To enable the interface orientation in UIView just add the given code into your interface orientation method..

UIInterfaceOrientation interfaceOrientation = self.interfaceOrientation;



typedef enum {
  UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait,
  UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,
  UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeLeft,
  UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeRight
} UIInterfa

iPhone Interface Orientation code

 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return YES; // Return YES is the same as entering all interfaces.
}


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

if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {


    [self presentModalViewController:landscapeChartViewController animated:NO];
}

if (UIInterfaceOrientationIsPortrait(toInterfaceOrientation)) {

    [self.parentViewController dismissModalViewControllerAnimated:NO];
    // self.parentViewController seems like a call FROM the modalViewController. 
    // This should be moved to the modalViewControllers implementation
}
}