// index.js

Page({

  data: {

    time: (new Date()).toString(),

    addr: "北京"

  },

  but: function(){

    console.log("你好");

    this.setData(

      {},

      function(){

        wx.navigateTo({

          "url": "/qrcode/home/home"

        })

      }

    )

  }

})

// index.wxml

<view>Hello World!</view>

<view>{{addr}}时间：{{time}}</view>

<button bindtap="but">点击按钮</button>