强制启用

导入软件包:main.dart文件中的import 'package:flutter/services.dart';

Import package: import 'package:flutter/services.dart'; in main.dart file

1.横向模式:

// Set landscape orientation
SystemChrome.setPreferredOrientations([
  DeviceOrientation.landscapeLeft,
  DeviceOrientation.landscapeRight,
]);

2.纵向模式:

// Set portrait orientation
SystemChrome.setPreferredOrientations([
   DeviceOrientation.portraitDown,
   DeviceOrientation.portraitUp,
]);