自定义简单的转场动画

在视图控制器中点击导航栏按钮，实现导航栏按钮和页面的转场动画

//设置点击导航栏按钮事件- (void)buttonAction:(UIButton *)button {    //取得导航项的父视图    UIView *superView = self.navigationItem.rightBarButtonItem.customView;    UIButton *button1 = (UIButton *)[superView viewWithTag:101];    UIButton *button2 = (UIButton *)[superView viewWithTag:102];    //将按钮的hidden值取反    button1.hidden = !button1.hidden;    button2.hidden = !button2.hidden;    //将视图的hidden值取反    _tableView.hidden = !_tableView.hidden;    _posterView.hidden = !_posterView.hidden;    //设置转场动画的值    UIViewAnimationTransition animation = button1.hidden ? UIViewAnimationTransitionFlipFromLeft : UIViewAnimationTransitionFlipFromRight;    [self flipViewWithAnimation:animation WithView:superView];    [self flipViewWithAnimation:animation WithView:self.view];}//转场动画- (void)flipViewWithAnimation:(UIViewAnimationTransition)animation WithView:(UIView *)view {    //开始动画    [UIView beginAnimations:nil context:nil];    //动画时间    [UIView setAnimationDuration:.35];    //转场动画    [UIView setAnimationTransition:animation forView:view cache:YES];    //结束动画    [UIView commitAnimations];}