331 lines
13 KiB
JavaScript
331 lines
13 KiB
JavaScript
(function () {
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/**
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* 构造函数
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* @param {*} ParentElement 父节点的选择器名称
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* @param {*} Configuration 插件的自定义设置项
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*/
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function Swiper(ParentElement, Configuration) {
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// 默认参数
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// slideChangeTransitionStart【完成】
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// slideTo【完成】
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this.defaultConf = {
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reverse: false,
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timer: '', // 保存自动播放的定时器
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ParentElement: '.swiper-container',
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wrapper: '.swiper-wrapper',
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slide: '.swiper-slide',
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config: {
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loop: false, // 是否开启循环播放【完成】
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time: 1, // 自动播放的间隔事件【完成】
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speed: 300, // 切换轮播图时候用的时间【完成】
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grabCursor: false, // 鼠标放到轮播图上是否显示为 小手【完成】
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initialSlide: 0, // 默认显示第一个【完成】
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auto: false, // 是否开启自动播放【完成】
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},
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// 小圆点的父标签选择器名称
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pagination: {
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el: '.swiper-pagination',
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},
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navigation: {
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nextEl: '.swiper-button-next', // 下一页
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prevEl: '.swiper-button-prev', // 上一页
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},
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}
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this.defaultConf.ParentElement = ParentElement || this.defaultConf.ParentElement;
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this.defaultConf.config.loop = Configuration.loop || this.defaultConf.config.loop;
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this.defaultConf.config.time = Configuration.time || this.defaultConf.config.time;
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this.defaultConf.config.speed = Configuration.speed || this.defaultConf.config.speed;
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this.defaultConf.config.grabCursor = Configuration.grabCursor || this.defaultConf.config.grabCursor;
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this.defaultConf.config.initialSlide = Configuration.initialSlide || this.defaultConf.config.initialSlide;
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this.defaultConf.config.auto = Configuration.auto || this.defaultConf.config.auto;
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this.defaultConf.wrapper = Configuration.wrapper || this.defaultConf.wrapper;
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this.defaultConf.slide = Configuration.slide || this.defaultConf.slide;
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this.slideArr = this._(`${this.defaultConf.wrapper} ${this.defaultConf.slide}`);
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// 最外层 swiper-container 宽度
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this.f = this.$(this.defaultConf.ParentElement).offsetWidth;
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// 判断小圆点
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if (Configuration.hasOwnProperty("pagination")) {
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this.defaultConf.pagination.el = Configuration.pagination.el;
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this.RenderDot()
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}
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// 判断使用自定义前进后退按钮
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if (Configuration.hasOwnProperty("navigation")) {
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this.RenderNavigation()
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//判断下一页按钮的名称是否自定义
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if (Configuration.navigation.hasOwnProperty("nextEl")) {
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this.defaultConf.navigation.nextEl = Configuration.navigation.nextEl;
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}
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//判断上一页按钮的名称是否自定义
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if (Configuration.navigation.hasOwnProperty("prevEl")) {
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this.defaultConf.navigation.prevEl = Configuration.navigation.prevEl;
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}
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}
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this.UserConfig = Configuration
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this.init()
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}
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// 类的方法
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Swiper.prototype = {
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init: function () {
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this.SetWrapperWidth();
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this.defaultConf.config.auto ? this.AutoPlay() : '';
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this.initSwiperSlide()
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},
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// 设置swiper-slide父类的宽度
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SetWrapperWidth: function () {
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// 计算swiper-slide的宽度
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this.slideArr.forEach(v => v.style.width = `${this.f}px`)
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this.$(this.defaultConf.wrapper).style = `
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width: ${this.f * this.slideArr.length}px;
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left: -${this.f * this.defaultConf.config.initialSlide}px;
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transition: all ease ${this.defaultConf.config.speed / 1000}s;
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cursor: ${this.defaultConf.config.grabCursor ? 'pointer' : ''} ;
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`
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},
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/**
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* 注册移动端滑动
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*/
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initSwiperSlide: function () {
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var fa = this.$(this.defaultConf.ParentElement),
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startX = 0,
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startY = 0;
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fa.addEventListener('touchstart', function (e) {
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e.stopPropagation()
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startX = e.targetTouches[0].pageX
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startY = e.targetTouches[0].pageY
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})
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var getDirection = function (startx, starty, endx, endy) {
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// 获得角度
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var getAngle = function(angx, angy) {
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return Math.atan2(angy, angx) * 180 / Math.PI;
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};
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var angx = endx - startx;
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var angy = endy - starty;
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var result = 0;
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// 如果滑动距离太短
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if (Math.abs(angx) < 2 && Math.abs(angy) < 2) {
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return result;
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}
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var angle = getAngle(angx, angy);
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if (angle >= -135 && angle <= -45) {
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result = 1;
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} else if (angle > 45 && angle < 135) {
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result = 2;
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} else if ((angle >= 135 && angle <= 180) || (angle >= -180 && angle < -135)) {
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result = 3;
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} else if (angle >= -45 && angle <= 45) {
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result = 4;
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}
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return result;
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}
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fa.addEventListener('touchmove', (e) => {
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e.stopPropagation()
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var endX = e.changedTouches[0].pageX;
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var endY = e.changedTouches[0].pageY;
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var direction = getDirection(startX, startY, endX, endY);
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if (direction == 3 || direction == 4) {
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var x = parseInt(endX - startX) - 40
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this.$(this.defaultConf.wrapper).style.webkitTransform = `translate3d(${x}px,0px,0px)`;
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}
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});
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fa.addEventListener('touchend', (e) => {
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e.stopPropagation()
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var endX = e.changedTouches[0].pageX;
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var endY = e.changedTouches[0].pageY;
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var direction = getDirection(startX, startY, endX, endY);
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switch (direction) {
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case 0:
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console.log("未滑动！");
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break;
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case 1:
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console.log("向上！")
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break;
