轮播图

最新推荐文章于 2022-11-04 09:23:03 发布

LW0512

最新推荐文章于 2022-11-04 09:23:03 发布

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分类专栏：轮播图

本文链接：https://blog.youkuaiyun.com/LW0512/article/details/108853143

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1 篇文章

订阅专栏

本文介绍了使用HTML和CSS实现简单轮播图和无缝连接焦点图的方法，包括相框布局、图片切换动画以及导航点交互。代码详细展示了如何通过JavaScript进行事件监听和动画控制，实现图片的自动播放和手动切换效果。

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简单轮播图

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title></title>
  <style>
    * {
      margin: 0;
      padding: 0
    }

    ul {
      list-style: none
    }

    img {
      vertical-align: top
    }

    .box {
      width: 730px;
      height: 454px;
      margin: 100px auto;
      padding: 5px;
      border: 1px solid #ccc;
    }

    .inner {
      width: 730px;
      height: 454px;
      background-color: pink;
      overflow: hidden;
      position: relative;
    }

    .inner ul {
      width: 1000%;
      position: absolute;
      top: 0;
      left: 0;
	  /* border: 10px solid blue; */
    }

    .inner li {
      float: left;
    }

    .square {
      position: absolute;
      right: 10px;
      bottom: 10px;
    }

    .square span {
      display: inline-block;
      width: 16px;
      height: 16px;
      background-color: #fff;
      text-align: center;
      line-height: 16px;
      cursor: pointer;
    }

    .square span.current {
      background-color: orangered;
      color: #fff;
    }

  </style>
</head>
<body>
<div class="box" id="box">
  <div class="inner"><!--相框-->
    <ul>
      <li><a href="#"><img src="images/1.jpg" alt=""/></a></li>
      <li><a href="#"><img src="images/2.jpg" alt=""/></a></li>
      <li><a href="#"><img src="images/3.jpg" alt=""/></a></li>
      <li><a href="#"><img src="images/4.jpg" alt=""/></a></li>
      <li><a href="#"><img src="images/5.jpg" alt=""/></a></li>
      <li><a href="#"><img src="images/6.jpg" alt=""/></a></li>
    </ul>
    <div class="square">
      <span class="current">1</span>
      <span>2</span>
      <span>3</span>
      <span>4</span>
      <span>5</span>
      <span>6</span>
    </div>
  </div>
</div>
<script src="./common.js"></script>
<script>
	//获取box
	var box = mFun$("box");
	//获取相框
	var inner = box.children[0];
	//获取相框宽度
	var imgWidth = inner.offsetWidth;
	console.log(imgWidth);
	//获取ul
	var ulObj = inner.children[0];
	//获取span
	var span = inner.children[1].children;
	
	for(var i = 0;i < span.length;i++){
		span[i].setAttribute("index",i);
		span[i].onmouseover = function(){
			for(var j = 0; j < span.length;j++){
				span[j].removeAttribute("class");
			}
			this.className = "current";
			var index = this.getAttribute("index");
			animate(ulObj,-index*imgWidth);
		}
	}
	function animate(element,target){
		clearInterval(element.timeId);
		var timeId = setInterval(function(){
			var dv = element;
			dvLeft = dv.offsetLeft;
			var step = 10;
			step = dvLeft < target?step:-step;
// 			step = 10;
// 			step = -10;
			dvLeft+=step;
			//|-700| > |-10|
			element.style.left = dvLeft+"px";
			if(dvLeft = target){clearInterval(timeId)}
			if(Math.abs(target-dvLeft) > Math.abs(step)){
				element.style.left = dvLeft+"px";
			}else{
				clearInterval(timeId)
				element.style.left = target+"px";
			}
		},10);
	}
</script>
</body>
</html>

无缝连接焦点图

<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="UTF-8">
  <title></title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    ul {
      list-style: none;

