blocks|key|726194|text|非常老的线程，但没有真正的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|726195|我也遇到过同样的问题，但我发现获取UIDeviceOrientation并不总是一致的，所以改用下面的代码：|726196|UIInterfaceOrientation+orientation+=+[UIApplication+sharedApplication].statusBarOrientation;

if(orientation+==+0)+//Default+orientation+
++++//UI+is+in+Default+(Portrait)+--+this+is+really+a+just+a+failsafe.+
else+if(orientation+==+UIInterfaceOrientationPortrait)
++++//Do+something+if+the+orientation+is+in+Portrait
else+if(orientation+==+UIInterfaceOrientationLandscapeLeft)
++++//+Do+something+if+Left
else+if(orientation+==+UIInterfaceOrientationLandscapeRight)
++++//Do+something+if+right|code-block|syntax|javascript|726197|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Really old thread, but no real solution. 

I Had the same problem, but found out that getting The UIDeviceOrientation isn't always consistent, so instead use this:

<pre><code>UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;

if(orientation == 0) //Default orientation 
 //UI is in Default (Portrait) -- this is really a just a failsafe. 
else if(orientation == UIInterfaceOrientationPortrait)
 //Do something if the orientation is in Portrait
else if(orientation == UIInterfaceOrientationLandscapeLeft)
 // Do something if Left
else if(orientation == UIInterfaceOrientationLandscapeRight)
 //Do something if right
</code></pre>

blocks|key|726115|text|UIViewController有一个interfaceOrientation属性，您可以访问该属性来查找视图控制器的当前方向。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|726116|至于你的例子，这应该是可行的。当你说它不工作时，你是什么意思？与您预期的结果相比，它给您带来了什么结果？|726117|entityMap^0|0|G|J|K|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

<code>UIViewController</code> has an <code>interfaceOrientation</code> property that you can access to find out the current orientation of a view controller.

As for your example, that should work. When you say it isn't working, what do you mean? What results does it give you versus what you expected?

blocks|key|726146|text|您是否解锁了设备方向的硬件锁？在我的iPad+1的边缘有一个。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|726147|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Have you unlocked the hardware lock for device orientation? There is one at the edge of my iPad 1.

blocks|key|726238|text|以下是一些Swift变量，可以让检测变得更容易：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|726239|let+LANDSCAPE_RIGHT:+Bool+=+UIDevice.currentDevice().orientation+==+UIDeviceOrientation.LandscapeRight
let+LANDSCAPE_LEFT:+Bool+=+UIDevice.currentDevice().orientation+==+UIDeviceOrientation.LandscapeLeft
let+LANDSCAPE:+Bool+=+LANDSCAPE_LEFT+%7C%7C+LANDSCAPE_RIGHT
let+PORTRAIT_NORMAL:+Bool+=+UIDevice.currentDevice().orientation+==+UIDeviceOrientation.Portrait
let+PORTRAIT_REVERSE:+Bool+=+UIDevice.currentDevice().orientation+==+UIDeviceOrientation.PortraitUpsideDown
let+PORTRAIT:+Bool+=+PORTRAIT_REVERSE+%7C%7C+PORTRAIT_NORMAL|code-block|syntax|javascript|726240|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is some Swift variables to make detection easier:

<pre><code>let LANDSCAPE_RIGHT: Bool = UIDevice.currentDevice().orientation == UIDeviceOrientation.LandscapeRight
let LANDSCAPE_LEFT: Bool = UIDevice.currentDevice().orientation == UIDeviceOrientation.LandscapeLeft
let LANDSCAPE: Bool = LANDSCAPE_LEFT || LANDSCAPE_RIGHT
let PORTRAIT_NORMAL: Bool = UIDevice.currentDevice().orientation == UIDeviceOrientation.Portrait
let PORTRAIT_REVERSE: Bool = UIDevice.currentDevice().orientation == UIDeviceOrientation.PortraitUpsideDown
let PORTRAIT: Bool = PORTRAIT_REVERSE || PORTRAIT_NORMAL
</code></pre>

blocks|key|726273|text|我目前的做法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|726274|%2B+(BOOL)isPortrait+{
++++let+window+=+UIApplication.sharedApplication.delegate.window;
++++if(window.rootViewController)+{
++++++++let+orientation+=
++++++++window.rootViewController.interfaceOrientation;
++++++++return+UIInterfaceOrientationIsPortrait(orientation);
++++}+else+{
++++++++let+orientation+=
++++++++UIApplication.sharedApplication.statusBarOrientation;
++++++++return+UIInterfaceOrientationIsPortrait(orientation);
++++}
}|code-block|syntax|javascript|726275|如果由于某种原因没有对statusBarOrientation进行故障保护的rootViewController+...|726276|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

My current way of doing this:

<pre><code>+ (BOOL)isPortrait {
 let window = UIApplication.sharedApplication.delegate.window;
 if(window.rootViewController) {
 let orientation =
 window.rootViewController.interfaceOrientation;
 return UIInterfaceOrientationIsPortrait(orientation);
 } else {
 let orientation =
 UIApplication.sharedApplication.statusBarOrientation;
 return UIInterfaceOrientationIsPortrait(orientation);
 }
}
</code></pre>

If there is for some reason no rootViewController yet fail safe to statusBarOrientation...

blocks|key|726305|text|swift中最可靠的方式是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|726306|public+extension+UIScreen+{

++++public+class+var+isPortrait:+Bool+{
++++++++UIApplication.shared.delegate?.window??.rootViewController?.interfaceOrientation.isPortrait+??
++++++++++++++++UIApplication.shared.statusBarOrientation.isPortrait
++++}

++++public+class+var+isLandscape:+Bool+{+!isPortrait+}
}|code-block|syntax|javascript|726307|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

And the best reliable way in swift :

<pre><code>public extension UIScreen {

 public class var isPortrait: Bool {
 UIApplication.shared.delegate?.window??.rootViewController?.interfaceOrientation.isPortrait ??
 UIApplication.shared.statusBarOrientation.isPortrait
 }

 public class var isLandscape: Bool { !isPortrait }
}
</code></pre>

blocks|key|942494|text|这是我使用Combine的解决方案，它很容易与SwiftUI或常规的Swift对象一起使用。对于这种真正的全局对象，单例对象(静态实例)比“环境”更好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|942495|//+Singleton+object+to+keep+the+interface+orientation+(and+any+other+global+state)
class+SceneContext:+ObservableObject+{
++++@Published+var+interfaceOrientation+=+UIInterfaceOrientation.portrait
++++static+let+shared+=+SceneContext()
}

class+SceneDelegate:+UIResponder,+UIWindowSceneDelegate+{
++++...
++++func+windowScene(_+windowScene:+UIWindowScene,+didUpdate+previousCoordinateSpace:+UICoordinateSpace,+interfaceOrientation+previousInterfaceOrientation:+UIInterfaceOrientation,+traitCollection+previousTraitCollection:+UITraitCollection)+{
++++++++SceneContext.shared.interfaceOrientation+=+windowScene.interfaceOrientation
++++}
}

++++//+if+you+want+to+execute+some+code+whenever+the+orientation+changes+in+SwiftUI
++++someView+{
++++++++....
++++}
++++.onReceive(SceneContext.shared.$interfaceOrientation)+{+(orientation)+in
++++++++//+do+something+with+the+new+orientation
++++}

++++//+if+you+want+to+execute+some+code+whenever+the+orientation+changes+in+a+regular+Swift+object
++++let+pub+=+SceneContext.shared.$interfaceOrientation.sink(receiveValue:+{+(orientation)+in
++++++++++++//+do+something+with+the+new+orientation
++++++++++++...
++++++++})+|code-block|syntax|javascript|942496|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is my solution with Combine, which is quite easy to use with SwiftUI or regular Swift Object. A singleton object (static instance) is better than the &quot;environment&quot; for this kind of truly global object.
<pre><code>// Singleton object to keep the interface orientation (and any other global state)
class SceneContext: ObservableObject {
 @Published var interfaceOrientation = UIInterfaceOrientation.portrait
 static let shared = SceneContext()
}

class SceneDelegate: UIResponder, UIWindowSceneDelegate {
 ...
 func windowScene(_ windowScene: UIWindowScene, didUpdate previousCoordinateSpace: UICoordinateSpace, interfaceOrientation previousInterfaceOrientation: UIInterfaceOrientation, traitCollection previousTraitCollection: UITraitCollection) {
 SceneContext.shared.interfaceOrientation = windowScene.interfaceOrientation
 }
}

