问题描述
我的自定义底页是这样的：
Future<PersistentBottomSheetController?> _init(BuildContext context) async {
return showModalBottomSheet(
context: context,isdismissible: isdismissable,enableDrag: canDragToClose,isScrollControlled: isScrollable,builder: (_) {
if (_isDraggble) {
return DraggableScrollableSheet(
initialChildSize: initialChildSize,maxChildSize: maxChildSize,minChildSize: minChildSize,builder: (context,scrollController) {
return body(context,controller: scrollController);
},);
}
return WillPopScope(
onWillPop: () async => canPop,child: body(context),);
},);
}
我正在使用以下代码打开工作表：
class StoryNameAndAccessLevel extends StatelessWidget {
const StoryNameAndAccessLevel({
Key? key,required this.scaler,required this.title,}) : super(key: key);
final HwScaleUtil scaler;
final String title;
@override
Widget build(BuildContext context) {
ValueNotifier<AccessRole> _selectedItem = ValueNotifier(AccessRole.norole);
return ValueListenableBuilder(
valueListenable: _selectedItem,AccessRole value,child) {
return Padding(
padding: scaler.insets.symmetric(vertical: 1),child: Column(
crossAxisAlignment: CrossAxisAlignment.start,children: [
HwText(
title,style: HwTextStyle.header55,),GestureDetector(
onTap: () {
HwBottomModal.draggable(
ctx: context,builder: (controller) =>
SetCustomAccessLevel(controller,title),initialChildSize: .65,);
},child: HwText(
value == AccessRole.norole
? 'set access level'
: returnRole(value),style:
HwTextStyle.subTitle.copyWith(color: Color(0xff00a7b4)),)
],);
});
}
}
String returnRole(AccessRole role) {
if (role == AccessRole.Admin) return 'Admin';
if (role == AccessRole.Manager) return 'Manager';
if (role == AccessRole.ViewOnly) return 'View only';
if (role == AccessRole.NoAccess) return 'No access';
return 'set access level';
}
这个类用于以下屏幕：
class CustomAccess extends StatelessWidget {
@override
Widget build(BuildContext context) {
final model = context.watch<StoryState>();
final scaler = context.scaler;
return ValueListenableBuilder<Future<List<Story>>?>(
valueListenable: model.storiesRef,future,child) {
return FutureBuilder<List<Story>>(
future: future,task) {
if (task.connectionState == ConnectionState.waiting)
return AppSpinner();
if (task.hasError) {
return DashboardErrorState.noTitle(
subTitle: parseError(
task.error,"We Could not fetch your stories at this time,due to an error",onRetry: () {
model.refreshstories();
},);
}
if (!task.hasData || (task.data?.isEmpty ?? true)) return child!;
return Refreshindicator(
child: CustomScrollView(
shrinkWrap: true,slivers: [
SliverPadding(
padding:
scaler.insets.symmetric(horizontal: 0,vertical: 2),sliver: SliverList(
delegate: SliverChildBuilderDelegate(
(_,index) {
return StoryNameAndAccessLevel(
scaler: scaler,title:
'${task.data![index].name},);
},childCount: task.data?.length ?? 0,],onRefresh: () async {
model.refreshstories();
},);
},child: const StoryEmptyState(),);
}
}
最后我的小部件在底部打开
class SetCustomAccessLevel extends StatelessWidget {
final ScrollController controller;
ValueNotifier<AccessRole> _selectedItem = ValueNotifier(AccessRole.norole);
final _scaffoldKey = GlobalKey<ScaffoldState>();
String title;
SetCustomAccessLevel(this.controller,this.title);
List<CustomradioTile> _userAccessRole = [
CustomradioTile(
title: 'Admin',subtitle:
'Full access to managing stories.',selectedItem: AccessRole.Admin,CustomradioTile(
title: 'Manager',subtitle:
'Limited editing access ',selectedItem: AccessRole.Manager,CustomradioTile(
title: 'View Only',subtitle:
'Can view but cannot edit ',selectedItem: AccessRole.ViewOnly,CustomradioTile(
title: 'No Access',selectedItem: AccessRole.NoAccess,];
@override
Widget build(BuildContext context) {
return Scaffold(
key: _scaffoldKey,appBar: HwAppBar(
title: 'Set Access Level',implyLeading: false,actions: [
IconButton(
icon: SvgPicture.asset(
HwSvgs.closeIcon,onpressed: () {
Navigator.pop(context,_selectedItem);
},body: ListView(
children: [
Center(
child: HwText(
title,style: HwTextStyle.black.copyWith(
fontSize: 56,color: HwColors.black,fontWeight: FontWeight.bold),ValueListenableBuilder(
valueListenable: _selectedItem,child) {
return Padding(
padding: const EdgeInsets.all(8.0),child: Container(
child: ListView.builder(
shrinkWrap: true,physics: NeverScrollableScrollPhysics(),itemCount: _userAccessRole.length,itemBuilder: (context,index) {
return Column(
children: [
HwSizedBox(
height: 3,InkWell(
onTap: () {
_selectedItem.value =
_userAccessRole[index].selectedItem;
},child: Container(
decoration: Boxdecoration(),child: CustomradioTile(
selectedItem:
_userAccessRole[index].selectedItem,radio: value ==
_userAccessRole[index].selectedItem
? SvgPicture.asset(HwSvgs.radioCheck)
: SvgPicture.asset(
HwSvgs.unActiveRadioButton),title: _userAccessRole[index].title,subtitle: _userAccessRole[index].subtitle,);
}),));
}
}
所以我想要做的是，当用户点击一个单独的故事时，会出现一个底部表格，用户可以在其中选择管理员、经理、仅查看或无访问权限的选项之一，当他们关闭底部表格时，那个特定的故事应该有一个文本显示它被选中的角色。
现在对于我的代码，当我关闭底部表时，我收到了 'ValueNotifier<AccessRole>' is not a subtype of type 'PersistentBottomSheetController<dynamic>?' of 'result' 的错误。
那么我如何才能有效地将这些数据从 modalbottomsheete 传递到父屏幕？
解决方法
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