AppDelegate *appDelegate = (AppDelegate *) [UIApplication sharedApplication].delegate;
        appDelegate.restrictRotation = TRUE;


        MapViewController * sliderVC =      [[MapViewController alloc] init ];

        sliderVC.modalPresentationStyle = UIModalPresentationCurrentContext;
        [self presentViewController:sliderVC animated:NO completion:nil];
        sliderVC.view.backgroundColor =  [UIColor clearColor];

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    if(self.restrictRotation)//set the bool value to view controller which you want to load in landscape
        return UIInterfaceOrientationMaskLandscapeRight;
    else
        return UIInterfaceOrientationMaskPortrait;
}