이 코드에서 rangeError가 납니다.

[배성재]

숫자가 5보다 적어야 한다고 나오는데 원인을 아시는 분...




import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(home: MyApp()));
}

class MyApp extends StatefulWidget {
  MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  var total = 5;
  var name = ['김영숙', '홍길동', '피자집', '고기집', '아기집'];
  var like = [0, 0, 0, 0, 0];

  addName(a) {
    setState(() {
      name.add(a);
    });
  }

  addOne() {
    setState(() {
      total++;
    });
  }

  @override
  build(context) {
    return Scaffold(
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          showDialog(
              context: context,
              builder: (context) {
                return DialogUI(
                    state: total, state2: name, addOne: addOne, addName: addName);
              });
        },
      ),
      appBar: AppBar(title: Text(total.toString())),
      body: ListView.builder(
          itemCount: name.length,
          itemBuilder: (c, i) {
            return ListTile(
              leading: Text(like[i].toString()),
              title: Text(name[i]),
              trailing: ElevatedButton(
                child: Text('좋아요'),
                onPressed: () {
                  setState(() {
                    like[i]++;
                  });
                },
              ),
            );
          }),
    );
  }
}

class DialogUI extends StatelessWidget {
  DialogUI({Key? key, this.state, this.state2, this.addOne, this.addName})
      : super(key: key);
  final state;
  final state2;
  final addOne;
  final addName;
  var inputData = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Dialog(
        child: Container(
            padding: EdgeInsets.all(20),
            width: 400,
            height: 300,
            child:
                Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
              Text(
                'Contact',
                style: TextStyle(
                    fontWeight: FontWeight.bold,
                    fontSize: 40,
                    color: Colors.black),
              ),
              Text(
                '번호를 입력하세요',
                style: TextStyle(
                    fontWeight: FontWeight.bold,
                    fontSize: 20,
                    color: Colors.black),
              ),
              Container(width: 300, child: TextField(controller: inputData)),
              Row(
                mainAxisAlignment: MainAxisAlignment.end,
                children: [
                  ElevatedButton(
                      onPressed: () {
                        Navigator.of(context).pop();
                      },
                      child: Text("Cancel")),
                  ElevatedButton(
                      onPressed: () {
                        Navigator.of(context).pop();
                        addOne();
                        addName(inputData.text);
                      },
                      child: Text(state.toString()))
                ],
              ),
            ])));
  }
}

[codingapple]

name에 항목 1개 추가했는데 like는 1개 추가가 안되어서 그럴수도요

[글쓴이]

글