值,可能不是太好,因为panTranslationY这个值在较小幅度上下滑动时,可能都为正或都为负,这就使得这一方式不太灵敏.

效果图

46. 设置导航栏透明

1第一种方式

//方法一:设置透明度
[[[self.navigationController.navigationBar subviews]objectAtIndex:0] setAlpha:0.1];
//方法二:设置背景图片
/**
 * 设置导航栏,使其透明
 *
*/
- (void)setNavigationBarColor:(UIColor *)color targetController:(UIViewController *)targetViewController{
//导航条的颜色 以及隐藏导航条的颜色targetViewController.navigationController.navigationBar.shadowImage = [[UIImage alloc]init]; 
CGRect rect=CGRectMake(0.0f, 0.0f, 1.0f, 1.0f); UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(context, [color CGColor]); CGContextFillRect(context, rect); 
UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); [targetViewController.navigationController.navigationBar setBackgroundImage:theImage forBarMetrics:UIBarMetricsDefault];
}

2、设置透明导航栏

立即投资BG为默认的导航栏 背景图片  

透明navbarBG 是一张纯透明的png 图片

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    [self createNav];
  
}
- (void)createNav
{
    //替换导航栏透明
    UINavigationBar *navigationBar = self.navigationController.navigationBar;
    [navigationBar setTitleTextAttributes:@{
                                            NSForegroundColorAttributeName :[UIColor whiteColor]
                                            }];
    //navigationBar.alpha = 0;
    [navigationBar setBackgroundImage:[UIImage imageNamed:@"透明navbarBG"] forBarMetrics:UIBarMetricsDefault];
    [navigationBar setBackgroundImage:[UIImage imageNamed:@"透明navbarBG"] forBarMetrics:UIBarMetricsCompact];
    //去黑线
    [navigationBar setBackgroundImage:[UIImage imageNamed:@"透明navbarBG"] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault];
    [navigationBar setShadowImage:[UIImage new]];
}
//退出页面时候 恢复不透明
-(void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"立即投资BG"] forBarMetrics:UIBarMetricsDefault];
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"立即投资BG"] forBarMetrics:UIBarMetricsCompact];
   }
// 当滚动视图滚动到最顶端后,执行该方法 
//向上滚动时候不透明
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
    
    
    // NSLog(@"scrollViewDidScroll");
    
    CGPoint point=scrollView.contentOffset;
    if(point.y>5){
        [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"立即投资BG"] forBarMetrics:UIBarMetricsDefault];
        [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"立即投资BG"] forBarMetrics:UIBarMetricsCompact];
        self.navigationController.navigationBar.barTintColor=[UIColor colorWithRed:243/255.0 green:90.0/255.0 blue:3.0/255.0 alpha:1.0];
    }else{
        UINavigationBar *navigationBar = self.navigationController.navigationBar;
        [navigationBar setTitleTextAttributes:@{
                                                NSForegroundColorAttributeName :[UIColor whiteColor]
                                                }];
        //navigationBar.alpha = 0;
        [navigationBar setBackgroundImage:[UIImage imageNamed:@"透明navbarBG"] forBarMetrics:UIBarMetricsDefault];
        [navigationBar setBackgroundImage:[UIImage imageNamed:@"透明navbarBG"] forBarMetrics:UIBarMetricsCompact];
    }
    // NSLog(@"%f,%f",point.x,point.y);
    // 从中可以读取contentOffset属性以确定其滚动到的位置。
    // 注意:当ContentSize属性小于Frame时,将不会出发滚动
}

47. 设置字体和行间距

//设置字体和行间距 
UILabel * lable = [[UILabel alloc]initWithFrame:CGRectMake(50, 100, 300, 200)]; 
lable.text = @"大家好,我是Frank_chun,在这里我们一起学习新的知识,总结我们遇到的那些坑,共同的学习,共同的进步,共同的努力,只为美好的明天!!!有问题一起相互的探讨--438637472!!!"; 
lable.numberOfLines = 0;
lable.font = [UIFont systemFontOfSize:12];
lable.backgroundColor = [UIColor grayColor]; 
[self.view addSubview:lable]; 
//设置每个字体之间的间距 
//NSKernAttributeName 这个对象所对应的值是一个NSNumber对象(包含小数),作用是修改默认字体之间的距离调整,值为0的话表示字距调整是禁用的; NSMutableAttributedString * str = [[NSMutableAttributedString alloc]initWithString:lable.text attributes:@{NSKernAttributeName:@(5.0)}];
//设置某写字体的颜色
//NSForegroundColorAttributeName 设置字体颜色
NSRange blueRange = NSMakeRange([[str string] rangeOfString:@"Frank_chun"].location, [[str string] rangeOfString:@"Frank_chun"].length); 
[str addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:blueRange]; 
NSRange blueRange1 = NSMakeRange([[str string] rangeOfString:@"438637472"].location, [[str string] rangeOfString:@"438637472"].length);
[str addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:blueRange1];
//设置每行之间的间距 
//NSParagraphStyleAttributeName 设置段落的样式
NSMutableParagraphStyle * par = [[NSMutableParagraphStyle alloc]init];
[par setLineSpacing:20];
//为某一范围内文字添加某个属性
//NSMakeRange表示所要的范围,从0到整个文本的长度
[str addAttribute:NSParagraphStyleAttributeName value:par range:NSMakeRange(0, lable.text.length)]; [lable setAttributedText:str];

