catagory添加属性 

 1 #import <Foundation/Foundation.h>
 2 #import <objc/runtime.h>
 3 
 4 @interface NSObject (CategoryWithProperty)
 5 
 6 /**
 7  *  要在Category中扩展的属性
 8  */
 9 @property (nonatomic, strong) NSObject *property;
10 
11 @end
12 
13 @implementation NSObject (CategoryWithProperty)
14 
15 - (NSObject *)property {
16     return objc_getAssociatedObject(self, @selector(property));
17 }
18 
19 - (void)setProperty:(NSObject *)value {
20     objc_setAssociatedObject(self, @selector(property), value, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
21 }
22 
23 @end

 

posted @ 2016-02-25 17:39  PFY  阅读(193)  评论(0)    收藏  举报