import 'package:flutter/services.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();//不加这个强制横/竖屏会报错
SystemChrome.setPreferredOrientations([ // 强制竖屏
DeviceOrientation.portraitUp,
DeviceOrientation.portraitDown
]);
// SystemChrome.setPreferredOrientations([ //强制横屏
// DeviceOrientation.landscapeLeft,
// DeviceOrientation.landscapeRight
// ]);
runApp(new MyApp());
}