效果图

48. 点击button倒计时

//第一种方法
//点击button倒计时
#import "ViewController.h"
@interface ViewController ()
@property (nonatomic, strong) UIButton * timeButton;
@property (nonatomic, strong) NSTimer * timer;
@property (nonatomic, strong)UIButton * btn;
@end@implementation ViewController
{ 
NSInteger _time;
}
- (void)viewDidLoad {
[super viewDidLoad]; 
_time = 5; 
self.btn = [UIButton buttonWithType:UIButtonTypeCustom]; _btn.backgroundColor = [UIColor orangeColor];
[_btn setTitle:@"获取验证码" forState:UIControlStateNormal]; _btn.titleLabel.font = [UIFont systemFontOfSize:15];
[_timeButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[_btn addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
[self refreshButtonWidth]; 
[self.view addSubview:self.btn];
}
- (void)refreshButtonWidth{ 
CGFloat width = 0; 
if (_btn.enabled){
 width = 100; 
} else { 
width = 200;
} 
_btn.center = CGPointMake(self.view.frame.size.width/2, 200);
_btn.bounds = CGRectMake(0, 0, width, 40); 
//每次刷新,保证区域正确
[_btn setBackgroundImage:[self imageWithColor:[UIColor orangeColor] andSize:_btn.frame.size] forState:UIControlStateNormal];
[_btn setBackgroundImage:[self imageWithColor:[UIColor lightGrayColor] andSize:_btn.frame.size] forState:UIControlStateDisabled];
}
- (UIImage *)imageWithColor:(UIColor *)color andSize:(CGSize)aSize{
 CGRect rect = CGRectMake(0.0f, 0.0f, aSize.width, aSize.height); UIGraphicsBeginImageContext(rect.size);
 CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetFillColorWithColor(context, [color CGColor]); CGContextFillRect(context, rect);
 UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext();
return image;
}
- (void)btnAction:(UIButton *)sender{
sender.enabled = NO;
[self refreshButtonWidth];
[sender setTitle:[NSString stringWithFormat:@"获取验证码(%zi)", _time] forState:UIControlStateNormal]; 
_timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(timeDown) userInfo:nil repeats:YES];
}
- (void)timeDown{ 
_time --;
 if (_time == 0) {
 [_btn setTitle:@"重新获取" forState:UIControlStateNormal]; _btn.enabled = YES; 
[self refreshButtonWidth]; 
[_timer invalidate]; 
_timer = nil; 
_time = 5 ; 
return; 
} 
[_btn setTitle:[NSString stringWithFormat:@"获取验证码(%zi)", _time] forState:UIControlStateNormal];
}
//第二种方法
#pragma mark -点击发送验证码
- (void)sendMessage:(UIButton *)btn{
if (self.phoneField.text.length == 0) { 
[self remindMessage:@"请输入正确的手机号"];
}else{ 
__block int timeout=60; 
//倒计时时间 
dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0,queue); dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0);
 //每秒执行 
dispatch_source_set_event_handler(_timer, ^{ 
if(timeout<=0){ 
//倒计时结束,关闭 
dispatch_source_cancel(_timer); dispatch_async(dispatch_get_main_queue(), ^{ 
// 设置界面的按钮显示 根据自己需求设置 
[btn setTitle:@"发送验证码" forState:UIControlStateNormal]; btn.userInteractionEnabled = YES; 
}); 
}else{ 
int seconds = timeout % 60;
NSString *strTime = [NSString stringWithFormat:@"%d", seconds];
if ([strTime isEqualToString:@"0"]) {
 strTime = [NSString stringWithFormat:@"%d",60];
 } 
dispatch_async(dispatch_get_main_queue(), ^{ 
//设置界面的按钮显示 根据自己需求设置 
//NSLog(@"____%@",strTime);
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1]; 
[btn setTitle:[NSString stringWithFormat:@"%@秒后重新发送",strTime] forState:UIControlStateNormal];
[UIView commitAnimations]; 
btn.userInteractionEnabled = NO;
 });
 timeout--;
 } 
}); 
dispatch_resume(_timer);
}

