Flutter:在TextField外部单击时调用函数

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('TextField点击示例'),
        ),
        body: GestureDetector(
          onTap: () {
            // 在这里调用你的函数
            print('点击了TextField外部');
          },
          child: Center(
            child: TextField(
              decoration: InputDecoration(
                hintText: '请输入文本',
              ),
            ),
          ),
        ),
      ),
    );
  }
}