Flutter 无法从抽屉中关闭alertDialog

单击抽屉上的元素时，我尝试显示对话框：

ListTile(
      title: Text('Home'),
      leading: Icon(Icons.home_outlined),
      onTap: () {
        Navigator.pop(context);
        showDialog(
            context: context,
            child: AlertDialog(
              title: Text('Confirm Sign out'),
              content: Text('Are  sure to sign out from app now?'),
              actions: [
                FlatButton(
                  onPressed: () {
                    Navigator.pop(context);
                  },
                  child: Text('Cancel'),
                ),
              ],
            ));
      },
    ),

抽屉小部件的完整代码：

但是，dilaog没有撤销，并且显示以下错误：

Looking up a deactivated widget's ancestor is unsafe.

At this point the state of the widget's element tree is no longer stable.

To safely refer to a widget's ancestor in its dispose() method, save a reference to the ancestor by calling dependOnInheritedWidgetOfExactType() in the widget's didChangeDependencies() method.

When the exception was thrown, this was the stack: 
#0      Element._debugCheckStateIsActiveForAncestorLookup.<anonymous closure> (package:flutter/src/widgets/framework.dart:3906:9)
#1      Element._debugCheckStateIsActiveForAncestorLookup (package:flutter/src/widgets/framework.dart:3920:6)
#2      Element.findAncestorStateOfType (package:flutter/src/widgets/framework.dart:4039:12)
#3      Navigator.of (package:flutter/src/widgets/navigator.dart:2218:40)
#4      Navigator.pop (package:flutter/src/widgets/navigator.dart:2107:15)
...
Handler: "onTap"
Recognizer: TapGestureRecognizer#016ce
  debugOwner: GestureDetector
  state: possible
  won arena
  finalPosition: Offset(140.5, 462.5)
  finalLocalPosition: Offset(9.5, 34.0)
  button: 1
  sent tap down

从onTap中删除Navigator.popcontext

为什么它不起作用

因为这个当前小部件从小部件树中弹出，所以在那个之后，当前小部件的上下文也将不可用

onTap: () {
           Navigator.pop(context); // Remove this to pop from here
          // Rest code 
       }

从onTap中删除Navigator.popcontext

为什么它不起作用

因为这个当前小部件从小部件树中弹出，所以在那个之后，当前小部件的上下文也将不可用

onTap: () {
           Navigator.pop(context); // Remove this to pop from here
          // Rest code 
       }

这对我有用

---

这对我很有用

我在取消对话框时没有收到任何异常，你能显示更多的代码，比如你正在使用的上下文吗？我刚刚编辑了代码我在取消对话框时没有收到任何异常，你能显示更多的代码，比如你正在使用的上下文吗？我刚刚编辑了代码

 Navigator.of(context,rootNavigator: true).pop();