本文实例为大家分享了微信小程序自定义日历效果的具体代码，供大家参考，具体内容如下

JS代码：

var Moment = require("../../utils/moment.js");var DATE_YEAR = new Date().getFullYear();var DATE_MONTH = new Date().getMonth() + 1;var DATE_DAY = new Date().getDate();Page({ data: { year: '', month: '', day: '', days: {}, systemInfo: {}, weekStr: ['日', '一', '二', '三', '四', '五', '六'], checkDate:[] }, onLoad: function(options) { var _this = this; let now = new Date(); let year = now.getFullYear(); let month = now.getMonth() + 1; // 页面初始化 options为页面跳转所带来的参数 this.createDateListData(); this.setData({ year: year, month: month }) wx.getSystemInfo({ success: function(res) { _this.setData({ systemInfo: res, }); } }) }, onReady: function() { // 页面渲染完成 }, onShow: function() { }, /**创建日历数据 */ createDateListData: function(setYear, setMonth) { //全部时间的月份都是按0~11基准，显示月份才+1 let dateArr = []; //需要遍历的日历数组数据 let arrLen = 0; //dateArr的数组长度 let now = setYear ? new Date(setYear, setMonth) : new Date(); let year = setYear || now.getFullYear(); let nextYear = 0; let month = setMonth || now.getMonth(); //没有+1方便后面计算当月总天数 let nextMonth = (month + 1) > 11 ? 1 : (month + 1); console.log("当前选中月nextMonth：" + nextMonth); //目标月1号对应的星期 let startWeek = this.getWeek(year, nextMonth, 1); //new Date(year + ',' + (month + 1) + ',' + 1).getDay(); console.log("目标月1号对应的星期startWeek:" + startWeek); //获取目标月有多少天 let dayNums = this.getTotalDayByMonth(year, nextMonth); //new Date(year, nextMonth, 0).getDate(); console.log("获取目标月有多少天dayNums:" + dayNums); let obj = {}; let num = 0; if (month + 1 > 11) { nextYear = year + 1; dayNums = new Date(nextYear, nextMonth, 0).getDate(); } for (var j = -startWeek + 1; j <= dayNums; j++) { var tempWeek = -1; if (j > 0) { tempWeek = this.getWeek(year, nextMonth, j); //console.log(year + "年" + month + "月" + j + "日" + "星期" + tempWeek); } var clazz = ''; if (tempWeek == 0 || tempWeek == 6) clazz = 'week' if (j < DATE_DAY && year == DATE_YEAR && nextMonth == DATE_MONTH) //当天之前的日期不可用 clazz = 'unavailable ' + clazz; else clazz = '' + clazz /**如果当前日期已经选中，则变色 */ var date = year + "-" + nextMonth + "-" + j; var index = this.checkItemExist(this.data.checkDate, date); if (index != -1) { clazz = clazz + ' active'; } dateArr.push({ day: j, class: clazz, amount:'￥99.8' }) } this.setData({ days: dateArr }) }, /** * 上个月 */ lastMonthEvent:function(){ //全部时间的月份都是按0~11基准，显示月份才+1 let year = this.data.month - 2 < 0 ? this.data.year - 1 : this.data.year; let month = this.data.month - 2 < 0 ? 11 : this.data.month - 2; this.setData({ year: year, month: (month + 1) }) this.createDateListData(year, month); }, /** * 下个月 */ nextMonthEvent:function(){ //全部时间的月份都是按0~11基准，显示月份才+1 let year = this.data.month > 11 ? this.data.year + 1 : this.data.year; let month = this.data.month > 11 ? 0 : this.data.month; this.setData({ year: year, month: (month + 1) }) this.createDateListData(year, month); }, /* * 获取月的总天数 */ getTotalDayByMonth: function(year, month) { month = parseInt(month, 10); var d = new Date(year, month, 0); return d.getDate(); }, /* * 获取月的第一天是星期几 */ getWeek: function(year, month, day) { var d = new Date(year, month - 1, day); return d.getDay(); }, /** * 点击日期事件 */ onPressDateEvent: function(e) { var { year, month, day, amount } = e.currentTarget.dataset; console.log("当前点击的日期：" + year + "-" + month + "-" + day); //当前选择的日期为同一个月并小于今天，或者点击了空白处（即day<0），不执行 if ((day < DATE_DAY && month == DATE_MONTH) || day <= 0) return; this.renderPressStyle(year, month, day, amount); }, renderPressStyle: function (year, month, day, amount) { var days = this.data.days; //渲染点击样式 for (var j = 0; j < days.length; j++) { var tempDay = days[j].day; if (tempDay == day) { var date = year + "-" + month + "-" + day; var obj = { day: date, amount: amount }; var checkDateJson = this.data.checkDate; var index = this.checkItemExist(checkDateJson, date); if (index == -1) { checkDateJson.push(obj); days[j].class = days[j].class + ' active'; } else { checkDateJson.splice(index, 1); days[j].class = days[j].class.replace('active',' '); } this.setData({ checkDate: checkDateJson }) console.log(JSON.stringify(this.data.checkDate)); break; } } this.setData({ days: days }); }, /**检查数组中是否存在该元素 */ checkItemExist: function (arr,value){ for (var i = 0; i < arr.length; i++) { if (value === arr[i].day) { return i; } } return -1; }})

