在Flutter窗体小部件中动态添加字段

import 'package:flutter/material.dart';

class DynamicFieldsWidget extends StatefulWidget {
  @override
  _DynamicFieldsWidgetState createState() => _DynamicFieldsWidgetState();
}

class _DynamicFieldsWidgetState extends State<DynamicFieldsWidget> {
  List<String> fields = [];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Dynamic Fields'),
      ),
      body: ListView.builder(
        itemCount: fields.length + 1,
        itemBuilder: (context, index) {
          if (index == fields.length) {
            return ListTile(
              title: Text('Add Field'),
              onTap: () {
                setState(() {
                  fields.add('Field ${fields.length + 1}');
                });
              },
            );
          } else {
            return ListTile(
              title: Text(fields[index]),
              // Add your custom field widget here
            );
          }
        },
      ),
    );
  }
}