I would like to call FrameMarkersAppdelegate from another view base when I push the UIBotton. How can I do?
FrameMarkersAppdelegate.mm
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    CGRect screenBounds = [[UIScreen mainScreen] bounds];
    window = [[UIWindow alloc] initWithFrame: screenBounds];
    [self setupSplashContinuation];
    [QCARutils getInstance].targetType = TYPE_FRAMEMARKERS;
    // Add the EAGLView and the overlay view to the window
    arParentViewController = [[ARParentViewController alloc] init];
    arParentViewController.arViewRect = screenBounds;
    [window insertSubview:arParentViewController.view atIndex:0];
    [window makeKeyAndVisible];
    return YES;
}
ViewController.m
-(IBAction)displaySelection:(id)sender 
{
       // How can I start FrameMarkersAppDelegate here?
}