shouldAllowRotateToInterfaceOrientation

gistfile1.m

+ (BOOL) shouldAllowRotateToInterfaceOrientation:(UIInterfaceOrientation) interfaceOrientation
{
	NSString* currentOrientation = @"";
	switch (interfaceOrientation)
	{
		case UIInterfaceOrientationLandscapeLeft:
			currentOrientation = @"UIInterfaceOrientationLandscapeLeft";
			break;
		case UIInterfaceOrientationLandscapeRight:
			currentOrientation = @"UIInterfaceOrientationLandscapeRight";
			break;
		case UIInterfaceOrientationPortrait:
			currentOrientation = @"UIInterfaceOrientationPortrait";
			break;
		case UIInterfaceOrientationPortraitUpsideDown:
			currentOrientation = @"UIInterfaceOrientationPortraitUpsideDown";
			break;
	}

	NSString* supportedOrientationsKey = @"UISupportedInterfaceOrientations";
	if([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad)
		supportedOrientationsKey = @"UISupportedInterfaceOrientations~ipad";

	NSArray* allowedOrientations = [[[NSBundle mainBundle] infoDictionary] objectForKey:supportedOrientationsKey];
	for (NSString* allowedOrientation in allowedOrientations)
	{
		if ([allowedOrientation isEqualToString:currentOrientation])
			return YES;
	}

	return NO;
}