ios - 阻止旋转通知传播到 subview

Question

我正在使用设备方向通知来了解设备是否已旋转，以便我可以执行选择器。这是我正在使用的代码:

- (void)awakeFromNib
{
    isShowingLandscapeView = NO;
    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(orientationChanged:)
                                                 name:UIDeviceOrientationDidChangeNotification
                                               object:nil];
}

- (void)orientationChanged:(NSNotification *)notification
{
    UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation;
    if (UIDeviceOrientationIsLandscape(deviceOrientation) &&
        !isShowingLandscapeView)
    {
        [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade];
        [self performSegueWithIdentifier:@"landscape" sender:self];
        isShowingLandscapeView = YES;
    }
    else if (UIDeviceOrientationIsPortrait(deviceOrientation) &&
             isShowingLandscapeView)
    {
        [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationFade];
        [self dismissViewControllerAnimated:YES completion:nil];
        isShowingLandscapeView = NO;
    }
}

但是，当我导航到其他 subview 并旋转设备时，尽管上述代码位于一个独立于其他 View 所具有的类的类中，但仍会执行选择器。那我怎么能阻止呢？我试过:

[[UIDevice currentDevice] endGeneratingDeviceOrientationNotifications];

它也没有用。当设备旋转时，我的应用程序实际上会以横向模式弹出另一个 View 。所以在 subview 中，横向 View 出现在我旋转设备时。我该如何解决？

Answer 1

移除 UIDeviceOrientationDidChangeNotification

[[NSNotificationCenter defaultCenter] removeObserver:self name: UIDeviceOrientationDidChangeNotification object:nil];

删除所有通知

[[NSNotificationCenter defaultCenter] removeObserver:self];