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微信小程序的日历选择，主要针对酒店选择时间段的日历，带有公历的节日。

主要函数： 
通过选择入住与离店时间，记录对应的时间段，判断选择的开始时间和结束时间，通过改变背影颜色连成对应时间段。

selectDataMarkLine: function () { let dateList = this.data.dateList; let { checkInDate, checkOutDate } = wx.getStorageSync("ROOM_SOURCE_DATE"); let curreInid = checkInDate.substr(0, 4) + "-" + (checkInDate.substr(5, 2) < 10 ? checkInDate.substr(6, 1) : checkInDate.substr(5, 2));//选择入住的id let curreOutid = checkOutDate.substr(0, 4) + "-" + (checkOutDate.substr(5, 2) < 10 ? checkOutDate.substr(6, 1) : checkOutDate.substr(5, 2));//选择离店的id let dayIn = checkInDate.substr(8, 2) >= 10 ? checkInDate.substr(8, 2) : checkInDate.substr(9, 1);//选择入住的天id let dayOut = checkOutDate.substr(8, 2) >= 10 ? checkOutDate.substr(8, 2) : checkOutDate.substr(9, 1);//选择离店的天id let monthIn = checkInDate.substr(5, 2) >= 10 ? checkInDate.substr(5, 2) : checkInDate.substr(6, 1);//选择入店的月id let monthOut = checkOutDate.substr(5, 2) >= 10 ? checkOutDate.substr(5, 2) : checkOutDate.substr(6, 1);//选择离店的月id if (curreInid == curreOutid) {//入住与离店是当月的情况 for (let i = 0; i < dateList.length; i++) { if (dateList[i].id == curreInid) { let days = dateList[i].days; for (let k = 0; k < days.length; k++) { if (days[k].day >= dayIn && days[k].day <= dayOut) { days[k].class = days[k].class + ' bgitem'; } if (days[k].day == dayIn) { days[k].class = days[k].class + ' active'; days[k].inday = true; } if (days[k].day == dayOut) { days[k].class = days[k].class + ' active'; days[k].outday = true; } } } } } else {//跨月 for (let j = 0; j < dateList.length; j++) { if (dateList[j].month == monthIn) {//入住的开始月份 let days = dateList[j].days; for (let k = 0; k < days.length; k++) { if (days[k].day >= dayIn) { days[k].class = days[k].class + ' bgitem'; } if (days[k].day == dayIn) { days[k].class = days[k].class + ' active'; days[k].inday = true; } } } else {//入住跨月月份 if (dateList[j].month < monthOut) {//离店中间的月份 let days = dateList[j].days; for (let k = 0; k < days.length; k++) { days[k].class = days[k].class + ' bgitem'; } } else if (dateList[j].month == monthOut) {//离店最后的月份 let days = dateList[j].days; for (let k = 0; k < days.length; k++) { if (days[k].day <= dayOut) { days[k].class = days[k].class + ' bgitem'; } if (days[k].day == dayOut) { days[k].class = days[k].class + ' active'; days[k].outday = true; } } } } } } this.setData({ dateList: dateList }) },

效果图：