undefined is not an object (evaluating 'o.data.city.length');at api request success callback function success@https://pages/chongdian/chongdian.js:188:39success@https://libs/amap-wx.js:1:1538https://lib/WAService.js:1:849867https://lib/WAService.js:1:101753C@https://lib/WAService.js:1:255016https://lib/WAService.js:1:521392emit@https://lib/WAService.js:1:273137hc@https://lib/WAService.js:1:522004https://lib/WAService.js:1:523223https://lib/WAService.js:1:283581m@https://lib/WAService.js:1:1728

请问想这种错误的位置是在哪，188 39是什么意思啊