动画CATransition 从下往上、从上往下

动画 从下往上、从上往下//从下往上    CATransition *animation = [CATransitionanimation];    animation.duration = 0.4f;    animation.timingFunction = UIViewAnimationCurveEaseInOut;animation.fillMode = kCAFillModeForwards;    animation.type = kCATransitionPush;    animation.subtype = kCATransitionFromBottom;    [self.car.layeraddAnimation:animation forKey:@"animation"];