How to make the ViewController visible on top of the previous one? Like UIAlertController?

Question

Objective-C

I agree. The wording is terrible, noted t. I will show an example

Or something like UIAlertController

Answer 1

everything is simple:

topViewController.view.backgroundColor = UIColor.clear
topViewController.modalPresentationStyle = .overFullScreen
bottomViewController.present(topViewController, animated: true, completion: nil)

Answer 2

Perhaps you need a Pop Up View Controller. Those. displaying the new VC on top of ours. Here is a link to a video I watched on this topic:
https://www.youtube.com/watch?v=FgCIRMz_3dE
It's like your example.
If you want the new VC to completely overlap the previous one, I would use Present Modally.
I could be wrong, I've been doing programming for a month now.
Himself still youngling