代理的使用

MyView.h

 @protocal ViewTouchDelegate<NSObject>

  @required

  -(void)touchMyView;

 @end

 

{

　　id<ViewTouchDelegate>delegate;

}

@property (nonamtic,assign)id<ViewTouchDelegate>delegate;

 

-(void)touchMyView;

 

 

MyView.m

-(id)init

{

　　self =[super init];

　　if(self)

       {

 

NSTimer *timer =[NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(touchMyView) userInfo:nil repeats:YES];

        [timer fire];

       }     

　　return self;

}

 

-(void)touchMyView

{

　　delegate =_delegate;

 

　　if([_delegate conformsToProtocal:@protocal(ViewTouchDelegate)])

　　{

　　  if([_delegate respondsToSelector:@selector(touchMyView)])

　　　　{

　　　　　　[_delegate touchMyView];

            }

       }

}

 

 

MyViewController.h

#import "MyView.h"

@interface MyViewController:UIViewController <ViewTouchDelegate>

 

MyViewController.m

-(void)viewDidLoad

{

　　[super viewDidLoad];

　　MyView *_myView =[[MyView alloc]init];

　　_myView.frame =CGRectMake(0,0,100,100);

　　_myView.delegate=self;

　　[self.view addSubView:_myView];

}

 

-(void)touchMyView

{

　　NSLog(@"Delegate is doing things");

}