颤振如何禁用横向方向？

Question

我想禁用横向模式。我尝试使用以下代码仅允许纵向模式。但这不适用于我的物理设备。该如何解决？

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  SystemChrome.setPreferredOrientations(
      [DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]);
  runApp(MyApp());
}

Answer 1

您需要将代码粘贴到Widget build()中。考虑此answer以获得更多详细信息

class MyApp extends StatelessWidget {
    @override
    Widget build(BuildContext context) {
      SystemChrome.setPreferredOrientations([
        DeviceOrientation.portraitUp,
        DeviceOrientation.portraitDown,
      ]);
      return new MaterialApp(...);
    }
  }