    }

    img {
      vertical-align: top;
    }

    /*取消图片底部3像素距离*/
    .box {
      width: 300px;
      height: 200px;
      margin: 100px auto;
      background-color: pink;
      border: 1px solid red;
      position: relative;
      overflow: hidden;
    }
    .box ul li {
      float: left;
    }

    .box ul {
      width: 1500px;
      position: absolute;
      left: 0;
      top: 0;
    }
  </style>
</head>
<body>
<div class="box" id="screen">
  <ul>
    <li><img src="imagess/01.jpg" alt=""/></li>
    <li><img src="imagess/02.jpg" alt=""/></li>
    <li><img src="imagess/03.jpg" alt=""/></li>
    <li><img src="imagess/04.jpg" alt=""/></li>
    <li><img src="imagess/01.jpg" alt=""/></li>
  </ul>
</div>
<script src="common.js"></script>
<script>
	//初始位置
  var current=0;
function f1(){
  var ul=mFun$("screen").children[0];
  current-=10;
  if(current<-1200){
    ul.style.left=0+"px";
    current=0;
  }else{
    ul.style.left=current+"px";
  }
}
var timeId = setInterval(f1,10);
	mFun$("screen").onmouseover = function(){
		//停止
		clearInterval(timeId);
	}
	mFun$("screen").onmouseout = function(){
		//继续
		timeId = setInterval(f1,10);
	}
</script>
</body>
</html>

完整的轮播图

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title></title>
  <style type="text/css">
    * {
      padding: 0;
      margin: 0;
      list-style: none;
      border: 0;
    }

    .all {
      width: 500px;
      height: 200px;
      padding: 7px;
      border: 1px solid #ccc;
      margin: 100px auto;
      position: relative;
    }

    .screen {
      width: 500px;
      height: 200px;
      overflow: hidden;
      position: relative;
    }

    .screen li {
      width: 500px;
      height: 200px;
      overflow: hidden;
      float: left;
    }

    .screen ul {
      position: absolute;
      left: 0;
      top: 0px;
      width: 3000px;
    }

    .all ol {
      position: absolute;
      right: 10px;
      bottom: 10px;
      line-height: 20px;
      text-align: center;
    }

    .all ol li {
      float: left;
      width: 20px;
      height: 20px;
      background: #fff;
      border: 1px solid #ccc;
      margin-left: 10px;
      cursor: pointer;
    }

    .all ol li.current {
      background: #DB192A;
    }

    #arr {
      display: none;
    }

    #arr span {
      width: 40px;
      height: 40px;
      position: absolute;
      left: 5px;
      top: 50%;
      margin-top: -20px;
      background: #000;
      cursor: pointer;
      line-height: 40px;
      text-align: center;
      font-weight: bold;
      font-family: '黑体';
      font-size: 30px;
      color: #fff;
      opacity: 0.3;
      border: 1px solid #fff;
    }

    #arr #right {
      right: 5px;
      left: auto;
    }
  </style>
</head>
<body>
<div class="all" id='box'>
  <div class="screen"><!--相框-->
    <ul>
      <li><img src="images/1.jpg" width="500" height="200"/></li>
      <li><img src="images/2.jpg" width="500" height="200"/></li>
      <li><img src="images/3.jpg" width="500" height="200"/></li>
      <li><img src="images/4.jpg" width="500" height="200"/></li>
      <li><img src="images/5.jpg" width="500" height="200"/></li>
    </ul>
    <ol>
    </ol>
  </div>
  <div id="arr"><span id="left">&lt;</span><span id="right">&gt;</span></div>
</div>
<script src="common.js"></script>
<script>
  //获取最外面的div
  var box = mFun$("box");
  //获取相框
  var screen = box.children[0];
  //获取相框的宽度
  var imgWidth = screen.offsetWidth;
  //获取ul
  var ulObj = screen.children[0];
  //获取ul中的所有的li
  var list = ulObj.children;
  //获取ol
  var olObj = screen.children[1];
  //焦点的div
  var arr = mFun$("arr");

  var pic = 0;//全局变量
  //创建小按钮----根据ul中的li个数
  for (var i = 0; i < list.length; i++) {
    //创建li标签,加入到ol中
    var liObj = document.createElement("li");
    olObj.appendChild(liObj);
    liObj.innerHTML = (i + 1);
    //在每个ol中的li标签上添加一个自定义属性,存储索引值
    liObj.setAttribute("index", i);
    //注册鼠标进入事件
    liObj.onmouseover = function () {
      //先干掉所有的ol中的li的背景颜色
      for (var j = 0; j < olObj.children.length; j++) {
        olObj.children[j].removeAttribute("class");
      }
      //设置当前鼠标进来的li的背景颜色
      this.className = "current";
      //获取鼠标进入的li的当前索引值
      pic = this.getAttribute("index");
      //移动ul
      animate(ulObj, -pic * imgWidth);
    };
  }
  //设置ol中第一个li有背景颜色
  olObj.children[0].className = "current";
  //克隆一个ul中第一个li,加入到ul中的最后=====克隆
  ulObj.appendChild(ulObj.children[0].cloneNode(true));

  //自动播放
 var timeId= setInterval(clickHandle,1000);

  //鼠标进入到box的div显示左右焦点的div
  box.onmouseover = function () {
    arr.style.display = "block";
    //鼠标进入废掉之前的定时器
    clearInterval(timeId);
  };
  //鼠标离开到box的div隐藏左右焦点的div
  box.onmouseout = function () {
    arr.style.display = "none";
    //鼠标离开自动播放
    timeId= setInterval(clickHandle,1000);
  };
  //右边按钮
  mFun$("right").onclick =clickHandle;
  function clickHandle() {
    //如果pic的值是5,恰巧是ul中li的个数-1的值,此时页面显示第六个图片,而用户会认为这是第一个图,
    //所以,如果用户再次点击按钮,用户应该看到第二个图片
    if (pic == list.length - 1) {
      //如何从第6个图,跳转到第一个图
      pic = 0;//先设置pic=0
      ulObj.style.left = 0 + "px";//把ul的位置还原成开始的默认位置
    }
    pic++;//立刻设置pic加1,那么此时用户就会看到第二个图片了
    animate(ulObj, -pic * imgWidth);//pic从0的值加1之后,pic的值是1,然后ul移动出去一个图片
    //如果pic==5说明,此时显示第6个图(内容是第一张图片),第一个小按钮有颜色,
    if (pic == list.length - 1) {
      //第五个按钮颜色干掉
      olObj.children[olObj.children.length - 1].className = "";
      //第一个按钮颜色设置上
      olObj.children[0].className = "current";
    } else {
      //干掉所有的小按钮的背景颜色
      for (var i = 0; i < olObj.children.length; i++) {
        olObj.children[i].removeAttribute("class");
      }
      olObj.children[pic].className = "current";
    }

  };
  //左边按钮
  mFun$("left").onclick = function () {
    if (pic == 0) {
      pic = 5;
      ulObj.style.left = -pic * imgWidth + "px";
    }
    pic--;
    animate(ulObj, -pic * imgWidth);
    //设置小按钮的颜色---所有的小按钮干掉颜色
    for (var i = 0; i < olObj.children.length; i++) {
      olObj.children[i].removeAttribute("class");
    }
    //当前的pic索引对应的按钮设置颜色
    olObj.children[pic].className = "current";

  };

  //设置任意的一个元素,移动到指定的目标位置
  function animate(element, target) {
    clearInterval(element.timeId);
    //定时器的id值存储到对象的一个属性中
    element.timeId = setInterval(function () {
      //获取元素的当前的位置,数字类型
      var current = element.offsetLeft;
      //每次移动的距离
      var step = 10;
      step = current < target ? step : -step;
      //当前移动到位置
      current += step;
      if (Math.abs(current - target) > Math.abs(step)) {
        element.style.left = current + "px";
      } else {
        //清理定时器
        clearInterval(element.timeId);
        //直接到达目标
        element.style.left = target + "px";
      }
    }, 10);
  }
</script>
</body>
</html>