颤振列表视图

Question

我有一张评分表。所以我必须在每个文本字段中保存不同的标记。尝试过控制器，但没有用。如果您有任何灵魂，请帮助。

截图：https://ibb.co/CbsBQMy

Answer 1

为每个标记创建不同的控制器，最后处理它

import 'package:flutter/material.dart';

class MarkEntryForm extends StatefulWidget {
  const MarkEntryForm({super.key});

  @override
  _MarkEntryFormState createState() => _MarkEntryFormState();
}

class _MarkEntryFormState extends State<MarkEntryForm> {
  final TextEditingController _mathsController = TextEditingController();
  final TextEditingController _scienceController = TextEditingController();
  final TextEditingController _englishController = TextEditingController();

  double _mathsMark = 0;
  double _scienceMark = 0;
  double _englishMark = 0;

  void _saveMarks() {
    _mathsMark = double.parse(_mathsController.text);
    _scienceMark = double.parse(_scienceController.text);
    _englishMark = double.parse(_englishController.text);

    // Save the marks to the database or do other processing here
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Mark Entry Form'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            TextField(
              controller: _mathsController,
              keyboardType: TextInputType.number,
              decoration: const InputDecoration(
                labelText: 'Maths',
              ),
            ),
            TextField(
              controller: _scienceController,
              keyboardType: TextInputType.number,
              decoration: const InputDecoration(
                labelText: 'Science',
              ),
            ),
            TextField(
              controller: _englishController,
              keyboardType: TextInputType.number,
              decoration: const InputDecoration(
                labelText: 'English',
              ),
            ),
            const SizedBox(height: 16),
            ElevatedButton(
              onPressed: _saveMarks,
              child: const Text('Save Marks'),
            ),
          ],
        ),
      ),
    );
  }
}

这是一个存储一组标记的示例程序，您可以将其更改为 LIst 以存储更多数据，我们也可以使用 listview.builder 来显示它