我不是一個(gè)非常有經(jīng)驗(yàn)的開(kāi)發(fā)人員，所以我可能缺少一些簡(jiǎn)單的東西。我有一系列從redux狀態(tài)（this.props.assignments.assignments）中獲取的對(duì)象。嘗試在渲染返回中調(diào)用displayAssignments（）時(shí)，我得到的.map（）不是函數(shù)。但是，我有一個(gè)附加到onClick的函數(shù)，該函數(shù)執(zhí)行相同的映射并將“名稱”記錄到控制臺(tái)中，并且該函數(shù)按預(yù)期工作（當(dāng)我注釋掉displayAssignments（）時(shí)）。我不知道為什么.map（）可以在我的onClick而不是displayAssignments上工作。我加入了showAssignments函數(shù)只是為了測(cè)試我的數(shù)據(jù)是否可以被映射...這使我更加困惑，因?yàn)槟强梢怨ぷ?..import React, { Component } from 'react';import PropTypes from 'prop-types';import { connect } from 'react-redux';import { getAssignments } from '../../Actions/assignmentActions.js';class Assignments extends Component {  componentDidMount() {    this.props.getAssignments();  };  showAssignments = () => {    console.log(this.props.assignments.assignments);    this.props.assignments.assignments.map(assignment => (      console.log(assignment.name)    ));  };  displayAssignments = () => {    this.props.assignments.assignments.map(assignment => {      return (        <div>          <p>{assignment.name}</p>          <p>{assignment.description}</p>        </div>      )    })  };  render() {    return (      <div>        <h1>Assignments</h1>        <button onClick={this.showAssignments}>Click Me</button>        {this.displayAssignments()}      </div>    );  };};Assignments.propTypes = {  getAssignments: PropTypes.func.isRequired,  assignments: PropTypes.object.isRequired};const mapStateToProps = state => ({  assignments: state.assignments});export default connect(mapStateToProps, { getAssignments })(Assignments);預(yù)期：通過(guò)映射呈現(xiàn)作業(yè)的名稱和說(shuō)明實(shí)際：獲取this.props.assignments.assignments.map不是函數(shù)