为什么PageControl项目中没有动画?

时间:2009-11-01 04:51:01

标签: iphone cocoa-touch uiscrollview uipagecontrol

我正在使用Apple的开发网站上的PageControl项目。我在项目中添加了一个翻转视图,并在每个视图/页面的右上角添加了一个信息图标。出于某种原因,只有第一页能够为翻动设置动画。第2页仍显示翻页但不动画。为了确保第1页没有什么特别之处,我切换了第1页和第2页,并且工作正常。位置1中的第2页是动画,而位置2中的第1页则没有。任何想法为什么会发生这种情况或我如何解决它?

我确实看过这个帖子,这似乎是同一个问题:Flip View Iphone。但是,我的flipview是一个UIViewController,因此是带有信息图标的类。在另一个线程中,他们使用的是UIViews。

我确实从上面的线程实现了showInfo代码。在第2页上,我看不到翻转。然后我滚动到第1页,看到它已翻转。不知道为什么它不会停留在第2页。当在第1页时,它没有动画翻转。翻转视图突然出现了。

1 个答案:

答案 0 :(得分:1)

你有一个containerView吗?可以存在的东西,以便您可以添加和删除子视图?如果你有两个viewControllers,一个进入,一个进行,没有containerView,动画可能会中断。我使用rootViewController并使用后面的rootViewcontroller为我和我的所有页面设置动画。这是我的翻转代码,你可能需要做一些编辑才能让它适合你:

(请记住,self是rootViewcontroller,一个带有空白视图的viewcontroller(颜色与视图匹配))

- (void)switchTwoViews:(UIViewController *)view1 otherView:(UIViewController *)view2
{
    /*
     This method is called to switch views.
     It flips the displayed view from the main view to the flipside view and vice-versa.
     */

    UIViewController *coming = nil;
    UIViewController *going = nil;
    UIViewAnimationTransition transition;

    [view1.view setUserInteractionEnabled: NO];
    [view2.view setUserInteractionEnabled: NO];
    if (view1.view.superview == nil) {
        coming = view1;
        going = view2;
        transition = UIViewAnimationTransitionFlipFromLeft;
    }
    else {
        coming = view2;
        going = view1;
        transition = UIViewAnimationTransitionFlipFromRight;
    }
        // in some cases the following is needed to size the view
    //  coming.view.frame = [UIScreen mainScreen].applicationFrame;

    //  going.view.alpha = 1.0;     //uncomment these lines if we want fading of views
    //  coming.view.alpha = 0.0;

    NSArray *viewArray = [[NSArray alloc] initWithObjects:coming, going, nil];
    [coming viewWillAppear:YES];
    [going viewWillDisappear:YES];
    [UIView beginAnimations:@"View Flip" context:viewArray]; {
        [UIView setAnimationDuration:1.0];
        [UIView setAnimationDelegate:self];
        [UIView setAnimationDidStopSelector:@selector(animationDidEnd:finished:context:)];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];

        //      coming.view.alpha = 1.0;        //uncomment these lines if we want fading of views
        //      going.view.alpha = 0.0;

        [UIView setAnimationTransition:transition forView:self.view cache:YES];
        [self.view addSubview: coming.view];
    }
    [UIView commitAnimations];

}

- (void) animationDidEnd:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context
{
    NSArray *viewArray = context;
    [((UIViewController *)[viewArray objectAtIndex:1]).view removeFromSuperview];
    [[viewArray objectAtIndex:1] viewDidDisappear:YES];
    [[viewArray objectAtIndex:0] viewDidAppear:YES];
    [[[viewArray objectAtIndex:0] view] setUserInteractionEnabled: YES];
    [viewArray release];
}
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