Question

我有一个以纵向锁定的viewcontroller（带有子视图控制器），使用以下代码来实现此目的：

- (UIInterfaceOrientationMask) supportedInterfaceOrientations {
    if ([self.centerViewController respondsToSelector:@selector(supportedInterfaceOrientations)]) {
        return [self.centerViewController supportedInterfaceOrientations];
    }
    return UIInterfaceOrientationMaskAll;
}

这非常有效，如果我需要锁定该视图，我可以“覆盖”当前centerViewController中的supportedInterfaceOrientations，如果我希望视图支持所有内容，请将其保留。

问题是锁定的视图在导航时不会旋转到支持的方向。一个视图以纵向方式锁定，但在横向显示另一个视图并导航到此视图时，即使此视图不支持横向，也会以横向显示该视图。

如何在导航时确保视图旋转到允许的方向？

Answer 1

如果您在supportedInterfaceOrientations中返回了支持的方向，我将自动轮换。

#pragma mark - Orientation Handling
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (BOOL)shouldAutorotate {// iOS 6 autorotation fix
    return YES;
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {// iOS 6 autorotation fix
    return UIInterfaceOrientationMaskLandscapeLeft;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {// iOS 6 autorotation fix
    return UIInterfaceOrientationPortrait;
}

- (void) willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
    if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {
    }
}

Answer 2

在AppDelegate.h

中添加以下属性

@property (readwrite) BOOL restrictRotation;

在AppDelegate.m

中添加以下代码

-(NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    if(self.restrictRotation)
        return UIInterfaceOrientationMaskLandscape;
    else
        return UIInterfaceOrientationMaskPortrait;
}

在ViewController.m中添加以下要限制方向的代码：

-(BOOL)shouldAutorotate
{
    return NO;
}

-(void) restrictRotation:(BOOL) restriction
{
    AppDelegate* appDelegate = (AppDelegate*)[UIApplication sharedApplication].delegate;
    appDelegate.restrictRotation = restriction;
}

- (NSUInteger) supportedInterfaceOrientations {
    // Return a bitmask of supported orientations. If you need more,
    // use bitwise or (see the commented return).
    return UIInterfaceOrientationMaskLandscape;
    // return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    //  (iOS 6)
    //  Prefer (force) landscape
    return UIInterfaceOrientationLandscapeRight;
}

当您从Landscape ViewController.m离开时，请进行以下函数调用

[self restrictRotation:NO];

希望我能解决你的问题。

如何在导航到UIViewController时将其旋转到支持的界面方向？

2 个答案: