Hi everyone .. Im Using Voyager as my Navigation .. However i cant swipe to go back on ios target .. is there a way or sample repo to implement back gesture on iosApp ? thank you ..

cc @SrSouza

same here

im able to imitate back gesture manually with something like this

abstract class BaseScreen : Screen, BaseScreenContent, ScreenLifecycleOwner {

    @Composable
    override fun Content() {
        val navigator = LocalNavigator.currentOrThrow
        var offsetState by remember { mutableFloatStateOf(0f) }
        Box(
            modifier = Modifier.background(Color.White)
        ) {
            ScreenContent()
            if (Platform.os == PlatformOS.iOS){
                Box(
                    modifier = Modifier
                        .fillMaxHeight()
                        .width(20.dp)
                        .pointerInput(Unit){
                            detectHorizontalDragGestures(
                                onDragEnd = {
                                    if (offsetState > 100) {
                                        if (navigator.items.size > 1) navigator.pop()
                                    }
                                    offsetState = 0f
                                }
                            ) { _, dragAmount ->
                                if (offsetState < 0) return@detectHorizontalDragGestures
                                offsetState += dragAmount
                            }
                        }
                )
            }
        }
    }
}

private interface BaseScreenContent {
    @Composable
    fun ScreenContent()
}

@Angga Ardinata wow nice! I will try this. Did you only apply this to a BaseScreen and does that work for all? or you apply to each screen?

How do you create a new screen ? If just class HomeScreen : Screen {} Change the implementation of Screen with BaseScreen

Right now I dont have a BaseScreen yet

I will not work like ios back gesture where you can peek previous screen .. bit for me atleast user can goback with swipe 😁

ahh yes that is all I need as well actually 😄

https://github.com/adrielcafe/voyager/issues/144 .. here the issue for back gesture

hello @Angga Ardinata just want let you know I managed to implement the back gesture thanks to your help. Hopefully voyager adds the peek previous screen but your solution was a great alternative as well! 🙇

@mangubatrj Wow glad that im actually helping someone with my limited knowledge

I have not being able to contribute to Voyager lately, but PR are welcome always. Suggestion folks, instead of using

BaseScreen

you folks could just add this component to the main Navigation Content. Example:

Navigator(...) { navigator ->
   Box(..) {
     CurrentScreen()
     if (Platform.os == PlatformOS.iOS){
        ...
     }
   }
}

About previous screen peek, I need to validate about recomposition of it, but, Voyager Stack is built with SnapshotStateList, so, in practice, something like this:

val previousScreen = remember(navigator) {
  derivedStateOf {
    navigator.toList().getOrNull(navigator.size - 2)
  }
}

But if this does not work properly we could easily add

peekPreviousItem

on it.

Thank you @SrSouza will definitely check this out! ❤️