效果图

49. UITextField默认占位符是居中显示,让其居上显示

textField.contentVerticalAlignment = UIControlContentVerticalAlignmentTop;

50. 解决同时按两个按钮进两个view的问题

[button setExclusiveTouch:YES];

51. 图片拉伸

UIImage* img=[UIImage imageNamed:@"2.png"];//原图
UIEdgeInsets edge=UIEdgeInsetsMake(0, 10, 0,10);
//UIImageResizingModeStretch:拉伸模式,通过拉伸UIEdgeInsets指定的矩形区域来填充图片
//UIImageResizingModeTile:平铺模式,通过重复显示UIEdgeInsets指定的矩形区域来填充图
img= [img resizableImageWithCapInsets:edge resizingMode:UIImageResizingModeStretch];
self.imageView.image=img;

52. 修改textFieldplaceholder字体颜色和大小

textField.placeholder = @"username is in here!";  
[textField setValue:[UIColor redColor] forKeyPath:@"_placeholderLabel.textColor"];  
[textField setValue:[UIFont boldSystemFontOfSize:16] forKeyPath:@"_placeholderLabel.font"];

53. 修改状态栏字体颜色

只能设置两种颜色,黑色和白色,系统默认黑色
设置为白色方法:
(1)在plist里面添加Status bar style,值为UIStatusBarStyleLightContent(白色)或UIStatusBarStyleDefault(黑 色)
(2)在Info.plist中设置UIViewControllerBasedStatusBarAppearance 为NO

54. 去掉导航栏下边的黑线

[self.navigationController.navigationBar setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar.shadowImage = [[UIImage alloc] init];

55. 修改pagecontrol颜色

_pageControl.currentPageIndicatorTintColor=SFQRedColor;
_pageControl.pageIndicatorTintColor=SFQGrayColor;

56. 去掉UITableView的section的粘性,使其不会悬停

//有时候使用UITableView所实现的列表,会使用到section,但是又不希望它粘在最顶上而是跟随滚动而消失或者出现
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {  
    if (scrollView == _tableView) {  
        CGFloat sectionHeaderHeight = 36;

        if (scrollView.contentOffset.y <= sectionHeaderHeight && scrollView.contentOffset.y >= 0) {  
            scrollView.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);  
        } else if (scrollView.contentOffset.y >= sectionHeaderHeight) {  
            scrollView.contentInset = UIEdgeInsetsMake(-sectionHeaderHeight, 0, 0, 0);  
        }  
    }  
}

57. 通过2D仿射函数实现小的动画效果(变大缩小) --可用于自定义pageControl中

[UIView animateWithDuration:0.3 animations:^{
       imageView.transform = CGAffineTransformMakeScale(2, 2);
       } completion:^(BOOL finished) {
       imageView.transform = CGAffineTransformMakeScale(1.0, 1.0);
       }];

58. UIImage与字符串互转

//图片转字符串  
-(NSString *)UIImageToBase64Str:(UIImage *) image  
{  
    NSData *data = UIImageJPEGRepresentation(image, 1.0f);  
    NSString *encodedImageStr = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];  
    return encodedImageStr;  
}

//字符串转图片  
-(UIImage *)Base64StrToUIImage:(NSString *)_encodedImageStr  
{  
    NSData *_decodedImageData   = [[NSData alloc] initWithBase64Encoding:_encodedImageStr];  
    UIImage *_decodedImage      = [UIImage imageWithData:_decodedImageData];  
    return _decodedImage;  
}

59. 判断NSString中是否包含中文

-(BOOL)isChinese:(NSString *)str{
    NSString *match=@"(^[\u4e00-\u9fa5]+$)";
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF matches %@", match];
    return [predicate evaluateWithObject:str];
}

60. NSDate与NSString的相互转化

-(NSString *)dateToString:(NSDate *)date {
  // 初始化时间格式控制器
  NSDateFormatter *matter = [[NSDateFormatter alloc] init];
  // 设置设计格式
  [matter setDateFormat:@"yyyy-MM-dd hh:mm:ss zzz"];
  // 进行转换
  NSString *dateStr = [matter stringFromDate:date];
  return dateStr;
}
-(NSDate *)stringToDate:(NSString *)dateStr {

  // 初始化时间格式控制器
  NSDateFormatter *matter = [[NSDateFormatter alloc] init];
  // 设置设计格式
  [matter setDateFormat:@"yyyy-MM-dd hh:mm:ss zzz"];
  // 进行转换
  NSDate *date = [matter dateFromString:dateStr];
  return date;
}

