IOS 实现UIAlertView弹出动画

+(void)exChangeOut:(UIView *)changeOutView dur:(CFTimeInterval)dur{

02 

03    CAKeyframeAnimation * animation;

04    animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];

05 

06    animation.duration = dur;

07 

08    //animation.delegate = self;

09 

10    animation.removedOnCompletion = NO;

11 

12    animation.fillMode = kCAFillModeForwards;

13 

14    NSMutableArray *values = [NSMutableArray array];

15 

16    [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.1, 0.1, 1.0)]];

17 

18    [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.2, 1.2, 1.0)]];

19 

20    [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.9, 0.9, 0.9)]];

21 

22    [values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)]];

23 

24    animation.values = values;

25 

26    animation.timingFunction = [CAMediaTimingFunction functionWithName: @"easeInEaseOut"];

27 

28    [changeOutView.layer addAnimation:animation forKey:nil];

29 

30}