- (void)viewDidLoad {
   [super viewDidLoad];
   // Do any additional setup after loading the view, typically from a nib.
   
   self.view.backgroundColor = [UIColor whiteColor];
   
   // UIView 添加 Block 事件：
   UIView *view = [[UIView alloc] initWithFrame:CGRectMake(50, 100, 100, 100)];    
   view.backgroundColor = [UIColor blueColor];
   [self.view addSubview:view];
   [view addActionWithblock:^{
       NSLog(@"view 被点击 ......\n");
   }];
   
   //UILabel  添加 Block 事件：    	   	
   UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(180, 100, 100, 100)];
   label.backgroundColor = [UIColor redColor];
   [self.view addSubview:label];
   [label addActionWithblock:^{
       NSLog(@"label 被点击 ......\n");
   }];
   
   // UIImageView  添加 Block 事件：
   UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(50, 250, 100, 100)];
   imageView.backgroundColor = [UIColor purpleColor];
   [self.view addSubview:imageView];
   [imageView addActionWithblock:^{
       NSLog(@"imageView 被点击 ......\n");
   }];
   
   // UIImageView  添加 Target-Action 事件：
   UIImageView *imageView2 = [[UIImageView alloc] initWithFrame:CGRectMake(180, 250, 100, 100)];
   imageView2.backgroundColor = [UIColor brownColor];
   [self.view addSubview:imageView2];
   [imageView2 addTarget:self action:@selector(imageDidSelcte:)];
}

- (void)imageDidSelcte:(id)sender
{
   NSLog(@" targetAction label 被点击 ......\n");
}