导航到其他页面并返回后未显示Flutter Popupmenu

问题描述

所以我有一个popupmenu，可以在我的代码中很好地实现，但是主要的问题是，如果我导航到具有bottomnavigation的几页，然后将页面返回到popupmenu的页面以单击popupmenu冻结并且不显示，直到我终止该应用，然后重新开始。下面是我的popupmenu代码：

 void stateChanged(bool isShow) {
  print('menu is ${isShow ? 'showing' : 'closed'}');
}

void onClickMenu(MenuItemProvider item) {
  print('Click menu -> ${item.menuTitle}');
}

void ondismiss() {
  print('Menu is dismiss');
}

PopupMenu.context = context;
void showPopup(Offset offset) {
  PopupMenu menu = PopupMenu(
    // backgroundColor: Colors.teal,// lineColor: Colors.tealAccent,maxColumn: 3,items: [
        MenuItem(title: 'Add User',image: Icon(Icons.person_add,color: Colors.white)),MenuItem(title: 'All',image: Icon(Icons.group_work,MenuItem(title: 'Local Employee',image: Icon(Icons.group,color: Colors.white,)),MenuItem(title: 'Hired Employee',image: Icon(Icons.person_pin,MenuItem(title: 'Interview Form',image: Icon(Icons.format_indent_increase,],onClickMenu: onClickMenu,stateChanged: stateChanged,ondismiss: ondismiss);
  menu.show(rect: Rect.fromPoints(offset,offset));
}

我的onclick如下：

GestureDetector(
                onTapUp: (TapUpDetails details) {
                  showPopup(details.globalPosition);
                },child:Container(
                decoration: Boxdecoration(

                    border: Border.all(
                      color: Colors.grey,),borderRadius: BorderRadius.all(Radius.circular(5))
                ),width: 60.0,// color: Colors.red,child: Column(
                  children: <Widget>[
                    SizedBox(height: 2,Icon(Icons.group,size: 20,SizedBox(height: 2,Expanded(child:Center(child:Text("Employee",style: TextStyle(fontFamily: 'Montserrat',fontSize: 8.0,color: Colors.black),)
                  ],)

            )),

我的底部导航栏如下：

return Scaffold(


    body:CupertinoTabScaffold(
    tabBar: CupertinoTabBar(
      //backgroundColor: Colors.black,currentIndex: _currentIndex,onTap: onTabTapped,items: [
        BottomNavigationBarItem(
          icon: Icon(Icons.home,title: Text("Home"),BottomNavigationBarItem(
          icon: Icon(Icons.event,title: Text("Event"),BottomNavigationBarItem(
          icon: Icon(Icons.announcement,title: Text("Announcement"),BottomNavigationBarItem(
          icon: Icon(Icons.notifications,title: Text("Notification"),tabBuilder: (BuildContext context,int index) {
      return CupertinoTabView(
        builder: (BuildContext context) {
          return SafeArea(
            top: false,bottom: false,child: CupertinoApp(
              home: CupertinopageScaffold(
                resizetoAvoidBottomInset: false,child: _children[_currentIndex],);
        },);
    }
));

 void onTabTapped(int index) {
   setState(() {
     _currentIndex = index;
   });
 }

解决方法

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