How to check in which position (landscape or portrait) is the iPhone now?

Question

I have an app with a tab bar, and nav controllers in each tab. When user shakes the device, a UIImageView appears as a child view in the nav controller. But the

Answer 1

It helps you...

-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
if ([[UIDevice currentDevice] orientation] == UIDeviceOrientationLandscapeLeft || [[UIDevice currentDevice] orientation ]== UIDeviceOrientationLandscapeRight)
 {
   NSLog(@"Lanscapse");
 }
if([[UIDevice currentDevice] orientation] == UIDeviceOrientationPortrait || [[UIDevice currentDevice] orientation] == UIDeviceOrientationPortraitUpsideDown )
 {
   NSLog(@"UIDeviceOrientationPortrait");
 }
}

Answer 2

You can also define constants to earn time :

#define LANDSCAPE UIInterfaceOrientationIsLandscape(self.interfaceOrientation)
#define LANDSCAPE_RIGHT [UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeLeft
#define LANDSCAPE_LEFT [UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeRight
#define PORTRAIT UIInterfaceOrientationIsPortrait(self.interfaceOrientation)
#define PORTRAIT_REVERSE [UIDevice currentDevice].orientation == UIDeviceOrientationPortraitUpsideDown

Answer 3

Updating this to iOS 8+ where the UIViewController.interfaceOrienation is deprecated, you should use traitCollections. So for example, to check for landscape on iPhone, you'd use:

if self.traitCollection.verticalSizeClass == .compact
{
  your code
}

Notice that this is not the case on iPad, because on iPad in landscape, the size class is not compact. Apple Doc Link

Answer 4

You can also use the interfaceOrientation property of the UIViewController class, if you are stuck and continuously getting UIDeviceOrientationUnknown from UIDevice.

There's a good summary of why [[UIDevice currentdevice] orientation] can sometimes fail here: http://bynomial.com/blog/?p=25, especially if you want to detect the orientation quickly (for example, if you wanted to check right when the app comes out of the background).

Answer 5

Use the [[UIDevice currentDevice] orientation] method, as specified here.

Answer 6

• As Simple Solution of Swift 4.2

  override func didRotate(from fromInterfaceOrientation: UIInterfaceOrientation) {
          switch UIDevice.current.orientation{
          case .portrait:
              print("Portrait")
          case .portraitUpsideDown:
              print("PortraitUpsideDown")
          case .landscapeLeft:
              print("LandscapeLeft")
          case .landscapeRight:
              print("LandscapeRight")
          default:
              print("Another")
          }
      }