Flutter：如何按需设置和锁定屏幕方向

首先导入服务包：

import 'package:flutter/services.dart';

这将使您可以访问

SystemChrome

"Controls specific aspects of the operating system'sgraphical interface and how it interacts with the application."

加载小部件时，请执行以下操作：

@overridevoid initState(){  super.initState();  SystemChrome.setPreferredOrientations([      DeviceOrientation.landscapeRight,      DeviceOrientation.landscapeLeft,  ]);}

然后当我离开页面时，将其恢复为正常状态，如下所示：

@overridedispose(){  SystemChrome.setPreferredOrientations([    DeviceOrientation.landscapeRight,    DeviceOrientation.landscapeLeft,    DeviceOrientation.portraitUp,    DeviceOrientation.portraitDown,  ]);  super.dispose();}