仅允许在一个视图控制器上进行自动旋转

本文介绍了仅允许在一个视图控制器上进行自动旋转的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在我的项目中，我只允许纵向旋转，但对于一个 ViewController 我想启用横向。我将 ViewController 呈现为 ModalViewController ，我尝试使用方法 - （BOOL ）shouldAutorotateToInterfaceOrientation：（UIInterfaceOrientation）interfaceOrientation 或iOS 6方法，如 - （NSUInteger）supportedInterfaceOrientations 但实际上没有任何效果。虽然这些方法被调用，但视图没有旋转。

In my project I have allowed only portrait rotation, but for one ViewController I would like to enable also landscape. I'm presenting this ViewController as ModalViewController, I've tried using methods - (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation) interfaceOrientation or iOS 6 methods like -(NSUInteger) supportedInterfaceOrientations but nothing actually worked. The view didn't rotate although those methods got called.

在此之后，我试图通过听取这些通知的方式将其旋转：

After this I've tried to rotate it by myslef with listening to those notifications :

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didRotate:) name:UIDeviceOrientationDidChangeNotification object:nil];

但即使我能够手动旋转视图 in方法 didRotate ：它非常混乱，我无法旋转 StatusBar 。

but even though I was able to manually rotate the view in method didRotate: it's very messy and I can't rotate the StatusBar.

我真的很想使用像 shouldAutorotateToInterfaceOrientation 这样的标准方法，但我不知道怎么做。任何人？

I would really like to use standard methods like shouldAutorotateToInterfaceOrientation, but I don't know how. Anyone?

推荐答案

在你的app app.m中添加这个

Add this in your app delegate.m

# pragma mark - Rotation - (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window { if ([self.window.rootViewController isKindOfClass:[MVYSideMenuController class]]) { // Get topmost/visible view controller UIViewController *currentViewController = [self.window.rootViewController.childViewControllers lastObject]; // 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; } -(void)canRotate { }

然后添加此方法

-(void)canRotate { // just define the method, no code required here }

在每个ViewController（.m文件）中你想提供轮换。你也可以在这里包含 - （void）didRotateFromInterfaceOrientation：（UIInterfaceOrientation）fromInterfaceOrientation 方法在设备旋转时做出反应：

in every ViewController (.m files) where you want to provide rotation. You can also include here -(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation method to react when the device rotates:

-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation { UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]; switch (orientation) { case 1: case 2: //NSLog(@"portrait"); break; case 3: case 4: //NSLog(@"landscape"); break; default: //NSLog(@"other"); break; } }