我的代碼如下：App({     data: {         posts: {}     },     onLaunch(event) {         // console.log('onLaunch');         var that = this;         swan.request({             url: 'http://www.sfatpaper.com/content.json',             success: function (res) {                 console.log(res.data);                 that.setData({                     posts: res.data.posts                 });             },             fail: function (err) {                 console.log('錯(cuò)誤碼：' + err.errCode);                 console.log('錯(cuò)誤信息：' + err.errMsg);             }         })           } });通過(guò)ajax，目前可以順利讀取接口數(shù)據(jù)，其中posts的數(shù)據(jù)有兩項(xiàng)posts:Array(2)    0:Object     1:Object我想通過(guò)that.setData將數(shù)據(jù)傳給外層的data對(duì)象，以便其他頁(yè)面調(diào)用但是報(bào)錯(cuò)顯示：Uncaught (in promise) TypeError: that.setData is not a function還望指正，問(wèn)題出在那里呢？謝謝！