ios - 强制景观ios 7

Question

我尝试了以下方法来强制我的观点中的一个景观：

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscape;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationLandscapeLeft;
}

- (BOOL)shouldAutorotate{
    return YES;
}

也没有工作。请注意，我正在模拟器和 iPad 上进行测试。

谢谢

Answer 1

以下是我如何使用 NavigationViewController 强制我的视图之一为横向：

1. 实现了这个答案：https ://stackoverflow.com/a/12662433/2394787

2. 视图控制器中导入的消息：objc/message.h

3. 在 viewDidLoad 方法中添加了这行代码：

objc_msgSend([UIDevice currentDevice], @selector(setOrientation:), UIInterfaceOrientationLandscapeLeft);

希望它可以帮助某人。

Answer 2

接受的答案似乎不适用于 iOS 7.1.2。（它适用于模拟器，但在设备上运行时不起作用。）

这似乎有效：

[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIInterfaceOrientationPortrait] forKey:@"orientation"];

[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIInterfaceOrientationLandscapeLeft] forKey:@"orientation"];

Answer 3

int shouldShowInLandscape = 0;

-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {


    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(forceToLandscape:)
                                                 name:@"yourNameNotification"
                                               object:nil];

}

-(NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
    {
              return UIInterfaceOrientationMaskLandscapeLeft;
    } else {
            if(shouldShowInLandscape)
            {
                return UIInterfaceOrientationMaskLandscape;
            }
            return UIInterfaceOrientationMaskPortrait;
    }
}

-(void) forceToLandscape:(NSNotification*) theNot
{
    shouldShowInLandscape = [[theNot object] intValue];

}

// 从 UIViewController

- (void)viewDidLoad
{
    [super viewDidLoad];

    [[NSNotificationCenter defaultCenter]
     postNotificationName:@"yourNameNotification"
     object:[NSString stringWithFormat:@"1"]];
}

-(void) viewDidDisappear:(BOOL)animated
{

        [[NSNotificationCenter defaultCenter]
     postNotificationName:@"yourNameNotification"
     object:[NSString stringWithFormat:@"0"]]; 

}

// 移除你的通知中心