How I can instantly replace presented UIViewController?

Question

I have implemented two different UIViewControllers , that should replace each other based on server respond and user actions. For simplicity let's think that we have two UIViewControllers with button replace with another , that should trigger this replacement.

Now I need to do that replace part, but the problem is there is some delay between dismissing one screen and showing the other. I want to somehow get rid of it. I show UIViewController modally with present method .

I thought about making these two screen as views in xib -files, and one UIViewController that will be loading these xibs , adding them as subViews and replacing one subView with another when it needs it, but maybe there is a way to do that with two UIViewControllers ?

Code that I use to present controller:

let vc = UIViewController1()
vc.modalPresentationStyle = .overFullScreen
self.present(vc, animated: false, completion: nil)

And to dismiss:

self.dismiss(animated: false, completion: nil)

Answer 1

you can add a container view and in that view you can simply add your desired controller as the child view controller official doc reference.

another reference

Answer 2

将当前方法的“动画”参数设置为false

Answer 3

• To Present

let vc = UIStoryboard.init(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "YourViewController") as! YourViewController
self.present(vc, animated: false, completion: nil)

• To Dismiss

self.dismiss(animated: false, completion: nil)

First you send notification to parent class for present another 'viewController' and then dismiss current class

• Note: Both present class method set animation false