通知   

KVO(

Key-Value Observing)

NSString *value = [NSStringstringWithFormat:@"%d",(int)_mySlider.value];

NSLog(@"%@",[selfvalueForKeyPath:@"myTxt.text"]);

NSString *keyPath = @"myTxts.text";

[ self   setValue :value  forKeyPath :keyPath];

 

 

KVC(

Key-Value Coding)

 

===========1:

// 加一个检测textFiled 的

 

    [self addObserver:selfforKeyPath:@"myTxt.text"options:

      NSKeyValueObservingOptionOld || NSKeyValueObservingOptionNew context:nil];

===========2:

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

{

    NSLog(@"1");

    NSLog(@"%@",change);

}

 

适配器模式

协议