iOS-CATransiton动画效果

 CATransiton

CATransiton官方提供4种动画效果，分别为：

NSString * const kCATransitionFade;//渐渐消失

NSString * const kCATransitionMoveIn;//覆盖进入

NSString * const kCATransitionPush;//推出

NSString * const kCATransitionReveal;//与MoveIn相反

例子：

view plain

CATransition *animation = [CATransition animation];//初始化动画 

animation.duration = 0.5f;//间隔的时间 

animation.timingFunction = UIViewAnimationCurveEaseInOut; 

animation.type = kCATransitionPush;//设置上面4种动画效果 

animation.subtype = kCATransitionFromTop;//设置动画的方向，有四种，分别为kCATransitionFromRight、kCATransitionFromLeft、kCATransitionFromTop、kCATransitionFromBottom 

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