Question

My iphone application supports both portrait and landscape orientation. To do this in new iphone 5 iOS 6 introduces a new property called auto layout constraint. But I need to support my application both iOS 5 and iOS 6. So I cannot use this constraints. Is there any way to do this portrait and landscape orientation without using auto layout ?

Answer 1

YES you can do this very easily.

For iOS6

UIViewControllers, in which you need only PORTRAIT mode, write these functions

- (BOOL)shouldAutorotate
{
     return YES;
}

- (NSUInteger)supportedInterfaceOrientations
{
     return (UIInterfaceOrientationMaskPortrait);
}

For UIViewControllers, which require LANDSCAPE too, change masking to All.

- (NSUInteger)supportedInterfaceOrientations
{
    return (UIInterfaceOrientationMaskAllButUpsideDown);
    //OR return (UIInterfaceOrientationMaskAll);
}

Now, if you want to do some changes when Orientation changes, then use this function.

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

}

For iOS5

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

    if (interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) {
        return YES;
    }

    return NO;
}