一直认为像这样写会造成内存泄露呢！可是我好像真的错了。
NSString *textStr = @"abc";
if (YES) {
textStr = @"def";
}
NSLog(@"textStr is %@", textStr);
NSString *str = @"dddd";
while (YES) {
str = @"aaaaaaaaa";
NSLog(@"%@ %d", str, str.retainCount);
}
NSArray *array = @[@"dddd", @"dddd"];
while (YES) {
array = @[@"dddddddddd"];
NSLog(@"%@", array[0]);
}接下来又错了如下测试，
NSString *str = @"dddd";
while (YES) {
str = [[NSString alloc] initWithString:@"4321"];
NSLog(@"%@ %d", str, str.retainCount);
}另外这样写不会报错的。
NSString *str = @"dddd";
[str release];
NSLog(@"str is %@", str);
