iOS隐藏和取消隐藏状态栏不能正确移动子视图

时间:2013-03-03 21:25:22

标签: ios user-interface statusbar uiinterfaceorientation

我有一个自定义视图控制器,可以包含两个子视图控制器。当设备处于纵向时,其中一个控制器的视图可见。当设备处于横向时,其他控制器的视图可见。但是,当横向方向视图可见时,状态栏将缩回以为特定视图腾出更多空间。设备重新进入纵向模式后,状态栏将取消显示。这是自定义视图控制器显示在UINavigationController

我的问题是,当状态栏的可见性发生变化时,我的子视图无法正确调整。当您以不同方向转动设备时,最终会出现较大的间隙和/或重叠,如下图所示: enter image description here

正如您所看到的,它最初很好(纵向),但是当设备转动时,状态栏就会出现白色间隙。当设备转回纵向时,UINavigationController的导航栏将被状态栏调出并重叠,导航栏与其下方视图之间会出现间隙。如果您可以非常快速地从一个横向方向旋转180度到相反的横向方向,则间隙消失并且看起来很好。

下面的方法属于自定义视图控制器,在willAnimateRotationToInterfaceOrientation:duration:中调用(显然是为了处理旋转事件)和viewDidAppear:(用于处理从导航中的上一个视图控制器推入视图的时间)栈)。

- (void)cueAnimationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation fromViewDidAppear:(BOOL) fromViewDidAppear
{
    // Fading animation during orientation flip.
    // Make sure its not already animating before trying.
    BOOL barHidden =  [UIApplication sharedApplication].statusBarHidden;
    if (!isAnimating) {
        BOOL alreadyGoodGrid = (UIInterfaceOrientationIsLandscape(interfaceOrientation) && curView == self.gridViewController.view);
        BOOL alreadyGoodTable = (UIInterfaceOrientationIsPortrait(interfaceOrientation) && curView == self.tableViewController.view);
        if ((alreadyGoodGrid && barHidden) ||
            (alreadyGoodTable && !barHidden)) {
            // If views are the way they should be for this orientation. Don't do
            // anything.
            return;
        }
        isAnimating = YES;
        UIView *nextView;
        // Get starting orientation. This will determine what view goes on top
        if (UIInterfaceOrientationIsLandscape(interfaceOrientation))
            nextView = self.gridViewController.view;
        else
            nextView = self.tableViewController.view;

        if (nextView == self.tableViewController.view)
        {
            if (!alreadyGoodTable)
            {
                self.tableViewController.view.alpha = 0.0;
                [self.view bringSubviewToFront:self.tableViewController.view];
            }
            // Unhide the bar for the table view
            [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationSlide];
        }
        else // gridViewController
        {
            if (!alreadyGoodGrid)
            {
                self.gridViewController.view.alpha = 0.0;
                [self.view bringSubviewToFront:self.gridViewController.view];
            }
            // Hide the bar for the grid view
            [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationSlide];
        }
        [UIView animateWithDuration:0.4
                              delay: 0.0
                            options: UIViewAnimationOptionAllowUserInteraction
                         animations:^{
                             if (nextView == self.tableViewController.view) {
                                 self.tableViewController.view.alpha = 1.0;
                             }
                             else {
                                 self.gridViewController.view.alpha = 1.0;
                             }                             
                         }
                         completion:^(BOOL finished) {
                             if (nextView == self.tableViewController.view) {
                                 curView = self.tableViewController.view;
                             }
                             else {
                                 curView = self.gridViewController.view;
                             }
                             isAnimating = NO;
                         }];
    }
}

非常感谢任何可以花时间看这个的人。

5 个答案:

答案 0 :(得分:2)

很多人似乎都有这个问题,就像我一样,还有其他Q / A线程,你应该搜索它 - 我可能永远找不到神奇的答案。在某些情况下,您可能会尝试“修复”问题的一个问题是当您将条形图可见性更改为(重新)显示状态栏时:

  • 隐藏导航栏。
  • 取消隐藏状态栏。
  • 取消隐藏导航栏。

如果您隐藏状态栏,则隐藏,隐藏,取消隐藏。

有时人们发现在取消隐藏导航栏之前需要稍微延迟 - 所以在异步调度块中这样做是为了在下一个runloop上运行。类似的东西:

dispatch_async(dispatch_get_main_queue(), ^{
        [self.navigationController setNavigationBarHidden:NO animated:NO];
});

答案 1 :(得分:0)

在摆弄了很多东西后,我似乎想出了某种解决方案。它似乎没有失败。

这是我的代码:

