How to only allow landscape orientation on an iPad?

Question

So I've already tried setting the Supported Interface Orientations key in my iPad app's Info.plist to support both landscape modes. However when I put my iPad in a portrait orientation, my screen rotates. Because of the way my app is designed I only want my app to display itself in either landscape modes, how can I do that?

Answer 1

Setting the Info.plist key is mainly used for determining the orientation of your app at startup. If your view controllers return YES for a given orientation from shouldAutorotateToInterfaceOrientation:, the interface will be allowed to orient itself that way, regardless of what the Info.plist says. The solution is to only allow landscape orientations in that method:

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)orientation
{
    return UIInterfaceOrientationIsLandscape(orientation);
}

Answer 2

return (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight);