Flutter - Implement an async function from showBottomSheet-CodePudding

I have a function that call showModalBottomSheet which I need to remove the barrier.

  Future<..> popup() async => await showModalBottomSheet<..>(
    ...
      builder : (BuildContext context){
        ...
        Navigator.of(context).pop(..);
        ...
      }
    );

I have two options. Since I don't want to use different Scaffold, that leaves me to use showBottomSheet instead. But I also want to keep my function as async because I need the BottomSheet to return a value on it's dismiss. showBottomSheet returns PersistentBottomSheetController not a Future. I have no idea how to implement a Future returning function from it, the way I did with showModalBottomSheet.

 Future<..> popup() async{
   ???
   Scaffold.of(context).showBottomSheet(..)<..>(
     (BuildContext context){
       ...
       Navigator.of(context).pop(..);
       ...
     }
   );
   ???
 }

Greatly appreciate the help. Thank you.

CodePudding user response：

You can't return Future from showModalBottomSheet instead you can use isClosed to check if bottom sheet closed and this getter return future.

you can use it like:

Future<bool> popup(BuildContext context) async{
    PersistentBottomSheetController myModal = showBottomSheet(
      context: context,
      builder: (context) {
        return const Text("Modal");
      },
    );
    Future<bool> isClosed = await myModal.closed;
    return isClosed;
  }