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)

       {

  　　  [self touchMyView];

       }     

　　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");

}

代理的使用

原文：http://www.cnblogs.com/520myp1314/p/4418262.html