gistfile1.m

    double delayInSeconds = 0.3;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        
        NSLog(@"!!!!!!!    Go time     !!!!!!");
        EAForcedUpdateViewController *f = [[EAForcedUpdateViewController alloc] initWithNibName:nil bundle:nil];
        UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
        window.rootViewController = f;
//        [self.window resignKeyWindow];
//        [self.window setHidden:YES];
//        self.window.rootViewController = f;
        [window makeKeyWindow];
        [window makeKeyAndVisible];
        [window becomeKeyWindow];
//        [self.window addSubview:f.view];
        double delayInSeconds = 200.0;
        dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
        dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
            [f description];
        });
    });