rotation - 在 iOS 8 中观看视频后出现内容偏移问题

Question

我有一个 TabBarController，支持InterfaceOrientations - UIInterfaceOrientationMaskPortrait。当我开始从其中一个选项卡观看视频、将设备旋转到横向，然后从全屏退出时，导航栏会在状态栏下方向上移动。为什么会发生这种情况以及如何解决？

Answer 1

这是一种黑客攻击，但在我的 View Controller 中有效，包含 UIWebView 和从

您会看到导航栏抖动，因为在视频全屏窗口消失后调用了 UIWindowDidBecomeHiddenNotification。

- (void)viewDidLoad
{
    [super viewDidLoad];
    // NOTE: I'm not sure, but MPMoviePlayerWillExitFullscreenNotification won't work
    // [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidBecomeHidden:) name:MPMoviePlayerDidExitFullscreenNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidBecomeHidden:) name:UIWindowDidBecomeHiddenNotification object:nil];
}

- (void)dealloc
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)windowDidBecomeHidden:(NSNotification *)notification
{
    UIView *navbar = self.navigationController.navigationBar;
    CGRect barFrame = navbar.frame;
    barFrame.origin.y = 20;
    self.navigationController.navigationBar.frame = barFrame;
    UIView *navbarBack = nil;
    for (UIView *view in navbar.subviews) {
        if ([NSStringFromClass([view class]) isEqual:@"_UINavigationBarBackground"]) {
            navbarBack = view;
            break;
        }
    }
    CGRect backFrame = navbarBack.frame;
    backFrame.origin.y = -20;
    backFrame.size.height = 64;
    navbarBack.frame = backFrame;
    [navbar.superview setNeedsLayout];
}


UIView *navbarBack = [navbar.subviews bk_match:^BOOL(UIView *view) {
    return [NSStringFromClass([view class]) isEqual:@"_UINavigationBarBackground"];
}];