有关setdata问题？

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有关setdata问题？Questions about setdata?

console.log("befor:" + that.shareImg);that.setData({ shareImg: res.tempFilePath });console.log("after:" + that.shareImg);console.log(res.tempFilePath);输出如下：befor:undefinedafter:undefinedhttp://tmp/wxb4f060XXXXXX7.pngundefined

console.log ("befor:" +  that.shareImg ); that.setData ({ shareImg:  res.tempFilePath  }); console.log ("after:" +  that.shareImg ); console.log ( res.tempFilePath ）The output is as follows: befor:undefinedafter :unde finedhttp://tmp/wxb4f060XXXXXX7.pngundefined The shareimg I have assigned initial value, but the same is undefined? I don't know how to use global variables in JS. I've been bothering for a week. Please help me

回答：

that.data.shareImg

console.log("before:" + that.data.shareImg);console.log("after:" + that.data.shareImg);