Having a scrolling problem with MessageKit on SwiftUI

[crspybits]

Thanks so much for your library! I've got it in a production app (Neebla on the app store) and am updating that app with SwiftUI and running into an issue.

Describe the bug
When I tap in the input field, I am finding it necessary to tap a second time in the input field to get proper scrolling. Without the second tap, I can scroll the content out of view. See:
https://www.dropbox.com/s/b599saahswohiqh/Problem%20with%20scrolling.mov?dl=0

To Reproduce
My code is based on the SwiftUI example posted here.
It's all online. This is the code based on MessageKit:
https://github.com/SyncServerII/Neebla/tree/main/Neebla/UI/Screens/Comments

Expected behavior
I expect to not be able to scroll the messages completely off the screen.

Screenshots
See video.

Environment

• What version of MessageKit are you using?
  3.4.2

• What version of iOS are you running on?
  14.2

• What version of Swift are you running on?
  5.3

• What device(s) are you testing on? Are these simulators?
  Simulators and physical iPhone.

• Is the issue you're experiencing reproducible in the example app?
  I've not provided one yet. Sorry. I can do that if needed.

What I'd appreciate is some insight into which code gets triggered on this second tap into the input field. I've looked into it and can't yet find it.

Additional context
I'm using SPM. My UI is mostly SwiftUI.

[Kaspik]

Might be related: #1481

[martinpucik]

@crspybits could you try again with the latest master? #1506 may have fixed this

[crspybits]

I just tried master. Unfortunately, there's no change in the behavior that I'm seeing.

[crspybits]

It definitely looks related to #1481.

[crspybits]

I assume the scroll view contentSize should change when the keyboard appears. I put this into the MessageSwiftUIVC:

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillDisappear), name: UIResponder.keyboardWillHideNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardDidAppear), name: UIResponder.keyboardDidShowNotification, object: nil)
    }

    @objc func keyboardDidAppear() {
        // messagesCollectionView.scrollToLastItem(at: .top, animated: true)
        print("view.frame.size: \(view.frame.size)")
        print("messagesCollectionView.frame.size: \(messagesCollectionView.frame.size)")
        print("messagesCollectionView.contentSize: \(messagesCollectionView.contentSize)")
    }

    @objc func keyboardWillDisappear() {
    }

and when the keyboard appears, I get (in the Xcode console output):

view.frame.size: (414.0, 389.5396482530875)
messagesCollectionView.frame.size: (414.0, 389.5)
messagesCollectionView.contentSize: (414.0, 615.0)

[crspybits]

Playing with this some more and changing away from deprecations (in MessageKit), it looks like my problem is resolved. Going to test a little more.

[crspybits]

Hmmm. Not seeing that improved result again. Still getting content scrolling out of view.

[jminutaglio]

Also having the same scrolling out of view... :(

[crspybits]

I see that this has a question mark, i.e., bug?. Anything more I can provide? I am still seeing this issue with MessageKit in my app. Thanks!

[Kaspik]

SwiftUI is still experimental for MessageKit, we should mention that anywhere... I haven't even took a look on the current implementation / support for SwiftUI honestly.