Question

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我有一个项目,在Compose nav图中,我综合了托管目的地(屏幕)和对话目的地(对话点)。

样本 nav 图 :

NavHost(
    navController = navController,
    startDestination = "PostListScreen",
) {
    composable("PostListScreen") { PostListScreen() }
    dialog("EditPostDialog") { EditPostDialog() }
    dialog("SelectPhotosDialog") { SelectPhotosDialog() }
    composable("CameraScreen") { CameraScreen() }
}

我正从 PostListScreen 前往 Edit>EditPostDialog ,然后到 CameraScreen 。当我从 CameraScreen 返回时,我用一些图像, EditPostDialog 返回时,这个pops Edit>EdistPostDialog 已经不存在。

是否有办法将对话点和主机目的地都放在导航堆叠中, 这样这个问题就不会发生。我知道这是根据 rel="nofollow noreferrer>>>docs 的预期行为, 但我在项目中有不同的要求。

注:我已经尝试在正常的托管目的地内主持对话,但这也行不通。

Answer 1

我认为,你提到的在纳沃霍斯特宣布对话会很难推翻它的行为,所以你为什么不在PostListScreen () 中创建它, 并添加一个状态, 表明该对话框是否应该可见, 并用这个方式包起来 :

if(shouldBeVisible){
   BasicAlertDialog()
}

and shouldBeVisible is just a remember{mutableStateOf(false)} and you change it for example when you want to navigate to the dialog so instead you just show it in the same screen then anvigate to the CameraScreen from the dialog like that you will be also able to decide if the dialog should be visible or not based on the data you retuned with from CameraScreen

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