小程序

WeApp

从入门到放弃

What The Fuck

分享主题

Subjects

文档入门 (Doc)
原理入门 (How)
学习路线 (Route)

文档入门

Doc

熟悉项目结构 (Project Structure)
熟悉生命周期 (Life Cycle)
了解组件与API (Component & API)

项目结构

Project Structure

app.js

App({
  onLaunch: function() { 
    // Do something initial when launch.
  },
  onShow: function() {
      // Do something when show.
  },
  onHide: function() {
      // Do something when hide.
  },
  onError: function(msg) {
    console.log(msg)
  },
  globalData: 'I am global data'
})

App()

//app.js
App({
  onLaunch: function () {
    //调用API从本地缓存中获取数据
    var logs = wx.getStorageSync('logs') || []
    logs.unshift(Date.now())
    wx.setStorageSync('logs', logs)
  },
  getUserInfo:function(cb){
    var that = this
    if(this.globalData.userInfo){
      typeof cb == "function" && cb(this.globalData.userInfo)
    }else{
      //调用登录接口
      wx.login({
        success: function () {
          wx.getUserInfo({
            success: function (res) {
              that.globalData.userInfo = res.userInfo
              typeof cb == "function" && cb(that.globalData.userInfo)
            }
          })
        }
      })
    }
  },
  globalData:{
    userInfo:null
  }
})

app.json

{
  "pages": [
    "pages/index/index",
    "pages/logs/index"
  ],
  "window": {
    "navigationBarTitleText": "Demo"
  },
  "tabBar": {
    "list": [{
      "pagePath": "pages/index/index",
      "text": "首页"
    }, {
      "pagePath": "pages/logs/logs",
      "text": "日志"
    }]
  },
  "networkTimeout": {
    "request": 10000,
    "downloadFile": 10000
  },
  "debug": true
}

index.js

Page({
  data: {
    text: "This is page data."
  },
  onLoad: function(options) {
    // Do some initialize when page load.
  },
  onReady: function() {
    // Do something when page ready.
  },
  onShow: function() {
    // Do something when page show.
  },
  onHide: function() {
    // Do something when page hide.
  },
  onUnload: function() {
    // Do something when page close.
  },
  onPullDownRefresh: function() {
    // Do something when pull down.
  },
  onReachBottom: function() {
    // Do something when page reach bottom.
  },
  onShareAppMessage: function () {
   // return custom share data when user share.
  },
  // Event handler.
  viewTap: function() {
    this.setData({
      text: 'Set some data for updating view.'
    })
  },
  customData: {
    hi: 'MINA'
  }
})

//index.js
//获取应用实例
var app = getApp()
Page({
  data: {
    motto: 'Hello World',
    userInfo: {}
  },
  //事件处理函数
  bindViewTap: function() {
    wx.navigateTo({
      url: '../logs/logs'
    })
  },
  onLoad: function () {
    console.log('onLoad')
    var that = this
    //调用应用实例的方法获取全局数据
    app.getUserInfo(function(userInfo){
      //更新数据
      that.setData({
        userInfo:userInfo
      })
    })
  }
})

page.json

{
  "navigationBarBackgroundColor": "#ffffff",
  "navigationBarTextStyle": "black",
  "navigationBarTitleText": "微信接口功能演示",
  "backgroundColor": "#eeeeee",
  "backgroundTextStyle": "light"
}

WXML

<!--index.wxml-->
<view class="container">
  <view  bindtap="bindViewTap" class="userinfo">
    <image class="userinfo-avatar" src="{{userInfo.avatarUrl}}" background-size="cover"></image>
    <text class="userinfo-nickname">{{userInfo.nickName}}</text>
  </view>
  <view class="usermotto">
    <text class="user-motto">{{motto}}</text>
  </view>
</view>

WXSS

/**index.wxss**/
.userinfo {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.userinfo-avatar {
  width: 128rpx;
  height: 128rpx;
  margin: 20rpx;
  border-radius: 50%;
}

.userinfo-nickname {
  color: #aaa;
}

.usermotto {
  margin-top: 200px;
}