效果图PC端:
- 支持点击浏览
- 支持方向键浏览
- 支持图片延迟加载
- 支持自动定时加载
效果图手机端:
- 支持自动定时加载
- 支持图片延迟加载
- 支持点击浏览
- 支持触屏滑动浏览
HTML代码片段:
<div class="slide"> <ul></ul> <div class="dot"></div> </div>
CSS代码片段:
.slide {position: relative; max-width: 440px;min-height: 480px; overflow: hidden; margin: 0px auto; } .slide:after {content: ''; display: block; width: 100%; padding-top: 50%; } .slide ul {position: absolute;left: 0; top: 0;width: 100%;height: 100%;padding: 0;margin: 0;} .slide li {list-style: none;position: absolute;left: 0;top: 0;width: 100%;height: 100%;} .slide li:first-child {z-index: 1;} .slide li.cur {z-index: 1;transition:left .2s linear;} .slide li img {position: absolute;left: 0; top: 0;width: 100%;height: 100%;border: none;} .slide .dot {position: absolute; left: 50%; bottom: 10px;margin-left: -40px; font-size: 0;z-index: 2;} .slide .dot span {display:inline-block;padding: 6px;margin-left:4px;-moz-border-radius:50%; -webkit-border-radius:50%; border-radius:50%;background:#fff;cursor: pointer} .slide .dot .cur {background:#34c751}
JS代码片段:
// 设置图片源 var imgData = [ 'http://ww1.sinaimg.cn/bmiddle/9e5389bbjw1ez7jiqwwi9j20dw0dw76i.jpg', 'http://ww3.sinaimg.cn/bmiddle/9e5389bbjw1ez7jirk5urj20dw0dwgnp.jpg', 'http://ww3.sinaimg.cn/bmiddle/9e5389bbjw1ez7jis72jcj20dw0dwmz9.jpg', 'http://ww4.sinaimg.cn/bmiddle/9e5389bbjw1ez7jist323j20dw0dwq4i.jpg', 'http://ww1.sinaimg.cn/bmiddle/9e5389bbjw1ez7jithb2gj20dw0dwjss.jpg', 'http://ww3.sinaimg.cn/bmiddle/9e5389bbjw1ez7jiu53trj20dw0dwdhq.jpg', 'http://ww2.sinaimg.cn/bmiddle/9e5389bbjw1ez7jixx545j20dw0dwn04.jpg', 'http://ww3.sinaimg.cn/bmiddle/9e5389bbjw1ez7jiymhv8j20dw0dw0vh.jpg', 'http://ww1.sinaimg.cn/bmiddle/9e5389bbjw1ez7jiza47wj20dw0dw40q.jpg' ]; var imgSize = imgData.length; var slideObj = document.querySelector('.slide'); var slideUlObj = document.querySelector('.slide ul'); var dotObj = slideObj.querySelector('.dot'); dotObj.style.marginLeft = -8 * imgSize + 'px'; for (var i = 0; i < imgSize; i++) { var liObj = document.createElement('li'); var imgObj = document.createElement('img'); var imgSrc = imgData[i]; // 添加延迟加载图片机制 if (i == 0) imgObj.src = imgSrc; else imgObj.dataset.src = imgSrc; liObj.appendChild(imgObj); slideUlObj.appendChild(liObj); var spanObj = document.createElement('span'); if (i == 0) spanObj.className = 'cur'; // 绑定圆圈点击事件 spanObj.onclick = function() { var index = Array.prototype.indexOf.call(dotObj, this); swipeImg(index); }; dotObj.appendChild(spanObj); } var curIndex = 1; var imgObj = slideObj.querySelectorAll('ul li'); var dotObj = slideObj.querySelectorAll('.dot span'); var swipeImg = function(index) { index = index >= imgSize ? 0 : index < 0 ? imgSize - 1 : index; for (var i = 0; i < imgSize; i++) { dotObj[i].className = ''; imgObj[i].className = ''; } var curImgObj = imgObj[index]; dotObj[index].className = 'cur'; curImgObj.className = 'cur'; var imgSubObj = curImgObj.querySelector('img'); if (imgSubObj.dataset.src) { imgSubObj.src = imgSubObj.dataset.src; delete imgSubObj.dataset.src; } curIndex = index; }; setInterval(function() { swipeImg(curIndex); curIndex++; }, 3000); var touchEvent = { // 判断设备是否支持touch事件 touch: ('ontouchstart' in window) || window.DocumentTouch && document instanceof DocumentTouch, events: { slider: slideUlObj, handleEvent: function(event) { if (event.type == 'touchstart') { this.start(event); } else if(event.type == 'touchmove') { this.move(event); } else if(event.type == 'touchend') { this.end(event); } }, start: function(event) { event.preventDefault(); // 阻止触摸事件的默认动作,即阻止滚屏 var touch = event.touches[0]; // touches数组对象获得屏幕上所有的touch,取第一个touch startPos = { // 取第一个touch的坐标值 x: touch.pageX, y: touch.pageY, time: +new Date }; this.slider.addEventListener('touchmove', this, false); this.slider.addEventListener('touchend', this, false); }, move: function(event) { event.preventDefault(); // 阻止触摸事件的默认行为,即阻止滚屏 // 当屏幕有多个touch或者页面被缩放过,就不执行move操作 if (event.touches.length > 1 || event.scale && event.scale !== 1) return; var touch = event.touches[0]; endPos = { x: touch.pageX - startPos.x, y: touch.pageY - startPos.y }; }, // 滑动释放 end: function(event) { var duration = +new Date - startPos.time; // 滑动的持续时间 if (Number(duration) > 100) { // 判断是左移还是右移,当偏移量大于50时执行 if (endPos.x > 50) { swipeImg(curIndex - 1); } else if(endPos.x < -50) { swipeImg(curIndex + 1); } } // 解绑事件 this.slider.removeEventListener('touchmove', this, false); this.slider.removeEventListener('touchend', this, false); } } }; if(!!touchEvent.touch) touchEvent.events.slider.addEventListener('touchstart', touchEvent.events, false); document.addEventListener('keydown', function(event) { switch (event.keyCode) { case 33: case 37: case 38: swipeImg(curIndex - 1); break; case 9: case 32: case 34: case 39: case 40: swipeImg(curIndex + 1); break; } event.preventDefault(); }, false);
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