下拉弹窗 pop push动画实现

- (void)popTitleView:(UIButton *)btn

{

if (popView.superview ==self.view) {

CATransition *animation =[CATransition animation];

animation.delegate=self;

animation.duration=0.3;

animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

animation.type=kCATransitionPush;

animation.subtype=kCATransitionFromTop;

[popView setAlpha:0.0f];

[popView.layer addAnimation:animation forKey:@"TSLocateView"];

[popView performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:0.3];

}else{

CATransition *animation =[CATransition animation];

animation.delegate=self;

animation.duration=0.3;

animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];

animation.type=kCATransitionPush;

animation.subtype=kCATransitionFromBottom;

[popView setAlpha:1.0f];

[popView.layer addAnimation:animation forKey:@"pushIn"];

[self.view addSubview:popView];

}

}