1. UIView *zanView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
   
2. zanView.backgroundColor = [UIColor redColor];
   
3. [self.view addSubview:zanView];
   
4. [UIView animateWithDuration:0.3 animations:^{
   
5.     zanView.transform = CGAffineTransformMakeScale(1.2, 1.2);
   
6. } completion:^(BOOL finished) {
   
7.     [UIView animateWithDuration:0.3 animations:^{
   
8.         zanView.transform = CGAffineTransformMakeScale(0.9, 0.9);
   
9.     } completion:^(BOOL finished) {
   
10.         [UIView animateWithDuration:0.3 animations:^{
    
11.             zanView.transform = CGAffineTransformMakeScale(1.0, 1.0);
    
12.         } completion:^(BOOL finished) {
    
13.             
    
14.         }];
    
15.     }];
    
16. }];

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1. UIView *zanView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
   
2. zanView.backgroundColor = [UIColor redColor];
   
3. [self.view addSubview:zanView];
   
4. [UIView animateWithDuration:0.3 animations:^{
   
5.     zanView.transform = CGAffineTransformMakeScale(1.2, 1.2);
   
6. } completion:^(BOOL finished) {
   
7.     [UIView animateWithDuration:0.3 animations:^{
   
8.         zanView.transform = CGAffineTransformMakeScale(0.9, 0.9);
   
9.     } completion:^(BOOL finished) {
   
10.         [UIView animateWithDuration:0.3 animations:^{
    
11.             zanView.transform = CGAffineTransformMakeScale(1.0, 1.0);
    
12.         } completion:^(BOOL finished) {
    
13.             
    
14.         }];
    
15.     }];
    
16. }];

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