Handle Orientation in iPhone/iPad

By default iOS5 and earlier supports only portrait mode orientation, if we want to enable all orientation we have to implement shouldAutorotateToInterfaceOrientation method in UIViewController.

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES; //YES for supporting all orientation. NO- disable orientation
}

iOS have four orientations are 

   UIInterfaceOrientationPortrait
   UIInterfaceOrientationPortraitUpsideDown
   UIInterfaceOrientationLandscapeLeft    
   UIInterfaceOrientationLandscapeRight

if dont want any one orientation, then check the orientation and return NO

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if(UIInterfaceOrientation == UIInterfaceOrientationLandscapeLeft)
    return NO; //disable UIInterfaceOrientationLandscapeLeft orientation
else
   return YES;
}

Find device orientation changes :-
//implement this method to find the device orientation changes

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
  
}

If your application doesn't call didRotateFromInterfaceOrientation method then you have to add your controller as child view controller in then rootview controller.

- (void)viewDidLoad
{
   [super viewDidLoad];    
   [self addChildViewController:(UIViewController*) self.yourChildController];
}  



Changing UIView when Orientation change :-

    Here i created two UIView and assigned when orientation changed. I created two dashboard UIView for portrait and landscape , get the IBOutlet from XIB 

 Views.

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

{
  if(interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight )
    {
        self.view = self.LandscapeView;
    }
    else {
        self.view = self.portraitView;
    }
    return YES;
}





Download the source code for better understanding : https://github.com/karthikprabhuA/iPhoneOrientationHandling