微信小程序全局变量数组如何取到值

代码如下，accountList有值但是全局变量app.globalData.accountList为空，请问如何解决？十分感谢！

 onShow:function(){
      console.log("初始值",this.data.accountList)
      for (var i = 0; i <this.data.accountList.length; i++){
        var string = 'app.globalData.accountList[' + i + ']'
        this.setData({
        [string]: {
          name: this.data.accountList[i].name, 
          balance: this.data.accountList[i].balance,
          type: this.data.accountList[i].type,
          icon: this.data.accountList[i].icon}
       })
       console.log("值1",app.globalData.accountList)
      }

    }

https://blog.csdn.net/weixin_42418774/article/details/99679965