Question

我的iPhone应用程序仅支持纵向方向。我想添加到仅支持横向方向的项目视图控制器？可能吗？如果是的话我怎么能实现呢？

我试图像这样包装类别文件：

@implementation UINavigationController (Rotation_IOS7)

-(BOOL)shouldAutorotate
    {

        return YES;

    }

    -(NSUInteger)supportedInterfaceOrientations
    {

      return UIInterfaceOrientationMaskLandscape;

    }

如果我这样做，我会收到此错误：由于未捕获的异常UIApplicationInvalidInterfaceOrientation而终止应用，原因为：Supported orientations has no common orientation with the application, and shouldAutorotate is returning YES

Answer 1

我试过这个并且它有效：http://www.sebastianborggrewe.de/only-make-one-single-view-controller-rotate/

首先，将这些代码添加到AppDelegat类中。

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
// Get topmost/visible view controller
UIViewController *currentViewController = [self topViewController];

// Check whether it implements a dummy methods called canRotate
if ([currentViewController respondsToSelector:@selector(canRotate)]) {
    // Unlock landscape view orientations for this view controller
    return UIInterfaceOrientationMaskAllButUpsideDown;
}

// Only allow portrait (standard behaviour)
return UIInterfaceOrientationMaskPortrait;
}

- (UIViewController*)topViewController {
  return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}

- (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController {
  if ([rootViewController isKindOfClass:[UITabBarController class]]) {
    UITabBarController* tabBarController = (UITabBarController*)rootViewController;
    return [self topViewControllerWithRootViewController:tabBarController.selectedViewController];
  } else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
    UINavigationController* navigationController = (UINavigationController*)rootViewController;
    return [self topViewControllerWithRootViewController:navigationController.visibleViewController];
  } else if (rootViewController.presentedViewController) {
    UIViewController* presentedViewController = rootViewController.presentedViewController;
    return [self topViewControllerWithRootViewController:presentedViewController];
  } else {
    return rootViewController;
  }
}

然后，在横向视图控制器中，添加此方法

- (void)canRotate { }

Answer 2

我搜索了很多主题，最后找到了一个有效的解决方案。

在我的例子中，我有两个VC：

A - ＆gt;嵌入在Nav中的VC。控制器，应该只支持纵向视图。

B - ＆gt; VC未嵌入VC中且仅支持Landscape。

我想从视图A到视图B（通过按下按钮）然后返回查看A然后具有特定方向的A仍然正确。

予。为UINavigationController创建一个类别，并在其.m文件中写入以下内容:(代码将自动调用）

- (NSUInteger)supportedInterfaceOrientations
{
    NSLog(@"supportedInterfaceOrientations = %d ", [self.topViewController         supportedInterfaceOrientations]);

    return [self.topViewController supportedInterfaceOrientations];
}

- (BOOL)shouldAutorotate
{
    return self.topViewController.shouldAutorotate;
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{
    // You do not need this method if you are not supporting earlier iOS Versions

    return [self.topViewController shouldAutorotateToInterfaceOrientation:interfaceOrientation];
}

II。在A和B之间创建一个模态segue，然后在B和A之间创建另一个模式segue。

III。在每个View Controllers .m文件中记下以下内容：

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscape;
}

OR

- (NSUInteger)supportedInterfaceOrientations
    {
        return UIInterfaceOrientationMaskPortrait;
    }

添加此代码后。您将能够更改单个视图B的方向。

Answer 3

编辑：

在.h中创建一个类别，然后实现这些方法

在视图控制器中使用这些方法，以支持格局

@implementation UINavigationController (Rotation_IOS7)

-(BOOL)shouldAutorotate
    {

        return YES;

    }

    -(NSUInteger)supportedInterfaceOrientations
    {

      return UIInterfaceOrientationMaskLandscape;

    }

iOS 7.仅为一个视图控制器更改页面方向

3 个答案: