'!_debugLocked'：不正确

Question

功能：

    navigateToAudioScreen(file, aPlay) async {
//    await Future.delayed(Duration(seconds: 3));
    WidgetsBinding.instance!.addPostFrameCallback((_) async {
      await Future.delayed(Duration(seconds: 3));
      Navigator.pop(context, MaterialPageRoute(builder: (context) {
         return AudioPlayerScreen(
          a_play: aPlay,
          a_file: file,
        );
      }));
    }
    );
  }

错误：

flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: 'package:flutter/src/widgets/navigato
r.dart': Failed assertion: line 4842 pos 12: '!_debugLocked': is not true.
E/flutter (11069): #0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:47:61)
E/flutter (11069): #1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:36:5)
E/flutter (11069): #2      NavigatorState.pop (package:flutter/src/widgets/navigator.dart:4842:12)
E/flutter (11069): #3      Navigator.pop (package:flutter/src/widgets/navigator.dart:2432:27)
E/flutter (11069): #4      _HomePageState.navigateToAudioScreen.<anonymous closure> (/Screens/Home.dart:95
:17)

尝试：

1. 尝试添加调度程序绑定
2. 尝试添加小部件绑定
3. 尝试添加未来延迟

Answer 1

此错误可能是因为 Navigator.pop() 方法不将 MaterialPageRoute 作为参数，因此引发此错误。
您可以在以下位置查看更多信息： https://api.flutter.dev/ flutter/widgets/Navigator/pop.html