Question

我想在某些视图中禁用横向方向。

我已经覆盖了以下两种方法，但这些方法不会随时调用。

- (NSUInteger) supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskPortrait;
}

- (UIInterfaceOrientation) preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationPortrait;
}

我错过了什么吗？请帮帮我。

Answer 1

创建UINavigationController的子类并按以下方式覆盖这些方法：

- (NSUInteger)supportedInterfaceOrientations
{
    if([self.topViewController respondsToSelector:@selector(supportedInterfaceOrientationsForThisContorller)])
    {
        return(NSInteger)[self.topViewController performSelector:@selector(supportedInterfaceOrientationsForThisContorller) withObject:nil];
    }
    return UIInterfaceOrientationPortrait | UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight;
}

- (BOOL)shouldAutorotate
{
    if([self.visibleViewController respondsToSelector:@selector(shouldAutorotateNow)])
    {
        BOOL autoRotate = (BOOL)[self.visibleViewController
performSelector:@selector(shouldAutorotateNow)
                                 withObject:nil];
        return autoRotate;
    }
    return YES;
}

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}

并在您想要仅设置纵向方向的UIViewController类中使用以下方法

- (NSUInteger) supportedInterfaceOrientationsForThisContorller {
    // Return a bitmask of supported orientations. If you need more,
    // use bitwise or (see the commented return).
    return UIInterfaceOrientationMaskPortrait;
    // return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
}

-(BOOL)shouldAutorotateNow
{
    return YES;
}

Answer 2

查看this个答案。这家伙可能已经详细解释了代表们。

也试试，

- (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)
    {
        [self performSegueWithIdentifier:@"DisplayAlternateView" sender:self];
        isShowingLandscapeView = YES;
    }
    else if (UIDeviceOrientationIsPortrait(deviceOrientation) &&
             isShowingLandscapeView)
    {
        [self dismissViewControllerAnimated:YES completion:nil];
        isShowingLandscapeView = NO;
    }
}

Answer 3

你是否在你的代码中使用了下面的方法，但是这个supportedInterfaceOrientations不会被调用

- （BOOL）shouldAutorotate {
return YES; 
}

如何在iOS中禁用特定方向

3 个答案: