在Flutter应用程序中取消向后滑动手势时的键盘

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Gesture and Focus Example')),
        body: MyGestureDetector(),
      ),
    );
  }
}

class MyGestureDetector extends StatefulWidget {
  @override
  _MyGestureDetectorState createState() => _MyGestureDetectorState();
}

class _MyGestureDetectorState extends State<MyGestureDetector> {
  final FocusNode _focusNode = FocusNode();

  @override
  void dispose() {
    _focusNode.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onHorizontalDragEnd: (details) {
        if (details.primaryVelocity! > 0) {
          // 向右滑动
          _focusNode.unfocus();
        }
      },
      child: Container(
        padding: EdgeInsets.all(20),
        child: TextField(
          focusNode: _focusNode,
          decoration: InputDecoration(
            labelText: 'Enter text',
          ),
        ),
      ),
    );
  }
}