KVCKVO

KVC  后边附有源码

类似的用法

[user1 setValue:@"令狐冲" forKey:@"name"];

[user1 setValue:@"武当"forKeyPath:@"menpai.name"];//中间有路径过程

 NSLog(@"menpai:%@",[user1 valueForKeyPath:@"menpai.name"]);

 [user1 setValuesForKeysWithDictionary:dic];//dictionary和user1的属性要一致

/KVO

    //self 去监听 user1.name 是否发生变化

    [user1 addObserver:selfforKeyPath:@"name"options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNewcontext:NULL];

    user1.name = @"任盈盈";

//如果user1.name 发生变化就会调用

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{

    NSLog(@"%@的值变成了%@",keyPath,[change objectForKey:@"new"]);

}

源码：http://download.csdn.net/detail/chenscda/7135107