61、imageView添加手势

     imageview.userInteractionEnabled = YES;
     //tap手势
     UITapGestureRecognizer *tapGesture=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(event:)];
     [imageview addGestureRecognizer:tapGesture];
    [tapGesture setNumberOfTapsRequired:1];

    - (void)event:(UITapGestureRecognizer *)gesture
    {
        NSLog(@"单击");
    }

62、获取请求连接里边的cookies

#pragma mark //获取请求连接的cookies
     
 [manager POST:urlStr parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
    if (success) {
        success(responseObject);
        
        NSDictionary *fields = [operation.response allHeaderFields]; //afnetworking写法
        NSLog(@"fields = %@",[fields description]);
        // NSURL *url = [NSURL URLWithString:@"http://api.skyfox.org/api-test.php"];
        NSURL *url = [NSURL URLWithString:urlStr];
        //获取cookie方法1
        NSArray *cookies = [NSHTTPCookie cookiesWithResponseHeaderFields:fields forURL:url];
        NSLog(@"11--%@",cookies);
        //获取cookie方法2
        //NSString *cookieString = [[HTTPResponse allHeaderFields] valueForKey:@"Set-Cookie"];
    }
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    //  NSLog(@"%@", error);
    if (fail) {
        fail();
    }
}];

63图片旋转

   imageView1 .transform=CGAffineTransformMakeRotation(M_PI_2);

64、获取字符串在label中需要的宽度

#pragma mark //获取字符串需要的宽度
 +(CGFloat)ZFYtextWidthFromTextString:(NSString *)text fontSize:(CGFloat)size{
     
     CGSize size1 = [text sizeWithAttributes:@{NSFontAttributeName: [UIFont systemFontOfSize:size]}];    //返回计算出的行高
     return size1.width;
 }

65、获取字符串在label中需要的高度

 #pragma mark//获取字符串需要的高度
 +(CGFloat)ZFYtextHeightFromTextString:(NSString *)text width:(CGFloat)textWidth fontSize:(CGFloat)size{
     
     NSDictionary *dict = @{NSFontAttributeName:[UIFont systemFontOfSize:size]};
     CGRect rect = [text boundingRectWithSize:CGSizeMake(textWidth, MAXFLOAT) options:NSStringDrawingTruncatesLastVisibleLine|NSStringDrawingUsesFontLeading|NSStringDrawingUsesLineFragmentOrigin attributes:dict context:nil];
     //返回计算出的行高
     return rect.size.height;
 }

66、汉字和Unicode编码转换

#pragma mark//Unicode转汉字   \u5f20\u4e09 → 张三
 - (NSString *)replaceUnicode:(NSString *)unicodeStr {
     //张三  \u5f20\u4e09
     
     NSString *tempStr1 = [unicodeStr stringByReplacingOccurrencesOfString:@"\\u" withString:@"\\U"];
     NSString *tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];
     NSString *tempStr3 = [[@"\"" stringByAppendingString:tempStr2] stringByAppendingString:@"\""];
     NSData *tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding];
     NSString* returnStr = [NSPropertyListSerialization propertyListFromData:tempData
                                                            mutabilityOption:NSPropertyListImmutable
                                                                      format:NULL
                                                            errorDescription:NULL];
     
     //  NSLog(@"Output = %@", returnStr);
     return [returnStr stringByReplacingOccurrencesOfString:@"\\r\\n" withString:@"\n"];
 }
#pragma mark//汉字转 Unicode   张三 →  \u5f20\u4e09
 -(NSString *) utf8ToUnicode:(NSString *)string{
     
     NSUInteger length = [string length];
     NSMutableString *s = [NSMutableString stringWithCapacity:0];
     for (int i = 0;i < length; i++){
         unichar _char = [string characterAtIndex:i];
         //判断是否为英文和数字
         if (_char <= '9' && _char >='0'){
             [s appendFormat:@"%@",[string substringWithRange:NSMakeRange(i,1)]];
         }else if(_char >='a' && _char <= 'z'){
             [s appendFormat:@"%@",[string substringWithRange:NSMakeRange(i,1)]];
         }else if(_char >='A' && _char <= 'Z')
         {
             [s appendFormat:@"%@",[string substringWithRange:NSMakeRange(i,1)]];
         }else{
             [s appendFormat:@"\\u%x",[string characterAtIndex:i]];
         }
     }
     return s;
 }

