自定义对话框AlterView

- (void)show;

{

self.hidden = NO;

CAKeyframeAnimation *animation = [CAKeyframeAnimation

animationWithKeyPath:@"transform"];

CATransform3D scale1 = CATransform3DMakeScale(0.5, 0.5, 1);

CATransform3D scale2 = CATransform3DMakeScale(0.8, 0.8, 1);

CATransform3D scale3 = CATransform3DMakeScale(0.9, 0.9, 1);

CATransform3D scale4 = CATransform3DMakeScale(1.0, 1.0, 1);

NSArray *frameValues = [NSArray arrayWithObjects:

[NSValue valueWithCATransform3D:scale1],

[NSValue valueWithCATransform3D:scale2],

[NSValue valueWithCATransform3D:scale3],

[NSValue valueWithCATransform3D:scale4],

nil];

[animation setValues:frameValues];

NSArray *frameTimes = [NSArray arrayWithObjects:

[NSNumber numberWithFloat:0.0],

[NSNumber numberWithFloat:0.5],

[NSNumber numberWithFloat:0.9],

[NSNumber numberWithFloat:1.0],

nil];

[animation setKeyTimes:frameTimes];

animation.fillMode = kCAFillModeForwards;

animation.removedOnCompletion = NO;

animation.duration = .2;

[self.layer addAnimation:animation forKey:@"popup"];

}

- (void)dissmiss;

{

self.hidden = YES;

CAKeyframeAnimation *animation = [CAKeyframeAnimation

animationWithKeyPath:@"transform"];

CATransform3D scale1 = CATransform3DMakeScale(1.0, 1.0, 1);

CATransform3D scale2 = CATransform3DMakeScale(0.7, 0.7, 1);

CATransform3D scale3 = CATransform3DMakeScale(0.3, 0.3, 1);

CATransform3D scale4 = CATransform3DMakeScale(0, 0, 1);