Is there an equivalent of `UIKitInteropProperties` for `ComposeUIViewController`? The touch handling...

# compose-ios

[Garrison Henkle]

Is there an equivalent of UIKitInteropProperties for ComposeUIViewController? The touch handling changes in 1.7 seem to have broken scrolling of SwiftUI `ScrollView`s that contain `ComposeUIViewController`s, and I don’t see any new properties/functions in ComposeUIViewControllerConfiguration that would allow me to revert the new behavior.

[Garrison Henkle]

An example from my app of code that was working pre-1.7 and stopped working with 1.7:

ScrollView {
    ComposeViewControllerHere().frame(height: height)
}

[Garrison Henkle]

This YouTrack issue seems to be the same issue I’m running into?
https://youtrack.jetbrains.com/issue/CMP-6828/embedded-compose-in-iOS-stops-scrolling

I don’t see anything in the docs pages that describes a way to work around this, unfortunately, e.g.:
• https://www.jetbrains.com/help/kotlin-multiplatform-dev/compose-ios-touch.html
• https://www.jetbrains.com/help/kotlin-multiplatform-dev/compose-ios-migration.html
• https://www.jetbrains.com/help/kotlin-multiplatform-dev/compose-swiftui-integration.html

[Andrei Salavei]

Hi! We're working on further improving the handling of Interop gestures.
To handle touches within the ComposeUIViewController, we're using a custom CMPGestureRecognizer. There is no direct access to this class, but the Obj-C runtime will help.
So as a workaround - you can prioritise the scroll gesture recogniser in front of CMPGestureRecognizer to make the scroll working.

[Marcel]

@Andrei Salavei, how would you implement the workaround to prioritise the scroll?
I'm having the same issue following this approach:

ScrollView {
    VStack {
        cmpView

        swiftView1

        swiftView2

        // ...
    }
}

[Marcel]

It's currently getting on the way because we have two CMP views that take most of the initial vertical space of the scroll view, so unless you know you have to drag from the outside of their bounds nothing happens 😞

[Andrei Salavei]

Try to use CMP 1.8 (currently there is the RC available) - it improves significantly the situation with interop touches, as well as with scroll.

[Marcel]

Oh! Will give it a go in the next couple of hours and report back 🙏

[Marcel]

I'm already in 1.8.0 (androidx.compose.xxx), the non-RC stable version.
Did you mean 1.9.0-alpha01 by any chance?

[Marcel]

Silly me

[Marcel]

Of course, it's the jetbrains one org.jetbrains.compose 🤦

[Marcel]

Indeed, that solved it! Thanks @Andrei Salavei 😄

[Marcel]

I'm experiencing this now, not sure if it's related with the Compose update!