参数不匹配的闭包调用：函数'_MyAppState.build.<匿名闭包>'

Question

我在按下按钮时遇到此错误（编译时没有错误） 它在 ()=> answerQuestions(answer['score'])

处显示错误

匿名函数出了点问题，但我无法理解

The following NoSuchMethodError was thrown while handling a gesture:
Closure call with mismatched arguments: function '_MyAppState.build.<anonymous closure>'
Receiver: Closure: () => (int) => void
Tried calling: '_MyAppState.build.<anonymous closure>(8)'
Found: '_MyAppState.build.<anonymous closure>() => (int) => void'

import 'package:flutter/material.dart';

import './question.dart';
import './answer.dart';

class Quiz extends StatelessWidget {
  final List<Map<String, Object>> questions;
  final int questionIndex;
  final Function answerQuestions;

  Quiz({
    required this.questions,
    required this.answerQuestions,
    required this.questionIndex,
  });

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Question(
          questions[questionIndex]['questionText'] as String,
        ),
        ...(questions[questionIndex]['answers'] as List<Map<String, Object>>).map((answer) {
          return Answer(() => answerQuestions(answer['score']), answer['text'] as String);
        }).toList()
      ],
    );
  }
}

Answer 1

试试这个

import './question.dart';
import './answer.dart';

class Quiz extends StatelessWidget {
  final List<Map<String, Object>> questions;
  final int questionIndex;
  final Function answerQuestions;

  Quiz({
    required this.questions,
    required this.answerQuestions,
    required this.questionIndex,
  });

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Question(
          questions[questionIndex]['questionText'] 
        ),
        ...(questions[questionIndex]['answers'] as List<Map<String, Object>>).map((answer) {
          return Answer(() => answerQuestions(answer['score']), answer['text'] );
        }).toList()
      ],
    );
  }
}