Get current orientation of iPad?

Question

In a given event handler (not the \"shouldAutorotateToInterfaceOrientation\" method) how do I detect the current iPad orientation? I have a text field I have to animate up

Answer 1

In your view controller, get the read-only value of self.interfaceOrientation (the current orientation of the interface).

Answer 2

Orientation information isn't very consistent, and there are several approaches. If in a view controller, you can use the interfaceOrientation property. From other places you can call:

[[UIDevice currentDevice] orientation]

Alternatively, you can request to receive orientation change notifications:

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

Some people also like to check the status bar orientation:

[UIApplication sharedApplication].statusBarOrientation

Answer 3

You can achieve this by two ways:

1- By using the following method:

**Put the following line in the -(void)viewDidLoad Method:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(deviceRotated:) name:UIDeviceOrientationDidChangeNotification object:nil];

then put this method inside your class

-(void)deviceRotated:(NSNotification*)notification
{

   UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
    if(orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
    {
        //Do your textField animation here
    }
}

The above method will check the orientation when the device will be rotated

2- The second way is by inserting the following notification inside -(void)viewDidLoad

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkRotation:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];

then put the following method inside your class

-(void)checkRotation:(NSNotification*)notification
{
    UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
    if(orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight)
    {
         //Do your textField animation here
    }
}

The above method will check the orientation of the status bar of the ipad or iPhone and according to it you make do your animation in the required orientation.

Answer 4

I've tried many of the above methods, but nothing seemed to work 100% for me.

My solution was to make an iVar called orientation of type UIInterfaceOrientation in the Root View Controller.

- (void)viewDidLoad {

    [super viewDidLoad];
    orientation = self.interfaceOrientation; // this is accurate in iOS 6 at this point but not iOS 5; iOS 5 always returns portrait on app launch through viewDidLoad and viewWillAppear no matter which technique you use.
}


- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
    return YES;
}

-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration{

    orientation =  toInterfaceOrientation;

}

Then, any place where you need to check the orientation you can do something like this:

 if(UIInterfaceOrientationIsPortrait(orientation)){
    // portrait
  }else{
   // landscape
  }

There may still be a better way, but this seems to work 98% of the time (iOS5 notwithstanding) and isn't too hard. Note that iOS5 always launches iPad in portrait view, then sends a device the willRotateTo- and didRotateFromInterfaceOrientation: messages, so the value will still be inaccurate briefly.

Answer 5

For determining landscape vs portrait, there is a built-in function:

UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
BOOL inLandscape = UIDeviceOrientationIsLandscape(orientation);