- (void)cueAnimationToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation fromViewDidAppear:(BOOL) fromViewDidAppear
{
    // Fading animation during orientation flip.
    // Make sure its not already animating before trying.
    BOOL barHidden =  [UIApplication sharedApplication].statusBarHidden;
    if (!isAnimating) {
        BOOL alreadyGoodGrid = (UIInterfaceOrientationIsLandscape(interfaceOrientation) && curView == self.gridViewController.view);
        BOOL alreadyGoodTable = (UIInterfaceOrientationIsPortrait(interfaceOrientation) && curView == self.tableViewController.view);
        if ((alreadyGoodGrid && barHidden) ||
            (alreadyGoodTable && !barHidden)) {
            // If views are the way they should be for this orientation. Don't do
            // anything.
            return;
        }
        isAnimating = YES;
        UIView *nextView;
        // Get starting orientation. This will determine what view goes on top
        if (UIInterfaceOrientationIsLandscape(interfaceOrientation))
            nextView = self.gridViewController.view;
        else
            nextView = self.tableViewController.view;

        if (nextView == self.tableViewController.view)
        {
            if (!alreadyGoodTable)
            {
                self.tableViewController.view.alpha = 0.0;
                [self.view bringSubviewToFront:self.tableViewController.view];
            }
            [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationSlide];
        }
        else
        {
            if (!alreadyGoodGrid)
            {
                self.gridViewController.view.alpha = 0.0;
                [self.view bringSubviewToFront:self.gridViewController.view];
            }
            [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationSlide];
        }
        [UIView animateWithDuration:0.4
                              delay: 0.0
                            options: UIViewAnimationOptionAllowUserInteraction
                         animations:^{
                             CGRect r = self.navigationController.navigationBar.frame;
                             if (nextView == self.tableViewController.view) {
                                 self.tableViewController.view.alpha = 1.0;
                                 self.navigationController.navigationBar.frame = CGRectMake(0.0, 20.0, r.size.width, r.size.height);
                                 self.view.frame = CGRectMake(0.0, 20.0, self.view.frame.size.width, self.view.frame.size.height - 20.0);

                             }
                             else {
                                 self.gridViewController.view.alpha = 1.0;
                                 self.navigationController.navigationBar.frame = CGRectMake(0.0, 0.0, r.size.width, r.size.height);
                                 double y = 0.0, h = 0.0;
                                 if (fromViewDidAppear)
                                 {
                                     y = -20.0;
                                     h = 20.0;
                                 }
                                 self.view.frame = CGRectMake(0.0, y, self.view.frame.size.width, self.view.frame.size.height + h);
                             }                             
                         }
                         completion:^(BOOL finished) {
                             if (nextView == self.tableViewController.view) {
                                 curView = self.tableViewController.view;
                             }
                             else {
                                 curView = self.gridViewController.view;
                             }
                             isAnimating = NO;
                         }];
    }
}

我所做的是检查是从viewDidAppear:还是在其他地方调用该方法(在这种情况下只有willAnimateRotationToInterfaceOrientation:duration:)。根据谁调用该方法,事情的行为会有所不同。在任何一种情况下,我都会调整self.view.frameself.navigationController.navigationBar.frame以考虑状态栏位置的差异。当我们来自viewDidAppear:时,我需要输入状态栏高度的负y值,以使子视图正确向上移动。这似乎似乎都很有效。

答案 2 :(得分:0)

状态栏和导航栏重叠隐藏后再次显示,我遇到了同样的问题。我在github here上找到了一个解决方案(参见showUI方法),我根据自己的需要进行了修改。

- (void)toggleNavBar:(BOOL)hide
{    
    navBarHidden = hide;

    //Fade status bar
    [[UIApplication sharedApplication] setStatusBarHidden:hide 
                                            withAnimation:UIStatusBarAnimationFade];

    //Fade navigation bar
    [UINavigationBar beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.3]; // Approximately the same time the status bar takes to fade.

    self.navigationController.navigationBar.alpha = hide ? 0 : 1;

    [UINavigationBar commitAnimations];

    // Being invisible messes with the position of the navigation bar, every time it gets 
    // visible we need to set it to the correct y-offset (just below the status bar)
    [self adjustNavBarOrigin];
}

-(void)adjustNavBarOrigin
{
    CGRect r = self.navigationController.navigationBar.frame;
    r.origin.y = 20; //Height of the statusbar, can't find a reliable method in the SDK to get this value
    self.navigationController.navigationBar.frame = r;   
}

答案 3 :(得分:0)

对于ios7,覆盖prefersStatusBarHidden

- (BOOL)prefersStatusBarHidden {
    return NO if landscape and NO if landscape;
}

关于方向更改调用下面的函数来触发prefersStatusBarHidden函数

[self setNeedsStatusBarAppearanceUpdate];

请参阅https://stackoverflow.com/a/19194901/1939554

中的详细答案

答案 4 :(得分:0)

这解决了我的问题:

self.automaticallyAdjustsScrollViewInsets = false
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