간단한 젤리 탄동 애니메이션

  ：
 1 CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"];

 2     [animation setDuration:.6];

 3     NSMutableArray *values = [NSMutableArray array];

 4     [values addObject:[NSNumber numberWithFloat:1.0]];

 5     [values addObject:[NSNumber numberWithFloat:1.2]];

 6     [values addObject:[NSNumber numberWithFloat:1.0]];

 7     [values addObject:[NSNumber numberWithFloat:1.1]];

 8     [values addObject:[NSNumber numberWithFloat:1.0]];

 9     [animation setValues:values];

10     [animation setRemovedOnCompletion:YES];

11     [animation setAutoreverses:NO];

12     animation.timingFunction =[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

13     [_animationView.layer addAnimation:animation forKey:@"transform.scale"];

CAKeyframeAnimation을 사용한 애니메이션
그중애니메이션뷰는 애니메이션뷰를 실현하는 거예요.