当我删除列表中的第一个 TextFormField 时，TextFormField initialValue 获取下一个字段的值

Question

首先，我很抱歉这个标题，它有点难以理解。

1 - 我动态创建表单的 TEXTFORMFIELD。
2 - 当我尝试删除 TEXTFORMFIELD（最后一个除外）时，它被删除并且 PROVIDER 中的数据发生更改，但下一个 TEXTFORMFIELD 采用已删除的 TEXTFORMFIELD 的 INITIALVALUE。

小部件代码：

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

import '../providers/players.dart';

class PlayersNameForm extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final players = Provider.of<Players>(context);
    final playersData = players.players;
    final playersCount = players.count();

    return Form(
      child: Column(
        children: List.generate(playersCount, (index) =>
          Container(
            child: TextFormField(
              initialValue: playersData[index].name,
              decoration: InputDecoration(
                labelText: 'Joueur ' + (index + 1).toString(),
                suffixIcon: IconButton(
                  icon: Icon(
                    Icons.delete_outline,
                  ),
                  onPressed: () {
                    players.removePlayerByIndex(index);
                  },
                ),
              ),
            ),
          )
        ),
      ),
    );
  }
}

提供商代码：

import 'package:flutter/material.dart';

import './player.dart';

class Players with ChangeNotifier{
  List<Player> _players = [
    Player(
      name: 'Player A'
    ),
    Player(
      name: 'Player B'
    ),
    Player(
      name: 'Player C'
    ),
    Player(
      name: 'Player D'
    ),
  ];

  List<Player> get players {
    return [..._players];
  }

  int count(){
    return _players.length;
  }

  void addPlayer(){
    int count = this.count();

    if(count < 4){
      _players.add(Player(name: ''));
      notifyListeners();
    }
  }

  void removePlayer(){
    int count = this.count();

    if(count > 2) {
      _players.removeLast();
      notifyListeners();
    }
  }

  void removePlayerByIndex(index){
    _players.removeAt(index);
    notifyListeners();
  }

}

Answer 1

 if(controller().selectedProduct[index].category!= "other")Container(
                          height: h * 0.1,
                            width: w *
                                0.8, // You can adjust the width as needed
                            child: TextField(
                              // controller: controller()
                              //     .quantityControllers[index],
                              textAlignVertical:
                              TextAlignVertical.center,
                              // controller: TextEditingController(
                              //   text: controller().selectedProduct[index].qty.toString(),
                              // ),
                              // autovalidateMode:
                              // AutovalidateMode.always,initialValue: "",

                              decoration: InputDecoration(
                                label: Text("Category"),labelStyle: poppinsTextStyle(fontSize: t*0.6),
                                border: UnderlineInputBorder(),
                              ),
                              // cursorHeight: h * 0.03,
                              style: TextStyle(fontSize: t * 0.6),
                              // keyboardType: TextInputType
                              //     .number, // To bring up the number keyboard
                              textAlign: TextAlign.start,
                              // onChanged: (value) {
                              //   print("askcd");
                              //   controller().updateQuantityFromField(index,); // Implement this method in the controller to update the quantity
                              // },
                              onChanged: (value) {
                                controller().updateCategoryForProduct(index, value);
                              },
                              // validator: (value) {
                              //   if (value == "") {
                              //     // controller().updateQuantityFromField(index);
                              //     return "Required";
                              //   }
                              // },
                            ),
                          ),
                          SizedBox(height: h*0.000001,),
                          if(controller().selectedProduct[index].discount!= null)Container(
                            height: h * 0.1,
                            width: w *
                                0.8, // You can adjust the width as needed
                            child: TextField(
                              // controller: controller()
                              //     .quantityControllers[index],
                              textAlignVertical:
                              TextAlignVertical.center,
                              // initialValue: "",
                              // controller: TextEditingController(
                              //   text: controller().selectedProduct[index].qty.toString(),
                              // ),
                              // autovalidateMode:
                              // AutovalidateMode.always,

                              decoration: InputDecoration(
                                label: Text("Discount"),labelStyle: poppinsTextStyle(fontSize: t*0.6),
                                border: UnderlineInputBorder(),
                              ),
                              // cursorHeight: h * 0.03,
                              style: TextStyle(fontSize: t * 0.6),
                              // keyboardType: TextInputType
                              //     .number, // To bring up the number keyboard
                              textAlign: TextAlign.start,
                              // onChanged: (value) {
                              //   print("askcd");
                              //   controller().updateQuantityFromField(index,); // Implement this method in the controller to update the quantity
                              // },
                              onChanged: (value) {

                                controller().updateDiscontForProduct(index, value);
                              },
                              // validator: (value) {
                              //   if (value == "") {
                              ////     controller().updateQuantityFromField(index);
                              // return "Required";
                              // }
                              // },
                            ),
                          ),

这是代码，当我向折扣添加值然后切换类别文本字段，然后折扣值传递到类别时，我遇到了与您相同的错误（几乎与您相同的问题）。在我看来，flutter 会根据其位置考虑没有控制器的文本字段，因此我添加了最小尺寸接近 0 的大小框，瞧，我的问题解决了

视频：https://jmp.sh/s/3ISVTDHDwgq4BMnVHnXg

希望这有帮助！！