App.js

onRequest:function(){

    var that = this

    wx.requst({

        url:"xxxx",

        success:function(res){

              that.globalData.data = res.data

        }

    })

}

index.js

const app  = getApp()

Page({

    data: {},

    onShow: function () {

        app.onRequest()

        console.log(app.globalData.data)   // 返回的是underfind , 请问是为什么？

    },

})