_this is not defined;at api operateWXData success callback function

ReferenceError: _this is not defined

at success (app-service.js:10233:414124)

at Object.o.<computed> (WASubContext.js:2:1195803)

at Function.<anonymous> (WASubContext.js:2:447494)

at y (WASubContext.js:2:399405)

at v (WASubContext.js:2:399643)

at at (WASubContext.js:2:401197)