动画的麻烦

Question

我有一点问题，我有一个带有webview和一些按钮的viewcontroller，我想在webview中应用一个curl动画，如果是同一个控制器，请查看instad webview视图。

像这样

而不是这个

在第一种情况下我使用webview.hidden = YES但是当我尝试回来时，视图是（obviusly）hidde，如果我把webview.hidden = NO放在方法上来回来我得到这个

任何解决方案？

这是我的代码：

- (IBAction)toggleView:(id)sender {


    CATransition *animation = [CATransition animation];
    [animation setDelegate:self.view];
    [animation setDuration:0.7];
    [animation setTimingFunction:UIViewAnimationCurveEaseInOut];

    animation.type = @"pageCurl";
    animation.fillMode = kCAFillModeForwards;
    animation.endProgress = 0.7;

    [animation setRemovedOnCompletion:NO];
    [[self.vistaWeb layer] addAnimation:animation forKey:@"pageCurlAnimation"];

}

- (IBAction) torna {

    CATransition *animation = [CATransition animation];
    [animation setDelegate:self.view];
    [animation setDuration:0.7];
    [animation setTimingFunction:UIViewAnimationCurveEaseInOut];

    animation.type = @"pageCurl";
    animation.fillMode = kCAFillModeBackwards;
    animation.startProgress = 0.7;
    animation.endProgress = 0;

    [animation setRemovedOnCompletion:NO];  
    [[self.vistaWeb layer] addAnimation:animation forKey:@"pageCurlAnimation"];
}