// 把當前選中的起點儲存到快取中
    var loc = e.currentTarget.dataset;
    // 拿到選中的列表中元素
    var locArr = {}
    for (var i in loc) {
      locArr[i] = (loc[i]);
    }
    console.log(locArr)

    // 把一條歷史記錄轉化成物件
    var locArrO = {}
    for (var key in locArr) {
      locArrO[key] = locArr[key];
    }
    
    // 把陣列新增到快取大陣列中
    if (wx.getStorageSync('startLocation')) {
      var locArrs = wx.getStorageSync('startLocation')
    } else {
      var locArrs = []
    }
    locArrs.push(locArrO)
    wx.setStorageSync('startLocation', locArrs)