详解微信小程序 同步异步解决办法

import Tools from 'Tools'import es6 from '../assets/plugins/es6-promise'class Service { constructor() {  this.__init() } /**  * __init  */ __init() {  this.tools = new Tools  this.__initDefaults()  this.__initMethods() } /**  * __initDefaults  */ __initDefaults() {  // 缓存非异步方法  this.noPromiseMethods = [   'stopRecord',   'pauseVoice',   'stopVoice',   'pauseBackgroundAudio',   'stopBackgroundAudio',   'showNavigationBarLoading',   'hideNavigationBarLoading',   'createAnimation',   'createContext',   'hideKeyboard',   'stopPullDownRefresh',  ]  // 缓存wx接口方法名  this.instanceSource = {   method: Object.keys(wx)  } } /**  * 遍历wx方法对象，判断是否为异步方法，是则构造promise  */ __initMethods() {  for (let key in this.instanceSource) {   this.instanceSource[key].forEach((method, index) => {    this[method] = (...args) => {     // 判断是否为非异步方法或以 wx.on 开头，或以 Sync 结尾的方法     if (this.noPromiseMethods.indexOf(method) !== -1 || method.substr(0, 2) === 'on' || //w+Sync$/.test(method)) {      return wx[method](...args)     }     return this.__defaultRequest(method, ...args)    }   })  }    /**     * 保留当前页面，跳转到应用内的某个页面     * @param {String} url 路径     * @param {Object} params 参数     */  this.navigateTo = (url, params) => {   const $$url = this.tools.buildUrl(url, params)   return new es6.Promise((resolve, reject) => {    wx.navigateTo({     url: $$url,     success: res => resolve(res),     fail: res => reject(res),    })   })  }  /**  * 关闭当前页面，跳转到应用内的某个页面  * @param {String} url 路径  * @param {Object} params 参数  */  this.redirectTo = (url, params) => {   const $$url = this.tools.buildUrl(url, params)   return new es6.Promise((resolve, reject) => {    wx.redirectTo({     url: $$url,     success: res => resolve(res),     fail: res => reject(res),    })   })  } } /**  * 以wx下API作为底层方法  * @param {String} method 方法名  * @param {Object} obj  接收参数  */ __defaultRequest(method = '', obj = {}) {  return new es6.Promise((resolve, reject) => {   obj.success = (res) => resolve(res)   obj.fail = (res) => reject(res)   wx[method](obj)  }) }}export default Service