ios - Get device current orientation (App Extension)

Question

How to get device current orientation in an App Extension, I have tried below two methods but no success.

It always return UIDeviceOrientationUnknown
```
[[UIDevice currentDevice] orientation]
```
It shows red message that ‘sharedApplication’ is not available on iOS (App Extension)
```
[[UIApplication sharedApplication] statusBarOrientation];
```

I also add an observer but it not getting called.

[[NSNotificationCenter defaultCenter] addObserver:self.view selector:@selector(notification_OrientationWillChange:) name:UIApplicationWillChangeStatusBarOrientationNotification object:nil];



- (void)notification_OrientationWillChange:(NSNotification*)n
{
   UIInterfaceOrientation orientation = (UIInterfaceOrientation)[[n.userInfo objectForKey:UIApplicationStatusBarOrientationUserInfoKey] intValue];

    if (orientation == UIInterfaceOrientationLandscapeLeft)
       [self.textDocumentProxy insertText:@"Left"];
    if (orientation == UIInterfaceOrientationLandscapeRight)
       [self.textDocumentProxy insertText:@"Right"];
}

So now how can anyone get current device orientation.

score 19 · Accepted Answer

我有个主意！

extension UIScreen {

    var orientation: UIInterfaceOrientation {
        let point = coordinateSpace.convertPoint(CGPointZero, toCoordinateSpace: fixedCoordinateSpace)
        if point == CGPointZero {
            return .Portrait
        } else if point.x != 0 && point.y != 0 {
            return .PortraitUpsideDown
        } else if point.x == 0 && point.y != 0 {
            return .LandscapeLeft
        } else if point.x != 0 && point.y == 0 {
            return .LandscapeRight
        } else {
            return .Unknown
        }
    }

}

编辑：在 Swift 4 上，您可以执行以下操作：

extension UIScreen {
    var orientation: UIInterfaceOrientation {
        let point = coordinateSpace.convert(CGPoint.zero, to: fixedCoordinateSpace)
        switch (point.x, point.y) {
        case (0, 0):
            return .portrait
        case let (x, y) where x != 0 && y != 0:
            return .portraitUpsideDown
        case let (0, y) where y != 0:
            return .landscapeLeft
        case let (x, 0) where x != 0:
            return .landscapeRight
        default:
            return .unknown
        }
    }
}

score 9 · Accepted Answer

我在（App Extension）中找到了一种可以像这样计算设备方向的方法

- (void)viewDidLayoutSubviews
{
   if(self.view.frame.size.width > self.view.frame.size.height)
      NSLog(@"Landscape");
   else
      NSLog(@"Portrait");
}

它给了我正确的方向，但仍然没有得到，因为设备是LandscapeLeft或LandscapeRight以及Portrait或PortraitUpsideDown。

仍然需要帮助。

score 6 · Accepted Answer

如果你之前添加这个，观察者方法将被调用： [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

编辑：我UIApplicationDidChangeStatusBarOrientationNotification用于观察者

在我的方法中，我检查：

UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation]; BOOL isPortrait = UIDeviceOrientationIsPortrait(orientation);

编辑 2- Xcode 6.2 - iOS 7 & 8

似乎如果你想在 iOS 7 和 8 上都使用它，上面的代码会在 iOS 7 上给你错误的结果。

所以我使用了其他东西，因为在 iOS 7 上 mainScreen 的边界永远不会改变，但在 iOS 8 上，如果方向改变，它就会改变。

无论 iOS 版本如何，我都有 3 个宏可以为我提供正确的屏幕宽度和高度：

#define IOS_VERSION_OLDER_THAN_8 ([[[UIDevice currentDevice] systemVersion] floatValue] < 8.0)

#define SCREEN_WIDTH_CALCULATED (IOS_VERSION_OLDER_THAN_8 ? (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation) ? [[UIScreen mainScreen] bounds].size.width : [[UIScreen mainScreen] bounds].size.height) : [[UIScreen mainScreen] bounds].size.width)

#define SCREEN_HEIGHT_CALCULATED (IOS_VERSION_OLDER_THAN_8 ? (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation) ? [[UIScreen mainScreen] bounds].size.height : [[UIScreen mainScreen] bounds].size.width) : [[UIScreen mainScreen] bounds].size.height)

然后，当通知被触发时，我会像这样检查方向：

BOOL isPortrait = SCREEN_WIDTH_CALCULATED < SCREEN_HEIGHT_CALCULATED;

