IOS atomic与nonatomic,assign,copy与retain的定义和区别
http://blog.csdn.net/mars2639/article/details/7352540
https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/EncapsulatingData/EncapsulatingData.html#//apple_ref/doc/uid/TP30001163-CH17-SW1
http://blog.sina.com.cn/s/blog_63b4ee0d0101gi14.html
写一个setter方法用于完成@property (nonatomic,retain)NSString *name,写一个setter方法用于完成@property(nonatomic,copy)NSString *name
- (void) setName:(NSString*) str
{
[str retain];
[name release];
name = str;
}
- (void)setName:(NSString *)str
{
id t = [str copy];
[name release];
name = t;
}
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