1.首先是效果图,要在网页中实现下图的轮播效果,有四张图片,每张图片有自己的标题,然后还有右下角的小方框,鼠标悬浮在小方框上,会切换到对应的图片中去。
2.先是HTML中的内容,最外层是轮播图整个的容器“slideShowContainer”,里边是用来装图片的“picUl”和用来显示小方框的“dotUl”,以及用来装标题的“titleDiv”。
<em><p id="slideShowContainer"><br> <ul id="picUl"><br> <li><a href="#"><img src="img/lunbo1.jpg" alt=""></a></li><br> <li><a href="#"><img src="img/lunbo2.jpg" alt=""></a></li><br> <li><a href="#"><img src="img/lunbo3.jpg" alt=""></a></li><br> <li><a href="#"><img src="img/lunbo4.jpg" alt=""></a></li><br> </ul><br> <ul id="dotUl"><br> <li class="selected">1</li><br> <li class="unselected">2</li><br> <li class="unselected">3</li><br> <li class="unselected">4</li><br> </ul><br> <p id="titleDiv"><br> <span class="show"><a href="#">党政机关公务用车有了统一标识</a></span><br> <span class="hide"><a href="#">“洛阳创新”亮相第52届巴黎航展</a></span><br> <span class="hide"><a href="#">中国河洛乡愁摄影主题公园揭牌</a></span><br> <span class="hide"><a href="#">洛阳机场建成生态停车场</a></span><br> </p><br></p><br><br>3.然后是css中的样式<br></em>
#slideShowContainer{ width: 425px; height: 325px; margin-top: 10px; margin-left: 10px; overflow: hidden; position: relative;}#slideShowContainer img{ width: 425px; height: 325px; transition: all 0.6s;}#slideShowContainer img:hover{ transform: scale(1.07);}#picUl{ list-style: none;}#dotUl{ list-style: none; display: flex; flex-direction: row; position: absolute; //使用绝对布局,固定于左下角 right: 21px; bottom: 15px; z-index: 2; //通过设置z-index的值大于#titleDiv中z-index的值,使其浮在标题栏的上方}#titleDiv{ position: absolute; width: 100%; height: 42px; bottom: 0px; left: 0px; background-color: #000000; opacity:0.6; //设置透明度,实现标题栏半透明效果 z-index: 1;}#titleDiv>span{ line-height: 42px; color: #FFFFFF; margin-left: 20px; width: 270px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;}#titleDiv>span>a{ color: #FFFFFF;}.selected{ width: 12px; height: 12px; background-color: #FFFFFF; color: transparent; margin-left: 9px;}.unselected{ width: 12px; height: 12px; background-color: #0069AD; color: transparent; margin-left: 9px;}
.hide{ display: none;}.show{ display: block;}
<em>4.通过js控制,动态修改相应的样式,达到图片轮播的效果<br></em>
/*图片轮播*/var slideShowContainer = document.getElementById("slideShowContainer");var pic = document.getElementById("picUl").getElementsByTagName("li");var dot = document.getElementById("dotUl").getElementsByTagName("li");var title = document.getElementById("titleDiv").getElementsByTagName("span");var index = 0;var timer = null;/*定义图片切换函数*/function changePic (curIndex) { for(var i = 0;i = pic.length){ index = 0; } changePic(index); index++;}/*定义并调用自动播放函数*/timer = setInterval(autoPlay,1500);/*鼠标划过整个容器时停止自动播放*/slideShowContainer.onmouseover = function(){ clearInterval(timer);}/*鼠标离开整个容器时继续播放下一张*/slideShowContainer.onmouseout = function(){ timer = setInterval(autoPlay,1500);}/*遍历所有数字导航实现划过切换至对应的图片*/for(var i = 0;i
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