Change RootViewcontroller with the Push Transition effect

Question

in my iOS App i need to change the rootviewController of the window in between of app .so when i change my rootviewcontroller dyncamically its flicking the view before its chang

Answer 1

Based on this Apple's documentation

UIViewController *viewControllerToBeShown=[[UIViewController alloc]init];

//viewControllerToBeShown.view.frame = self.view.frame;

viewControllerToBeShown.view.backgroundColor = [UIColor orangeColor];



AppDelegateClass *yourAppDelegate  =(AppDelegateClass*)[UIApplication sharedApplication].delegate;


UIView *myView1 = yourAppDelegate.window.rootViewController.view;

UIView *myView2 = viewControllerToBeShown.view;

myView2.frame = yourAppDelegate.window.bounds;


[yourAppDelegate.window addSubview:myView2];


CATransition* transition = [CATransition animation];
transition.startProgress = 0;
transition.endProgress = 1.0;
transition.type = kCATransitionPush;
transition.subtype = kCATransitionFromRight;
transition.duration = 5.0;

// Add the transition animation to both layers
[myView1.layer addAnimation:transition forKey:@"transition"];
[myView2.layer addAnimation:transition forKey:@"transition"];

myView1.hidden = YES;
myView2.hidden = NO;


yourAppDelegate.window.rootViewController = viewControllerToBeShown;

Swift

        guard let appDelegate = UIApplication.shared.delegate,
            let appDelegateWindow = appDelegate.window,
            let appDelegateView = window.rootViewController?.view,
            let viewContollersView = viewController.view else {
            return
        }
        viewContollersView.frame = (appDelegateWindow?.bounds)!
        appDelegate.window??.addSubview(viewContollersView)
        let transition = CATransition()
        transition.startProgress = 0
        transition.endProgress = 1.0
        transition.type = kCATransitionPush
        transition.subtype = kCATransitionFromRight
        transition.duration = 0.35
        appDelegateView.layer.add(transition, forKey: "transition")
        viewContollersView.layer.add(transition, forKey: "transition")
        appDelegateView.isHidden = true
        viewContollersView.isHidden = false
        appDelegateWindow?.rootViewController = viewController