微信小程序实现缓存根据不同的id来进行设置和读取缓存

onLoad: function (options) {   var that = this;   var activityId = options.activityId;   //报名表人数统计   wx.request({    url: domain + '/activityjoin/selectJoinCount',    data: { activityId: activityId },    method: 'GET',    success: function (res) {        var jonNums = res.data;     var newNumber = jonNums.count - wx.getStorageSync('jonNumsed' + activityId) //获取缓存       wx.setStorageSync('jonNumsed' + activityId, jonNums.count);//设置缓存      if (jonNums.count) {      activityId         }      jonNums.joinCount = jonNums.count;      that.setData({ newNumber: newNumber, jonNums: jonNums })    }   })    },