我的 iPhone 应用程序仅支持纵向方向。我想添加到我的项目视图控制器中，该控制器仅支持横向方向？是否可以？如果是的话我怎样才能实现这一目标？
我尝试创建这样的类别文件：
@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：
由于未捕获的异常而终止应用程序UIApplicationInvalidInterfaceOrientation， 原因：Supported orientations has no common orientation with the application, and shouldAutorotate is returning YES
我已经尝试过这个并且它有效：http://www.sebastianborggrewe.de/only-make-one-single-view-controller-rotate/
首先，将代码添加到您的 AppDelegate 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，在您的横向视图控制器中添加此方法
- (void)canRotate { }
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