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发布于 2025-01-23 21:17:39 字数 1903 浏览 0 评论 0原文

我试图将选定项目的列表屏幕返回到先前的屏幕。 Android没问题，但iOS没有运气。正确的滑动未调用从列表中返回选定项目数组的OnWillPop函数。

我创建了一个CustommaterialPageroute：

 类CustommaterialPageroute扩展了材料pageroute {
   @protected
   bool获得hasscopedwillpopcallback {
  返回false;
}

 CustommaterialPageroute（{
   必需的widgetbuilder构建器，
   所需的路由设置，
   bool navialstate = true，
   bool fullscreendialog = false，
 }） ： 极好的（
       建筑商：建筑商，
       设置：设置，
       维护省：维护状态，
       FullScReendialog：FullScreendialog，
     ）；
}

我通过以下方式拨打列表屏幕：

  void _getTurnpointsfortask（）async {
   最终结果=等待Navigator.pushnamed（上下文，Thrpointsfortask.Routename，
   参数：Thrpointssearchinappbarscreen.task_turnpoint_option，）;
   如果（结果为列表＆lt; Thrpoint＆gt;）{//结果恢复为null。
      blocProvider.of＆lt; taskbloc＆gt;（上下文）.add（TurnpointSaddedTotAsKevent（result））;
   }
}

路由代码是：

  if（settings.name == thrpointsfortask.routename）{
         最终ViewOption = settings.arguments as String;
         返回CustommaterialPageroute（
           建筑商：（上下文）{
             返回Turnpointsfortask（ViewOption：ViewOption）;
           }，，
           设置：设置，
         ）；

}

列表屏幕构建以：

开头

  @Override
 小部件构建（buildContext上下文）{
     返回条件意外popscope（
     OnWillPop：_ONWILLPOP，
     syseaddcallback：widget._haschanges，//＆lt; _haschanges是正确的
     孩子：脚手架（
         钥匙：_scaffoldkey，
         ...

使用Android Back按钮调用的_ONWILLPOP代码，但不用iOS正确滑动：

  Future＆lt; bool＆gt; _ONWILLPOP（）ASYNC {
      if（widget.viewoption ==
         turnpointssearchinappbarscreen.task_turnpoint_option）{
      aCkaffoldMessenger.of（context）.removecurrentsnackbar（）;
      navigator.of（context）.pop（widget.turnpointsfortask）; ＆lt;＆lt;＆lt;返回物品阵列
      } 别的 {
          navigator.of（context）.pop（）;
      }
      返回true;
   }

我缺少什么？

原文

I am attempting to have a list screen return am array of selected items to a prior screen. No problem in Android, but no luck in iOS. The right swipe does not call the onWillPop function that returns an array of selected items from the list.

I have created a CustomMaterialPageRoute:

class CustomMaterialPageRoute extends MaterialPageRoute {
   @protected
   bool get hasScopedWillPopCallback {
  return false;
}

 CustomMaterialPageRoute({
   required WidgetBuilder builder,
   required RouteSettings settings,
   bool maintainState = true,
   bool fullscreenDialog = false,
 }) : super(
       builder: builder,
       settings: settings,
       maintainState: maintainState,
       fullscreenDialog: fullscreenDialog,
     );
}

I call the list screen via:

void _getTurnpointsForTask() async {
   final result = await Navigator.pushNamed(context,TurnpointsForTask.routeName,
   arguments: TurnpointsSearchInAppBarScreen.TASK_TURNPOINT_OPTION,);
   if (result is List<Turnpoint>) {  // result comes back null.
      BlocProvider.of<TaskBloc>(context).add(TurnpointsAddedToTaskEvent(result));
   }
}

The route code is:

if (settings.name == TurnpointsForTask.routeName) {
         final viewOption = settings.arguments as String;
         return CustomMaterialPageRoute(
           builder: (context) {
             return TurnpointsForTask(viewOption: viewOption);
           },
           settings: settings,
         );

}

The list screen build starts with:

 @override
 Widget build(BuildContext context) {
     return ConditionalWillPopScope(
     onWillPop: _onWillPop,
     shouldAddCallback: widget._hasChanges,  //<_hasChanges is true
     child: Scaffold(
         key: _scaffoldKey,
         ...

The _onWillPop code which is called with Android back button, but not with iOS right swipe:

 Future<bool> _onWillPop() async {
      if (widget.viewOption ==
         TurnpointsSearchInAppBarScreen.TASK_TURNPOINT_OPTION) {
      ScaffoldMessenger.of(context).removeCurrentSnackBar();
      Navigator.of(context).pop(widget.turnpointsForTask); <<< return array of items
      } else {
          Navigator.of(context).pop();
      }
      return true;
   }

What am I missing?

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温暖的光 2025-01-30 21:17:39

不确定这是最好的解决方案，但可以正常工作。

@override
Widget build(BuildContext context) {
if (Platform.isAndroid) {
  return ConditionalWillPopScope(
    onWillPop: _onWillPop,
    shouldAddCallback: true,
    child: _buildScaffold(context),
  );
} else {
  //iOS
  return GestureDetector(
    behavior: HitTestBehavior.deferToChild,  // if you have lower level drag/drop widgets
    onHorizontalDragUpdate: (details) {
      if (details.delta.direction >= 0) {
        _onWillPop();
      }
    },
    child: _buildScaffold(context),
  );
}

}

Not sure this is the best solution, but it works.

@override
Widget build(BuildContext context) {
if (Platform.isAndroid) {
  return ConditionalWillPopScope(
    onWillPop: _onWillPop,
    shouldAddCallback: true,
    child: _buildScaffold(context),
  );
} else {
  //iOS
  return GestureDetector(
    behavior: HitTestBehavior.deferToChild,  // if you have lower level drag/drop widgets
    onHorizontalDragUpdate: (details) {
      if (details.delta.direction >= 0) {
        _onWillPop();
      }
    },
    child: _buildScaffold(context),
  );
}

}

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