showBottomSheet 关闭时获取值

Question

showBottomSheet 关闭时如何发送值？

    var sheetController = showBottomSheet(
        context: context, builder: (context) => BottomSheet(
             onClosing:(){},
             builder: (BuildContext context) {
               return Container(
                      width:100.0,
                     child:FlatButton(
                            onPressed:(){
                             Navigator.pop(context,data);
                       }))
}));
        sheetController.closed.then((value) async {
         print(value);
      }
    });

我想获取数据，但它打印出null

Answer 1

将您的代码更改为：

var sheetController = showBottomSheet(
context: context, builder: (context) => displayBottomSheet(number));
sheetController.closed.then((value) async {
      await print(value);
}