微信小程序前端promise封装代码实例

时间:2020-05-17 达叔小生人气:0

这篇文章主要介绍了微信小程序前端promise封装代码实例,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

代码如下

config.js

const config = {
   base_url_api : "https:/https://img.qb5200.com/download-x/douban.uieee.com/v2/movie/",
}

export {config}

http.js

import { config } from "../config";
class HTTP {
  requset({ url, method = "GET", data = {} }) {
    const promise = new Promise((resolve, reject) => {
      wx.request({
        url: config.base_url_api + url,
        data,
        method,
        header: {
          'Content-Type': 'json'
        },
        success: res => {
          //状态码 toString() 转成字符串
          const statusCode = res.statusCode.toString();

          if (statusCode.startsWith("2")) {
            resolve(res.data)
          } else {
            this._show_error();
          }
        },
        fail: res => {
          reject(err);
          this._show_error();
        }
      })
    })
    return promise;
  }
  _show_error() {
    wx.showToast({
      title: '网络错误',
      icon: 'none'
    })
  }
}
export { HTTP }

model/movie.js

import {HTTP} from "../utils/http";
class MovieModel extends HTTP{
  getInTheaters(){
    return this.requset({
      url:"in_theaters"
    })
  }
  getTop250(){
    return this.requset({
      url:"top250"
    })
  }
  getComingSoon(){
    return this.requset({
      url:"coming_soon"
    })
  }
}
export {MovieModel};

pages/index/index.js

const app = getApp();
import {MovieModel} from "../../model/movie";
const movieModel = new MovieModel();
Page({
 onLoad(){
  // movieModel.getInTheaters().then(res=>{
  //  console.log(res)
  // })
  const inTheaters = movieModel.getInTheaters()
  const top250 = movieModel.getTop250();
  const comingSoon = movieModel.getComingSoon();
  Promise.all([inTheaters,top250,comingSoon]).then(res=>{
   let[inTheaters,top250,comingSoon] = res;
   console.log(inTheaters)
  })
 }
})

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