Set All Orientation for only one UIViewController in your whole application.

In AppDelegate class just use this bellow method which is available in iOS 6 and later....

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {

    // Get topmost/visible view controller

    UIViewController *currentViewController = [self topViewController];// this topViewController is my custom method which i post bellow...

    if ([currentViewController isKindOfClass:[YourClassName class]]) {

            // Unlock landscape view orientations for this view controller

            return UIInterfaceOrientationMaskAllButUpsideDown;

    }

    

    // Only allow portrait (standard behaviour)

    return UIInterfaceOrientationMaskPortrait;

}

This is custom methods which is used to find out top viewController

- (UIViewController*)topViewController {

    return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController];

}

- (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController {

    if ([rootViewController isKindOfClass:[UITabBarController class]]) {

        UITabBarController* tabBarController = (UITabBarController*)rootViewController;

        return [self topViewControllerWithRootViewController:tabBarController.selectedViewController];

    } else if ([rootViewController isKindOfClass:[UINavigationController class]]) {

        UINavigationController* navigationController = (UINavigationController*)rootViewController;

        return [self topViewControllerWithRootViewController:navigationController.visibleViewController];

    } else if (rootViewController.presentedViewController) {

        UIViewController* presentedViewController = rootViewController.presentedViewController;

        return [self topViewControllerWithRootViewController:presentedViewController];

    } else {

        return rootViewController;

    }

}

Also For do some changes in your that class in which you want to available different orientation then in that class's use bellow method...

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

    if (toInterfaceOrientation == UIInterfaceOrientationLandscapeLeft || toInterfaceOrientation == UIInterfaceOrientationLandscapeRight) {

        NSLog(@"Landscape Orientation Called");

    }

    else{

        NSLog(@"Potrait Orientation Called");

    }

}  

If Any suggestion then please post comment...