强制横向ios 7

Question

我尝试了以下方法来强迫我的观点中的一个景观：

- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskLandscape;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
    return UIInterfaceOrientationLandscapeLeft;
}

- (BOOL)shouldAutorotate{
    return YES;
}

两种方法都不起作用。请注意，我是在模拟器和iPad上测试的。

谢谢

Answer 1

以下是我是如何使用NavigationViewController强制我的一个视图成为景观的：

视图控制器中的https://stackoverflow.com/a/12662433/2394787

• Imported消息:在viewDidLoad方法中objc/message.h

• Added这行代码：

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

希望这能帮助到别人。

Answer 2

公认的答案似乎在iOS 7.1.2上不起作用。(它在模拟器上工作，但在设备上运行时不工作。)

不过，这似乎是可行的：

[[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];

}

//来自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notificationCenter