Question

当我尝试使用Firebase注销时抛出错误。我尝试了此解决方案，但不适用于注销link。 Flutter Navigator给出了链接中提到的错误，但该解决方案不起作用。

//Walk the array and add the needed data into another array
array_walk($csv, function($row) use (&$data) {

    if(!empty($data[$row[3]]))
    {
        $data[$row[3]] += (int) $row[8];
    }
    else {
        $data[$row[3]] = (int) $row[8];
    }
});

当我尝试使用AppBar的操作注销时，出现上述错误。我正在使用的代码。抖动导航器存在错误，但我无法修复。

E/flutter (17712): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: NoSuchMethodError: The method 'findAncestorStateOfType' was called on null.
E/flutter (17712): Receiver: null
E/flutter (17712): Tried calling: findAncestorStateOfType<NavigatorState>()
E/flutter (17712): #0      Object.noSuchMethod  (dart:core-patch/object_patch.dart:53:5)
E/flutter (17712): #1      Navigator.of 
package:flutter/…/widgets/navigator.dart:2115
E/flutter (17712): #2      Navigator.pushReplacement 
package:flutter/…/widgets/navigator.dart:1781
E/flutter (17712): #3      _HandleMainScreenState.checkAuthentication.<anonymous closure> 
package:monktree/main.dart:55
E/flutter (17712): #4      _rootRunUnary  (dart:async/zone.dart:1192:38)
E/flutter (17712): #5      _CustomZone.runUnary  (dart:async/zone.dart:1085:19)
E/flutter (17712): #6      _CustomZone.runUnaryGuarded  (dart:async/zone.dart:987:7)
E/flutter (17712): #7      _BufferingStreamSubscription._sendData  (dart:async/stream_impl.dart:339:11)
E/flutter (17712): #8      _BufferingStreamSubscription._add  (dart:async/stream_impl.dart:266:7)
E/flutter (17712): #9      _ForwardingStreamSubscription._add  (dart:async/stream_pipe.dart:134:11)
E/flutter (17712): #10     _MapStream._handleData  (dart:async/stream_pipe.dart:234:10)
E/flutter (17712): #11     _ForwardingStreamSubscription._handleData  (dart:async/stream_pipe.dart:166:13)
E/flutter (17712): #12     _rootRunUnary  (dart:async/zone.dart:1192:38)
E/flutter (17712): #13     _CustomZone.runUnary  (dart:async/zone.dart:1085:19)
E/flutter (17712): #14     _CustomZone.runUnaryGuarded  (dart:async/zone.dart:987:7)
E/flutter (17712): #15     _BufferingStreamSubscription._sendData  (dart:async/stream_impl.dart:339:11)
E/flutter (17712): #16     _DelayedData.perform  (dart:async/stream_impl.dart:594:14)
E/flutter (17712): #17     _StreamImplEvents.handleNext  (dart:async/stream_impl.dart:710:11)
E/flutter (17712): #18     _PendingEvents.schedule.<anonymous closure>  (dart:async/stream_impl.dart:670:7)
E/flutter (17712): #19     _rootRun  (dart:async/zone.dart:1180:38)

Answer 1

signout() {
    FirebaseAuth.instance.signOut().then((value) {
      print(widget.user.uid);
      Navigator.pop(context);
  }

将您的signout()更改为以上即可。然后，使用三元表达式可以检查用户令牌还是uid != null。

例如：

home: auth.isAuth ? AuthScreen() : TabsScreen(),

Firebase注销时，在null上调用了方法'findAncestorStateOfType'

1 个答案: