1.首先是效果圖，要在網頁中實現下圖的輪播效果，有四張圖片，每張圖片有自己的標題，然後還有右下角的小方框，滑鼠懸浮在小方框上，會切換到對應的圖片中去。
2.先是HTML中的內容，最外層是輪播圖整個的容器“slideShowContainer”，裡邊是用來裝圖片的“picUl”和用來顯示小方框的“dotUl”，以及用來裝標題的“titleDiv”。
<em><div 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> <div 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> </div><br></div><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;++i){
pic[i].style.display = "none";
dot[i].className = "unselected";
title[i].className = "hide"
}
pic[curIndex].style.display = "block";
dot[curIndex].className = "selected";
title[curIndex].className = "show";
}
/*index超出图片总量时归零*/
function autoPlay(){
if(+index >= 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 < dot.length;i++){
dot[i].onmouseover = function(){
clearInterval(timer);
index = this.innerText-1;
changePic(index)
}
}以上是html中用JS實作圖片輪播的實例程式碼的詳細內容。更多資訊請關注PHP中文網其他相關文章！
