iOS-addSubView时给UIView添加效果

CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
animation.duration = 1;
NSMutableArray *values = [NSMutableArray array];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 0.1, 1.0)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.9, 0.9, 0.1)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)]];
animation.values = values;
[self.preferView.layer addAnimation:animation forKey:nil];