67、获取间隔一天 一年一秒之后的时间


#pragma mark //获取相对时间  获取两个月前的时间  -2 为两个月前时间   2为两个月后时间
 - (void)RelativeTime {
     NSDateComponents * components = [[NSDateComponents alloc] init];
     components.month = -2;
     //    components.day = 10;
     //    components.hour = 10;
     NSCalendar * calendar = [NSCalendar currentCalendar];
     
     NSDate * currentDate = [NSDate date];
     NSDate * nextData = [calendar dateByAddingComponents:components toDate:currentDate options:NSCalendarMatchStrictly];
     NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
     
     formatter.dateFormat = @"yyyy年MM月dd日HH时mm分ss秒";
     NSString * str = [formatter stringFromDate:nextData];
     NSLog(@"%@",str);
     
 }

68、打印系统字体库名字

#pragma mark   打印系统字体库 名字
 NSArray *familyNames = [UIFont familyNames];
 for( NSString *familyName in familyNames )
 {
     printf( "Family: %s \n", [familyName UTF8String]);
     
     NSArray *fontNames = [UIFont fontNamesForFamilyName:familyName];
     for( NSString *fontName in fontNames )
     {
         printf( "\tFont: %s \n", [fontName UTF8String] );
         
     }
 }

69、 截取正方形的图片

//截取正方形的图片 centerBool为YES  表示从中心开始截取
+(UIImage*)getSubImage:(UIImage *)image mCGRect:(CGRect)mCGRect centerBool:(BOOL)centerBool{
 /*如若centerBool为Yes则是由中心点取mCGRect范围的图片*/
 
 float imgWidth = image.size.width;
 float imgHeight = image.size.height;
 float viewWidth = mCGRect.size.width;
 float viewHidth = mCGRect.size.height;
 CGRect rect;
 if(centerBool)
     rect = CGRectMake((imgWidth-viewWidth)/2,(imgHeight-viewHidth)/2,viewWidth,viewHidth);
 else{
     if(viewHidth<viewWidth)
     {
         if(imgWidth<= imgHeight)
         {
             rect=CGRectMake(0, 0,imgWidth, imgWidth*viewHidth/viewWidth);
         }else
         {
             float width = viewWidth*imgHeight/viewHidth;
             float x = (imgWidth  - width)/2;
             if(x>0)
             {
                 rect = CGRectMake(x,0,  width, imgHeight);
             }else
             {
                 rect =  CGRectMake(0,  0,  imgWidth, imgWidth*viewHidth/viewWidth);
             }
         }
     }else
     {
         if(imgWidth <= imgHeight)
         {
             float height = viewHidth*imgWidth/viewWidth;
             if(height< imgHeight)
             {
                 rect =CGRectMake(0,  0, imgWidth, height);
             }else
             {
                 rect = CGRectMake(0,  0,viewWidth*imgHeight/viewHidth, imgHeight);
             }
         }else
         {
             float width = viewWidth*imgHeight/viewHidth;
             if(width< imgWidth)
             {
                 float x =  (imgWidth - width)/2;
                 rect =CGRectMake(x,  0,width, imgHeight);
             }else
             {
                 rect =CGRectMake(0,  0,imgWidth, imgHeight);
             }
         }
     }
 }
 
 CGImageRef subImageRef = CGImageCreateWithImageInRect(image.CGImage,rect);
 CGRect smallBounds =CGRectMake(0, 0,CGImageGetWidth(subImageRef),CGImageGetHeight(subImageRef));
 
 UIGraphicsBeginImageContext(smallBounds.size); CGContextRef context =UIGraphicsGetCurrentContext();CGContextDrawImage(context, smallBounds, subImageRef);
 UIImage *smallImage =[UIImage imageWithCGImage:subImageRef];
 UIGraphicsEndImageContext();
 
 return smallImage;
}

70、跳转APPstore

//APPid就是上面的那串数字

NSString  *urlStr = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/app/id%@",APPID];
NSURL *url = [NSURLURLWithString:urlStr];

[[UIApplicationsharedApplication]openURL:url];

71、 获取本机APP 版本号

#pragma mark --  //获取本地版本号
     //获取本地版本号
     NSString* thisVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"];

72、获取APP store 项目版本号

#pragma mark -- 获取appstore版本号
-(void)Postpath:(NSString *)path
{
NSString *url = [[NSString alloc] initWithFormat:@"http://itunes.apple.com/lookup?id=%@",@"414478124"];
NSURL *url = [NSURL URLWithString:path];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
                                                       cachePolicy:NSURLRequestReloadIgnoringCacheData
                                                   timeoutInterval:10];

[request setHTTPMethod:@"POST"];


NSOperationQueue *queue = [NSOperationQueue new];

[NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response,NSData *data,NSError *error){
    NSMutableDictionary *receiveStatusDic=[[NSMutableDictionary alloc]init];
    if (data) {
        
        NSDictionary *receiveDic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
        if ([[receiveDic valueForKey:@"resultCount"] intValue]>0) {
            
            [receiveStatusDic setValue:@"1" forKey:@"status"];
            [receiveStatusDic setValue:[[[receiveDic valueForKey:@"results"] objectAtIndex:0] valueForKey:@"version"]   forKey:@"version"];
        }else{
            
            [receiveStatusDic setValue:@"-1" forKey:@"status"];
        }
    }else{
        [receiveStatusDic setValue:@"-1" forKey:@"status"];
    }
    
    [self performSelectorOnMainThread:@selector(receiveData:) withObject:receiveStatusDic waitUntilDone:NO];
}];  

}  
-(void)receiveData:(id)sender  
{  
NSLog(@"receiveData=%@",sender);  //打印获取到的版本号

}

73、取消所有响应者(关闭所有键盘)

//取消窗口第一响应
[[[UIApplication sharedApplication] keyWindow] endEditing:YES];

74、加载html时候 让大图不超出屏幕

//css 控制
<head><style>img{width:100%% !important;}</style></head>
//js 控制
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    [webView stringByEvaluatingJavaScriptFromString:     @"var script = document.createElement('script');"
     "script.type = 'text/javascript';"
     "script.text = /"function ResizeImages() { "
         "var myimg,oldwidth,oldheight;"
         "var maxwidth=320;"// 图片宽度
         "for(i=0;i  maxwidth){"
         "myimg.width = maxwidth;"
         "}"
         "}"
         "}/";"
         "document.getElementsByTagName('head')[0].appendChild(script);"];
         [webView stringByEvaluatingJavaScriptFromString:@"ResizeImages();"];
     }

75、监听textfiled的输入情况

#pragma mark   UITextField   ----监听

[timesField addTarget:self
               action:@selector(textFieldDidChange:)
     forControlEvents:UIControlEventEditingChanged]; // 监听事件

监听事件:

// 监听改变按钮
- (void) textFieldDidChange:(UITextField*) textField {
    
   
}

 

76、页面跳转返回按钮的文字

///设置push 之后返回按钮的 字体
UIBarButtonItem *backbutton = [[UIBarButtonItem alloc]init];
backbutton.title = @"";
self.navigationItem.backBarButtonItem = backbutton;

77、/跳转之后隐藏  返回键

 life.navigationItem.hidesBackButton = YES;

78、计算webview的高

- (void)webViewDidFinishLoad:(UIWebView *)aWebView {
    CGRect frame = aWebView.frame;
    frame.size.height = 1;
    aWebView.frame = frame;
    CGSize fittingSize = [aWebView sizeThatFits:CGSizeZero];
    frame.size = fittingSize;
    aWebView.frame = frame;

    NSLog(@"size: %f, %f", fittingSize.width, fittingSize.height);
}

79、设置阴影

  #pragma mark  //设置 阴影
    [[self.calendarView layer] setShadowOffset:CGSizeMake(0, 0)];
    [[self.calendarView  layer] setShadowRadius:3];
    [[self.calendarView  layer] setShadowOpacity:0.4] ;
    [[self.calendarView  layer] setShadowColor:[UIColor blackColor].CGColor];

80、对键盘的监听

#pragma mark 键盘监听

[[NSNotificationCenter defaultCenter] addObserver:self
 
                                         selector:@selector(keyboardWasShown:)
 
                                             name:UIKeyboardWillShowNotification object:nil];

//注册键盘消失的通知

[[NSNotificationCenter defaultCenter] addObserver:self
 
                                         selector:@selector(keyboardWillBeHidden:)
 
                                             name:UIKeyboardWillHideNotification object:nil];

- (void)keyboardWasShown:(NSNotification*)aNotification

{
    
    //键盘高度
    NSDictionary *userInfo = [aNotification userInfo];
    //NSLog(@"%@",userInfo);
    NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardRect = [aValue CGRectValue];
    NSInteger height = keyboardRect.size.height;
    
    CGFloat time = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];
    
}


-(void)keyboardWillBeHidden:(NSNotification*)aNotification

{
    
    
}

81、禁止webview 滚动

#pragma mark //禁止微webview 上下拖动
UIWebView * d_intro = [[UIWebView alloc] init];
d_intro.delegate = self;
d_intro.dataDetectorTypes = UIDataDetectorTypeLink;
//取消右侧,下侧滚动条,去处上下滚动边界的黑色背景
d_intro.backgroundColor=[UIColor clearColor];
for (UIView *_aView in [d_intro subviews])
{
    if ([_aView isKindOfClass:[UIScrollView class]])
    {
        [(UIScrollView *)_aView setShowsVerticalScrollIndicator:NO];
        //右侧的滚动条
        