WXML代码

<view class="date-year-month"><image bindtap='lastMonthEvent' src='../../image/left.png'></image>{{year}}年{{month}}月<image src='../../image/right.png' bindtap='nextMonthEvent' ></image></view> <view ></view><view><view style="background:#F5F5F5;font-size: 30rpx; "> <view class="layout-flex row" style="background-color: #F5F5F5;"> <text class="date-week" style="width:{{systemInfo.windowWidth/7-10}}px;height:20px" wx:for="{{weekStr}}" wx:key="{{index}}"> <text wx:if="{{item !=='日' && item !=='六'}}">{{item}}</text> <text wx:if="{{item ==='日' || item ==='六'}}" class="week">{{item}}</text> </text> </view></view> <view class="layout-flex row" style="flex-wrap: wrap;margin-top:30rpx;"> <view class="date-day {{item.day<=0?'bgwhite':item.class}}" style="width:{{systemInfo.windowWidth/7-10}}px;height:{{systemInfo.windowWidth/7}}px;" data-year="{{year}}" data-month="{{month}}" data-day="{{item.day}}" data-amount="{{item.amount}}"bindtap="onPressDateEvent" wx:for="{{days}}" wx:key="{{index}}"> <view class='item-days'> <text>{{item.day>0?(item.daytext?item.daytext:item.day):''}}</text> <text class='amount' wx:if='{{item.day>0}}'>{{item.amount}}</text> </view> </view> </view></view>

WXSS代码

.date-day { display: flex; padding: 5px; text-align: center; justify-content: center; align-items: center; flex-direction: column;} .date-day.bgitem { background-color: #d8ecf9;} .date-day.active { background: #099fde; color: #fff;} .date-day.unavailable { color: #aaa;} .date-week { display: flex; justify-content: center; align-content: center; margin: 5px;} .week { color: #099fde;} .row { display: flex; flex-direction: row;} .item-days { display: flex; flex-direction: column; justify-content: center; align-items: center; font-size: 35rpx;}.amount{ font-size: 30rpx;}.bgwhite { background-color: #fff;} .date-year-month { text-align: center; font-size: 35rpx; height: 100rpx; line-height: 100rpx; display: flex; justify-content: center; align-items: center;}.date-year-month image{ height: 50rpx; width: 50rpx; margin: 0 30rpx;}

moment.js

var Moment = function (date) { var date; if (date) this.date = new Date(date); else this.date = new Date(); return this;};/** * 对Date的扩展，将 Date 转化为指定格式的String * 月(M)、日(d)、12小时(h)、24小时(H)、分(m)、秒(s)、周(E)、季度(q) 可以用 1-2 个占位符 * 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字) * eg: * "yyyy-MM-dd hh:mm:ss.S" ==> 2006-07-02 08:09:04.423 * "yyyy-M-d h:m:s.S" ==> 2006-7-2 8:9:4.18 * "yyyy-MM-dd E HH:mm:ss" ==> 2009-03-10 二 20:09:04 * "yyyy-MM-dd EE hh:mm:ss" ==> 2009-03-10 周二 08:09:04 * "yyyy-MM-dd EEE hh:mm:ss" ==> 2009-03-10 星期二 08:09:04 */Moment.prototype.format = function (format) { var date = this.date; if (typeof date === 'string') date = this.parse(date); var o = { "M+": date.getMonth() + 1, //月份 "(d+|D+)": date.getDate(), //日 "(h+|H+)": date.getHours(), //小时 "m+": date.getMinutes(), //分 "s+": date.getSeconds(), //秒 "q+": Math.floor((date.getMonth() + 3) / 3), //季度 "S": date.getMilliseconds() //毫秒 }; var week = { "0": "/u65e5", "1": "/u4e00", "2": "/u4e8c", "3": "/u4e09", "4": "/u56db", "5": "/u4e94", "6": "/u516d" }; if (/(y+|Y+)/.test(format)) format = format.replace(RegExp.$1, (date.getFullYear() + "").substr(4 - RegExp.$1.length)); if (/(E+)/.test(format)) format = format.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "/u661f/u671f" : "/u5468") : "") + week[date.getDay() + ""]); for (var k in o) { if (new RegExp("(" + k + ")").test(format)) format = format.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length))); } return format;} Moment.prototype.parse = function () { return this.date;}/** * 计算两个日期差差 * return day */Moment.prototype.differ = function (date) { var time1 = this.date.getTime(); if (typeof date === 'string') date = new Date(date); var time1 = this.date.getTime(); var time2 = date.getTime(); var differ = Math.ceil((time1 - time2) / (1000 * 3600 * 24));//除不尽时,向上取整 return differ;} Moment.prototype.add = function (num, optionType) { var date = this.date; if ('day' === optionType) { date.setDate(date.getDate() + num); } if ('month' === optionType) { date.setMonth(date.getMonth() + num); } if ('year' === optionType) { date.setFullYear(date.getFullYear() + num); } this.date = date; return this;} Moment.prototype.before = function (date) { return this.date.getTime() < new Date(date).getTime()}Moment.prototype.after = function (date) { return this.date.getTime() > date.getTime()} module.exports = function (date) { return new Moment(date);}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。