微信小程序：数据存储、传值、取值详解

// 方法一：navigator标签传值
  <navigator url="/page/index/index?id=110" >传值</navigator>
  <navigator url="/page/index/index?id=110&username=jane&password=123456" >传值</navigator>

  // 方法二： wx.navigator标签传值单值、多值传递
  wx.navigateTo({
   url: '/page/index/index?id=' + id
  })

  wx.navigateTo({
   url: '/page/index/index?id=' + id +'&username='+ username+'&password='+ password
  })

 /**
 * 生命周期函数--监听页面加载
 */
 onLoad: function (options) {
  var id = options.id;
  this.setData({
   id:id,
   username:username,
   password:password,
  })
 },

 var pages = getCurrentPages() // 获取栈中全部界面的, 然后把数据写入相应界面
  var currentPage = pages[pages.length - 1] //当前界面
  var prePage = pages[pages.length - 2] //上一个界面
  var that = this
  prePage.setData({
   id: that.data.id,
  })

  /**
  * 生命周期函数--监听页面显示
  */
  onShow: function () {
   //获取数据 
   this.gainData() 
   // 打印你的传值
   console.log("res==", this.data.res)
  },

wx.setStorageSync('user_info', dic);

 var user_info = wx.getStorageSync("user_info")
   this.setData({
    username: user_info.username
   });

 wx.removeStorageSync("user_info")

//用户数据
    appData: {
      user_info:null,
    }

var app = getApp();
    app.appData.user_info = {"username"："jane"};

 var app = getApp();
    var user_info = app.appData.user_info;
    this.setData({
      username: user_info.username
    });