 // if you want to execute some code whenever the orientation changes in SwiftUI
 someView {
 ....
 }
 .onReceive(SceneContext.shared.$interfaceOrientation) { (orientation) in
 // do something with the new orientation
 }

 // if you want to execute some code whenever the orientation changes in a regular Swift object
 let pub = SceneContext.shared.$interfaceOrientation.sink(receiveValue: { (orientation) in
 // do something with the new orientation
 ...
 }) 

</code></pre>

blocks|key|942526|text|使用此函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|942527|++++func+deviceOrientation()+->+String!+{
++++let+device+=+UIDevice.current
++++if+device.isGeneratingDeviceOrientationNotifications+{
++++++++++++device.beginGeneratingDeviceOrientationNotifications()
++++++++++++var+deviceOrientation:+String
++++++++++++let+deviceOrientationRaw+=+device.orientation.rawValue
++++++++++++switch+deviceOrientationRaw+{
++++++++++++case+1:
++++++++++++++++deviceOrientation+=+"Portrait"
++++++++++++case+2:
++++++++++++++++deviceOrientation+=+"Upside+Down"
++++++++++++case+3:
++++++++++++++++deviceOrientation+=+"Landscape+Right"
++++++++++++case+4:
++++++++++++++++deviceOrientation+=+"Landscape+Left"
++++++++++++case+5:
++++++++++++++++deviceOrientation+=+"Camera+Facing+Down"
++++++++++++case+6:
++++++++++++++++deviceOrientation+=+"Camera+Facing+Up"
++++++++++++default:
++++++++++++++++deviceOrientation+=+"Unknown"
++++++++++++}
++++++++++++return+deviceOrientation
++++++++}+else+{
++++++++++++return+nil
++++++++}
++++}|code-block|syntax|javascript|942528|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use This Function.
<pre><code> func deviceOrientation() -&gt; String! {
 let device = UIDevice.current
 if device.isGeneratingDeviceOrientationNotifications {
 device.beginGeneratingDeviceOrientationNotifications()
 var deviceOrientation: String
 let deviceOrientationRaw = device.orientation.rawValue
 switch deviceOrientationRaw {
 case 1:
 deviceOrientation = &quot;Portrait&quot;
 case 2:
 deviceOrientation = &quot;Upside Down&quot;
 case 3:
 deviceOrientation = &quot;Landscape Right&quot;
 case 4:
 deviceOrientation = &quot;Landscape Left&quot;
 case 5:
 deviceOrientation = &quot;Camera Facing Down&quot;
 case 6:
 deviceOrientation = &quot;Camera Facing Up&quot;
 default:
 deviceOrientation = &quot;Unknown&quot;
 }
 return deviceOrientation
 } else {
 return nil
 }
 }
</code></pre>

I have a question on how to detect the device orientation on iOS. I don't need to receive change notifications, just the current orientation itself. This seems to be a rather simple question, but I haven't been able to wrap my head around it. Below is what I have done so far:

<pre><code>UIDevice *myDevice = [UIDevice currentDevice] ;
[myDevice beginGeneratingDeviceOrientationNotifications];
UIDeviceOrientation deviceOrientation = myDevice.orientation;
BOOL isCurrentlyLandscapeView = UIDeviceOrientationIsLandscape(deviceOrientation);
[myDevice endGeneratingDeviceOrientationNotifications];
</code></pre>

In my mind this should work. I enable the device to receive device orientation notices, then ask for what orientation it is in, but then it is not working and I don't know why.

How Do I detect the orientation of the device on iOS?

我有一个关于如何在iOS上检测设备方向的问题。我不需要接收更改通知，只需要接收当前方向本身。这似乎是一个相当简单的问题，但我还不能理解它。以下是我到目前为止所做的工作：UIDevice *myDevice = [UIDevice currentDevice] ;[myDevice beginGeneratingDeviceOrientationNotifications];UIDeviceOrie

问如何在iOS上检测设备的方向？
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