这适用于 iOS 7 和 iOS 8，但我没有检查旧版本的 Xcode，只有 6.2

仅当设备处于纵向或横向时才会返回，而不是所有 4 种方向类型

score 6 · Accepted Answer

在 BroadcastExtension 中，您可以使用 sampleBuffer 来了解方向：

if let orientationAttachment =  CMGetAttachment(sampleBuffer, RPVideoSampleOrientationKey as CFString, nil) as? NSNumber 
{  
          let orientation = CGImagePropertyOrientation(rawValue: orientationAttachment.uint32Value)   
}

score 0 · Accepted Answer

你可以看看这个库和它的分支。它使用 CoreMotion 来检测设备方向，因此它可以在 App Extension 的受限环境中工作。

score 0 · Accepted Answer

我知道已经晚了，但这个问题的错误在于这一行：

[[NSNotificationCenter defaultCenter] addObserver:self.view selector:@selector(notification_OrientationWillChange:) name:UIApplicationWillChangeStatusBarOrientationNotification object:nil];

addObserver:self.view是错误的，应该附加通知self以便被调用。也适用于 iOS8。

score 0 · Accepted Answer

我无法让它在 iMessage 应用程序扩展中工作。据我所知，Apple 似乎已经默默地禁用了它。https://forums.developer.apple.com/thread/53981

score 0 · Accepted Answer

方便的扩展方法，只需调用UIInterfaceOrientation.current

extension UIInterfaceOrientation {
    static var current: UIInterfaceOrientation {
        return UIApplication.shared.windows.first?.windowScene?.interfaceOrientation ?? UIInterfaceOrientation.portrait
    }
}

score 0 · Accepted Answer

使用 CoreMotion 框架可以获取设备方向。

func startMonitorDeviceOrientation() {
    if motionManager.isDeviceMotionAvailable {
        motionManager.deviceMotionUpdateInterval = 1.0
        let queue = OperationQueue()

        motionManager.startDeviceMotionUpdates(to: queue) { (deviceMotion, error) in
            guard let x = deviceMotion?.gravity.x,
            let y = deviceMotion?.gravity.y
            else {
                return
            }

            if fabs(y) >= fabs(x) {
                if y >= 0 {
                    // UIDeviceOrientationPortraitUpsideDown;
                    print("device orientation UIDeviceOrientationPortraitUpsideDown")
                } else {
                    // UIDeviceOrientationPortrait;
                    print("device orientation UIDeviceOrientationPortrait")
                }
            } else {
                if x >= 0 {
                    // UIDeviceOrientationLandscapeRight;
                    print("device orientation UIDeviceOrientationLandscapeRight")
                } else {
                    // UIDeviceOrientationLandscapeLeft;
                    print("device orientation UIDeviceOrientationLandscapeLeft")
                }
            }
        }
    } else {
        print("Device motion is not avaliable")
    }
}

score -2 · Accepted Answer

此代码不会为您提供确切的 UIDeviceOrientation，但您将能够知道它是处于纵向还是横向模式

BOOL isLandScape = !(self.view.frame.size.width == ([[UIScreen mainScreen] bounds].size.width*([[UIScreen mainScreen] bounds].size.width<[[UIScreen mainScreen] bounds].size.height))+([[UIScreen mainScreen] bounds].size.height*([[UIScreen mainScreen] bounds].size.width>[[UIScreen mainScreen] bounds].size.height)));

score -2 · Accepted Answer

我已经完成了我的自定义键盘扩展，希望它会对你有所帮助..

为了在方向更改时更新您的自定义键盘，请覆盖 UIInputViewController 中的 viewDidLayoutSubviews。换句话说，我们可以说 viewDidLayoutSubviews 总是在旋转完成时调用。

在键盘扩展中，我们无法使用我们通常使用的传统流程：

[UIApplication sharedApplication] statusBarOrientation]

因此，为了检测当前方向，我使用了以下代码：在 Objc 中：

if([UIScreen mainScreen].bounds.size.width < [UIScreen mainScreen].bounds.size.height){
// Portrait Orientation
}
else{
//Landscape Orientation
}

在 swift4 中，你可以使用这个：

if UIScreen.main.bounds.size.width > UIScreen.main.bounds.size.height {
        //portrait Orientation
    }
    else
    {
        //landscape Orientation
    }

ios - Get device current orientation (App Extension)

11 回答 11

Related

Reference