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case 2:
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console.log("向下！")
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break;
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case 3:
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this.$(this.defaultConf.wrapper).style.webkitTransform = `translate3d(0px,0px,0px)`;
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this.animation(-this.f)
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this.CallMethods()
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this.UserConfig.pagination && this.ChangeDotActive()
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console.log("向左！")
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break;
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case 4:
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this.$(this.defaultConf.wrapper).style.webkitTransform = `translate3d(0px,0px,0px)`;
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this.animation(this.f)
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this.CallMethods()
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this.UserConfig.pagination && this.ChangeDotActive()
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console.log("向右滑动");
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break;
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default:
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}
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})
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},
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CallMethods() {
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if (this.UserConfig.hasOwnProperty("on")) {
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var TotalLeft = Math.abs(parseInt(this.$(this.defaultConf.wrapper).style.left));
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index = TotalLeft / this.f;
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// 实现调用用户传入的方法，返回下标给用户
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this.UserConfig.on && this.UserConfig.on.slideChangeTransitionStart(index)
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}
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},
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// 生成小圆点
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RenderDot: function () {
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this.slideArr.forEach((v, i) => {
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this.$(this.defaultConf.pagination.el).innerHTML +=
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`
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<div class="swiper-dot ${i == 0 ? 'swiper-active' : ''}"></div>
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`
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});
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var Dot = this._(`${this.defaultConf.pagination.el} .swiper-dot`);
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Dot.forEach((v, i) => {
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v.onclick = () => {
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this.UserConfig.pagination && this.ChangeDotActive(i)
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this.$(this.defaultConf.wrapper).style.left = `-${i * this.f}px`;
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}
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})
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},
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// 渲染左右前进后退按钮
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RenderNavigation: function () {
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var prev = this.$(this.defaultConf.navigation.prevEl);
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var next = this.$(this.defaultConf.navigation.nextEl);
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prev.innerText = "<";
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next.innerText = ">";
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this.BindNavigationClick(prev, next)
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},
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// 为上一页下一页按钮绑定切换事件
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BindNavigationClick() {
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// var a = this
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// 下一页
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this.$(this.defaultConf.navigation.nextEl).onclick = () => {
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this.animation(-this.f)
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this.UserConfig.pagination && this.ChangeDotActive()
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}
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// 上一页
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this.$(this.defaultConf.navigation.prevEl).onclick = () => {
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this.animation(this.f)
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this.UserConfig.pagination && this.ChangeDotActive()
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}
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},
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// 切换动画
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animation(offset) {
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var swiperWrapper = this.$(this.defaultConf.wrapper);
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var y = parseInt(swiperWrapper.style.left) + offset,
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max = -(this.f * (this.slideArr.length - 1));
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// 如果时最后一张图
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if (y < max) {
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if (this.defaultConf.config.loop) {
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swiperWrapper.style.left = "0px";
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} else if (this.defaultConf.config.auto) {
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this.defaultConf.reverse = true
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this.animation(this.f)
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}
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return;
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// 判断是不是第一张图
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} else if (y > 0) {
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if (this.defaultConf.config.loop == false && this.defaultConf.config.auto) {
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this.defaultConf.reverse = false
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swiperWrapper.style.left = `${y - this.f * 2}px`
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}
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if (this.defaultConf.config.loop) {
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swiperWrapper.style.left = `${max}px`
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}
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return
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} else {
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if (this.defaultConf.config.loop == false
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&& this.defaultConf.config.auto
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&& this.defaultConf.reverse) {
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swiperWrapper.style.left = `${y}px`
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} else {
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swiperWrapper.style.left = `${y}px`
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}
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}
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},
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ChangeDotActive(type = null) {
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var Dot = this._(`${this.defaultConf.pagination.el} .swiper-dot`);
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var index = "";
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if (type == null) {
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var TotalLeft = Math.abs(parseInt(this.$(this.defaultConf.wrapper).style.left));
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index = TotalLeft / this.f;
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} else {
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index = type;
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}
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// 实现调用用户传入的方法，返回下标给用户
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this.CallMethods()
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// 清除所有的激活样式
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Dot.forEach(val => val.className = "swiper-dot");
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// 为你点击的li加激活样式
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Dot[index].className = "swiper-dot swiper-active";
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},
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AutoPlay() {
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this.defaultConf.timer = setInterval(() => {
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if (this.defaultConf.config.loop == false
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&& this.defaultConf.config.auto
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&& this.defaultConf.reverse) {
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this.animation(this.f)
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} else {
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this.animation(-this.f)
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}
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this.UserConfig.pagination && this.ChangeDotActive()
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}, this.defaultConf.config.time * 1000)
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this.$(this.defaultConf.ParentElement).onmouseover = function () {
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clearInterval(this.defaultConf.timer)
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}
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this.$(this.defaultConf.ParentElement).onmouseout = () => {
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this.AutoPlay()
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}
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},
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// 通过js调用此方法，实现轮播图的切换
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slideTo(index) {
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this.$(this.defaultConf.wrapper).style.left = `-${index * this.f}px`;
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this.UserConfig.pagination && this.ChangeDotActive()
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},
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$: function (className) {
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return document.querySelector(className)
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},
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_: function (className) {
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return document.querySelectorAll(className)
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}
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}
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window.swiper = Swiper
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})() |