微信小程序前端promise封装代码实例

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://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)
  })
 }
})

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。