Check Device Orientation in Various State of the Application

Question

How to find the Device Orientation in the following application states:

1. First time launching application
2. Application entering in to foreground

Answer 1

You Can detect orientation at first time launching application like this :

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

 [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
 [[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(deviceOrientationDidChange:) name: UIDeviceOrientationDidChangeNotification object: nil];
 }

To detect the Orientations :

-(void)deviceOrientationDidChange:(NSNotification *)notification
{
         UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];

         //Ignoring specific orientations
         if (orientation == UIDeviceOrientationFaceUp || orientation == UIDeviceOrientationFaceDown || orientation == UIDeviceOrientationUnknown || currentOrientation == orientation)
         {
         //To check orientation ;
         }

         if ([[NSUserDefaults standardUserDefaults] boolForKey:@"deveiceorientation"])
         {
           // your orientation
         }
         else
        {
           [[NSUserDefaults standardUserDefaults] setObject:deviceOrientaion forKey:@"deveiceorientation"];
           [[NSUserDefaults standardUserDefaults] synchronize];
           // save your orientation
          }

}

On application enter foreground you can check the same using

-(void)viewDidAppear:(BOOL)animated{

}