        [(UIScrollView *)_aView setShowsHorizontalScrollIndicator:NO];
        //下侧的滚动条
        
        for (UIView *_inScrollview in _aView.subviews)
        {
            if ([_inScrollview isKindOfClass:[UIImageView class]])
            {
                _inScrollview.hidden = YES;  //上下滚动出边界时的黑色的图片
            }
        }
    }
}
[self.view addSubview:d_intro];

82、图片保存本地沙盒、

#pragma mark 图片保存沙盒
- (void)setHeadBgImage
{
    BOOL success;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    //NSError *error;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths firstObject];
    NSString *imageFilePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"selfPhoto%d.jpg", [LoginManager sharedManager].userBasicInfo.uid]];
    success = [fileManager fileExistsAtPath:imageFilePath];
    UIImage *image1 = nil;
    if ([LoginManager sharedManager].loginSucess) {
        if (success) {
            NSData *data = [fileManager contentsAtPath:imageFilePath];
            image1 = [UIImage imageWithData:data];
        }
    }else{
        image1 = [UIImage imageNamed:@"account_head_bg"];
    }
    // NSLog(@"%@-%u",imageFilePath,success);
    
    [self setHeadBGImage:image1];
}




- (void)saveImage:(UIImage *)image
{
    BOOL success;
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSError *error;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths firstObject];
    NSString *imageFilePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"selfPhoto%d.jpg", [LoginManager sharedManager].userBasicInfo.uid]];
    success = [fileManager fileExistsAtPath:imageFilePath];
    if (success) {
        success = [fileManager removeItemAtPath:imageFilePath error:&error];
    }
    BOOL result = [UIImagePNGRepresentation(image)writeToFile: imageFilePath    atomically:YES]; // 保存成功会返回YES
    //UIImage *smallImage = [self thumbnailWithImageWithoutScale:image size:CGSizeMake(self.view.frame.size.width, 315)];
    NSLog(@"%@-%u",imageFilePath,result);
    
    [self setHeadBGImage:image];
}

83、图片旋转360度

#pragma mark //旋转360 度 动画
-(void) startAnimation
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.01];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(endAnimation)];
    _rechargeCover.transform = CGAffineTransformMakeRotation(angle * (M_PI / 180.0f));
    NSLog(@"%f",angle * (M_PI / 180.0f));
    [UIView commitAnimations];
    
}
-(void)endAnimation
{
    angle += 10;
    if (angle < 360) {
        [self startAnimation];
    }
    
}

84、常用宏

#define DeviceMaxHeight ([UIScreen mainScreen].bounds.size.height)
#define DeviceMaxWidth ([UIScreen mainScreen].bounds.size.width)
#define widthRate DeviceMaxWidth/320
#define IOS8 ([[UIDevice currentDevice].systemVersion intValue] >= 8 ? YES : NO)
// RGB颜色
#define UIColorFromRGB1(r, g, b) [UIColor colorWithRed:(r)/255.0 green:(g)/255.0 blue:(b)/255.0 alpha:1.0]
#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]

85、获取故事版的 vc

UIStoryboard *login = [UIStoryboard storyboardWithName:@"LoginModule" bundle:nil];
AlsNoticeController* alsNoticeController = [login instantiateViewControllerWithIdentifier:@"LoginVC"];
[self.navigationController pushViewController:alsNoticeController animated:YES];

 

86、设置windows覆盖层

 #pragma mark  //设置覆盖层视图
if (![[NSUserDefaults standardUserDefaults] boolForKey:@"guideFirst"])  {
    _guideCoverView =[[UIView alloc]initWithFrame:self.view.bounds];
    _guideCoverView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.6];
    UIWindow* currentWindow = [UIApplication sharedApplication].keyWindow;
    [currentWindow addSubview:_guideCoverView];
    

}

87、设置透明度并且不影响子视图

#pragma mark 视图透明度 不影响子视图
alterView.backgroundColor=[[UIColor whiteColor] colorWithAlphaComponent:1];

88、剪切板的复制

#pragma mark 复制到系统剪切版
UIPasteboard *pasteboard = [UIPasteboard generalPasteboard];

pasteboard.string = self.label.text;

