I am currently writing a multi-platform mobile application for a conference (Android and iOS, both w...

# compose-ios

[Michael Paus]

I am currently writing a multi-platform mobile application for a conference (Android and iOS, both with Compose GUI). The app itself already works perfectly but I now have to integrate a QR-code scanner into it. I also have that working for Android but I have to admit that I have no idea how to do that for iOS. Could anybody provide me with an example of that? I also do not yet have a real iOS device, so I hope that I can test that with the iOS simulator like I did for Android (although I do of course have several Android devices for testing 😉).

[rocketraman]

I have used this SwiftUI library: https://github.com/twostraws/CodeScanner. Might give you some ideas even if you don't use it directly.

[Michael Paus]

Could this be used directly from Kotlin? As I said I did not do the GUI in SwiftUI.

[rocketraman]

Not that project directly, no. But it might give you some ideas you can use to call the underlying APIs.

[Landry Norris]

Compose for iOS doesn't currently support UIKit integration.

[Landry Norris]

You can potentially get the camera pixel data and use drawBehind to draw into a native canvas. Keep in mind that iOS simulators do not have camera support, however.

[tvtan]

@Michael Paus do you have a solution for this case? my app has a same use case but I don’t know I can include an iOS UIController inside compose or not

[Michael Paus]

Not yet, but at the moment I am also busy with other stuff which is holding me up.

[Landry Norris]

If you look at my experimental repo github.com/LandryNorris/PlatformView, I found a way to draw a UIView into compose for iOS. It currently requires you to invalidate it manually, but for a camera, that should happen every frame, so you could just have a timer increment a variable.