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thirdScriptError:Cannot read property ‘songlist’ of undefined;at api request success callback function
TypeError: Cannot read property ‘songlist’ of undefined.

这是我练习的list.js源代码：

// pages/list/list.js var config = require('../../config.js');   var formatSeconds = function(value) {   var time = parseFloat(value);   var m = Math.floor(time / 60);   var s = time - m * 60;     return [m, s].map(formatNumber).join(':');     function FormatNumber(n) {     n = n.toString()     return n[1] ? n : '0' + n   } }   Page({   data: {     board: '',     songlist: [],     loading: false,   },   onLoad: function(options) {     var self = this;     var topid = options.type;       this.setData({       loading: true     })       wx: wx.request({       url: config.config.hotUrl,       data: {         topid: topid       },       success: function(e) {         //var songlist=songlist;         //var self = this;         if (e.statusCode == 200) {           var songlist = e.data.showapi_res_body_pagebean.songlist;             for (var i = 0; i < songlist.length; i++) {             songlist[i].seconds = formatSeconds(songlist[i].seconds);           }           self.setData({  //估计是这里出bug             board: e.data.showapi_res_body_pagebean.songlist[0].albumpic_big,             songlist: songlist,/** 定位？**/             loading: false           });             wx.setStorageSync('songlist', songlist);         }       }     });   }   })