IOS 实现UIAlertView弹出动画

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

02

03	CAKeyframeAnimation * animation;

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

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06	animation.duration = dur;

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08	//animation.delegate = self;

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10	animation.removedOnCompletion = NO;

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12	animation.fillMode = kCAFillModeForwards;

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14	NSMutableArray *values = [NSMutableArray array];

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

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

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

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

23

24	animation.values = values;

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

27

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

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}