微信小程序使用promise封装异步请求

wx.showModal({
  title: ‘提示‘,
  content: ‘这是一个模态弹窗‘,
  success: function(res) {
    if (res.confirm) {
      console.log(‘用户点击确定‘)
    } else if (res.cancel) {
      console.log(‘用户点击取消‘)
    }
  }
})

wx.showModal({
  title: ‘提示‘,
  content: ‘这是一个模态弹窗‘,
  success: function(res) {
    if (res.confirm) {
      wx.showModal({
          title: ‘提示‘,
          content: ‘这是一个模态弹窗‘,
          success: function(res) {
          if (res.confirm) {
              console.log(‘用户点击确定‘)
         } 
      }
    })
    }
  }
})                  

//封装异步api
const wxPromisify = fn => {
  return function (obj = {}) {
    return new Promise((resolve, reject) => {
      obj.success = function (res) {
        resolve(res)
      }

      obj.fail = function (res) {
        reject(res)
      }

      fn(obj)
    })
  }
}

const getLocationPromisified = wxPromisify(wx.getLocation);//获取经纬度
const showModalPromisified = wxPromisify(wx.showModal);//弹窗

// 封装post请求
const post = (url,data) => {
  var promise = new Promise((resolve, reject) => {
    //网络请求
    wx.request({
      url: url,
      data: data,
      method: ‘POST‘,
      header: { 
        ‘content-type‘: ‘application/x-www-form-urlencoded‘,
        ‘token‘:wx.getStorageSync(‘token‘)
      },
      success: function (res) {//服务器返回数据
        if (res.statusCode == 200) {
          resolve(res);
        } else {//返回错误提示信息
          reject(res.data);
        }
      },
      error: function (e) {
        reject(‘网络出错‘);
      }
    })
  });
  return promise;
}
// 封装get请求
const get = (url, data) => {
  var promise = new Promise((resolve, reject) => {
    //网络请求
    wx.request({
      url: url,
      data: data,
      header: {
        ‘content-type‘: ‘application/json‘,
        ‘token‘: wx.getStorageSync(‘token‘)
      },
      success: function (res) {//服务器返回数据
        if (res.statusCode == 200) {
          resolve(res);
        } else {//返回错误提示信息
          reject(res.data);
        }
      },
      error: function (e) {
        reject(‘网络出错‘);
      }
    })
  });
  return promise;
}

module.exports = {
  post,
  get,
  getLocationPromisified,
  showModalPromisified
}

//index.js
//获取应用实例
const app = getApp()
const util = require(‘../../utils/util‘)
Page({
  data: {
    
  },
  onLoad(){
    util.showModalPromisified({
      title: ‘提示‘,
      content: ‘这是一个模态弹窗‘,
    }).then(function(res){
      console.log(res);
      if (res.confirm){
        return util.getLocationPromisified({
          type: ‘wgs84‘
        })
      }
    }).then(function(res){
      console.log(res)
      return util.get(‘https://easy-mock.com/mock/59b6617ae0dc663341a5dea4/itaem/123‘,{})
    }).then(function(res){
      console.log(res)
    }).catch(function(res){
      console.log(res)    
    })
  }
})