89、cocoPods常用指令

#pragma mark cocosPods指令
pod install --verbose --no-repo-update

pod list  列出所有可用的第三方库

pod search query 搜包含query的第三方库   注意:这两个命令只搜存在于本地 /Users/yohunl/.cocoapods/ 下的文件

如果搜索网络的,可以先更新本地  pod repo update master,然后再搜索

pod lib create frameworkName  创建一个framework工程

pod lib lint 验证一个podspec文件是否有错误

podinstall --no-repo-update错误 这里的参数—no-repo-update,是告诉cocoapods不要更新repo.有么有感觉每次pod install都很慢,那是因为每一次都会先更新本地的repo,加上此参数,就跳过了这个过程,将会很快

pod init 可以建立一个空的podfile

建立pod的spec文件   pod spec create spec名字  http://www.theonlylars.com/blog/2013/01/20/cocoapods-creating-a-pod-spec/

pod install 命令时会引发许多操作。要想深入了解这个命令执行的详细内容,可以在这个命令后面加上 --verbose

 90、背景图片按照某个像素拉伸

  self.messageImage.image = [[UIImage imageNamed:@"bbs_meaasge_frame"] stretchableImageWithLeftCapWidth:150 topCapHeight:20];

 

© 著作权归作者所有

共有 人打赏支持
冰泪_
粉丝 15
博文 81
码字总数 52550
作品 0
青浦
程序员
如何判断你是合格的高级iOS开发工程师?

前言 随着移动互联网的高速发展泄洪而来,有意学习移动开发的人越来越多了,竞争也是越来越大,需要学习的东西很多。如何才能在激烈的移动开发者竞争中一枝独秀,成为一名真正合格的高级iOS...

_小迷糊
05/26
0
0
说说 NSTimer 的新 API

本文是我首发在iOS知识小集团队的,欢迎关注微博话题#ios知识小集#。 在以往的 iOS 版本中,我们为了避免 NSTimer 的循环引用问题,一个比较常用的解决办法是为 NSTimer 添加一个 category,...

halohily
05/03
0
0
那些在学习iOS开发前就应该知道的事(part 1)

英文原文:Things I wish I had known before starting iOS development—Part 1 设计师设计出来了一个不错的引导界面,然而当我看到设计稿的时候,我们的app也没几天就要上线了。这个界面模...

TomatosX
2015/06/12
0
0
iOS动画效果合集、飞吧企鹅游戏、换肤方案、画板、文字效果等源码

iOS精选源码 动画知识运用及常见动画效果收集(http://www.code4app.com/thread-13354-1-1.html) 3D卡片拖拽卡片叠加卡片(http://www.code4app.com/thread-30475-1-1.html) iFIERO - FLYING P......

sunnyaigd
07/18
0
0
iOS精美过度动画、视频会议、朋友圈、联系人检索、自定义聊天界面等源码

iOS精选源码 iOS 精美过度动画源码(http://www.code4app.com/thread-14827-1-1.html) iOS简易聊天页面以及容联云IM自定义聊天页面的实现思路(http://www.code4app.com/thread-30348-1-1.htm...

sunnyaigd
07/11
0
0

没有更多内容

加载失败,请刷新页面

加载更多

20181018 上课截图

![](https://oscimg.oschina.net/oscnet/49f66c08ab8c59a21a3b98889d961672f30.jpg) ![](https://oscimg.oschina.net/oscnet/a61bc2d618b403650dbd4bf68a671fabecb.jpg)......

小丑鱼00
58分钟前
1
0
WinDbg

参考来自:http://www.cnit.net.cn/?id=225 SRV*C:\Symbols*http://msdl.microsoft.com/download/symbols ctrl + d to open dump_file Microsoft (R) Windows Debugger Version 6.12.0002.633......

xueyuse0012
今天
2
0
OSChina 周五乱弹 —— 想不想把92年的萝莉退货

Osc乱弹歌单(2018)请戳(这里) 【今日歌曲】 @罗马的王:分享松澤由美的单曲《地球ぎ》 很久没看圣斗士星矢了 《地球ぎ》- 松澤由美 手机党少年们想听歌,请使劲儿戳(这里) @开源中国首...

小小编辑
今天
16
2
springBoot条件配置

本篇介绍下,如何通过springboot的条件配置,控制Bean的创建 介绍下开发环境 JDK版本1.8 springboot版本是1.5.2 开发工具为 intellij idea(2018.2) 开发环境为 15款MacBook Pro 前言 很多时候,...

贺小五
今天
1
0
javascript source map 的使用

之前发现VS.NET会为压缩的js文添加一个与文件名同名的.map文件,一直没有搞懂他是用来做什么的,直接删除掉运行时浏览器又会报错,后来google了一直才真正搞懂了这个小小的map文件背后的巨大...

粒子数反转
昨天
1
0

没有更多内容

加载失败,请刷新页面

加载更多

返回顶部
顶部