我正在创建一个应用程序，我是扑扑，飞镖的新手。我在“上下文”中有问题。我想替换页面/屏幕 onTab()。但我有以下错误：
> ?????? Exception caught by gesture ???????????????????????? The
> following NoSuchMethodError was thrown while handling a gesture: The
> method 'findAncestorStateOfType' was called on null. Receiver: null
> Tried calling: findAncestorStateOfType<NavigatorState>()
这是我的代码：
class Theorytest extends StatelessWidget {
Widget customcard(String testName ){
return Padding(
padding: EdgeInsets.all(10.0),
child: InkWell(
onTap: (){
Navigator.of(context).pushReplacement(MaterialPageRoute(
builder: (context) => GetTestData(),
),
);
},
child: Material(
borderRadius: BorderRadius.circular(50.0),
elevation: 20.0,
child : Container(
child: Column(
children : <Widget>[
Padding(
padding: EdgeInsets.fromLTRB(5.0, 20.0, 10.0, 20.0),
child: …如何检索构建文件夹并运行应用程序。我试过以下命令。
flutter run
flutter create appbundle
但一切都是徒劳的。现在我无法在模拟器上运行我的应用程序，也无法构建 apk 文件。
请帮忙，我是新来的。这里是日志。
Invalid depfile: H:\appsss\app\prepare_yourself_for_exams\.dart_tool\flutter_build\902f3633de5fdde27e4ce7360b2460ff\kernel_snapshot.d
Invalid depfile: H:\appsss\app\prepare_yourself_for_exams\.dart_tool\flutter_build\902f3633de5fdde27e4ce7360b2460ff\kernel_snapshot.d
Compiler message:
/H:/InstallationPath/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-7.3.0/lib/src/top_level.dart:1:8: Error:
Not found: 'dart:html'
import 'dart:html';
^
/H:/InstallationPath/flutter/.pub-cache/hosted/pub.dartlang.org/js-0.6.1+1/lib/js.dart:8:1: Error: Not found: 'dart:js'
export 'dart:js' show allowInterop, allowInteropCaptureThis;
^
/H:/InstallationPath/flutter/.pub-cache/hosted/pub.dartlang.org/js-0.6.1+1/lib/js_util.dart:8:1: Error: Not found: 'dart:js_util'
export 'dart:js_util';
^
/H:/InstallationPath/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-7.3.0/lib/src/auth.dart:306:25: Error: The method 'allowInterop' isn't defined for the class 'Auth'.
- 'Auth' is from 'package:firebase/src/auth.dart' ('/H:/InstallationPath/flutter/.pub-cache/hosted/pub.dartlang.org/firebase-7.3.0/lib/src/auth.dart').
Try correcting the name to the name of an existing method, or defining a method named 'allowInterop'.
var …