微信小程序开发(二)-----项目的创建

 1 //app.js
 2 App({
 3   onLaunch: function () {
 4 
 5     //程序加载的时候添加
 6     console.log(‘hello world‘)
 7 
 8     //调用API从本地缓存中获取数据
 9     var logs = wx.getStorageSync(‘logs‘) || []
10     logs.unshift(Date.now())
11     wx.setStorageSync(‘logs‘, logs)
12   },
13   getUserInfo:function(cb){
14     var that = this
15     if(this.globalData.userInfo){
16       typeof cb == "function" && cb(this.globalData.userInfo)
17     }else{
18       //调用登录接口
19       wx.login({
20         success: function () {
21           wx.getUserInfo({
22             success: function (res) {
23               that.globalData.userInfo = res.userInfo
24               typeof cb == "function" && cb(that.globalData.userInfo)
25             }
26           })
27         }
28       })
29     }
30   },
31   globalData:{
32     userInfo:null
33   }
34 })