小编tuf*_*a97的帖子

我正在使用themoviedb API构建一个简单的电影目录,但是我遇到了一个我无法解决的问题.问题是获取后的结果总是未定义的.

我尝试使用方法componentWillMount来获取数据并在此方法中设置状态,但它不起作用.我试图获取内部构造函数,没有结果.

到目前为止这是我的代码

import React, { Component } from 'react';
import Header from './components/Header';
import MovieList from './components/MovieList';
import Footer from './components/Footer';

const MOVIE_API = "http://api.themoviedb.org/3/discover/movie?api_key=72049b7019c79f226fad8eec6e1ee889&language=en-US&sort_by=release_date.desc&include_adult=true&include_video=false&page=2&primary_release_year=2018";

//class
class App extends Component {
  constructor(props){
    super(props);

    this.state = {
      movies: [],
      movieName: ''
    }
  }


  componentWillMount(){
    this.fetchMovie();
  }


//fetching movie
  fetchMovie = () =>{
    const req = new Request(MOVIE_API, {
      method: 'GET',
      cache: 'default'
    });

    fetch(req).then(response =>{
      return response.json();
    }).then(data =>{
      console.log(data); //REF 1;
      this.setState({
        movies: data
      });
    }).catch(err => { …