Flutter -如何实现一个“草率”的后退手势来返回到上一个屏幕？

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

class MyScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onHorizontalDragEnd: (DragEndDetails details) {
        if (details.primaryVelocity < 0) {
          // 用户向右滑动
          Navigator.pop(context);
        }
      },
      child: Scaffold(
        appBar: AppBar(
          title: Text('My Screen'),
        ),
        body: Center(
          child: Text('Hello, World!'),
        ),
      ),
    );
  }
}