lovecoding
/
VIP20


			
				
					
						
						
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							<!-- 
  author: zsy
  date: 2022-10-29
  轮播图
-->
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="font/iconfont.css">
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    ul {
      list-style: none;
    }

    #container {
      width: 590px;
      height: 470px;
      margin: 100px auto;
      position: relative;
    }

    .actived {
      display: none;
    }

    .choice {
      display: block;
    }

    #btns {
      position: absolute;
      right: 20px;
      bottom: 20px;
    }

    #btns li {
      width: 20px;
      height: 20px;
      text-align: center;
      line-height: 20px;
      background: cyan;
      border-radius: 10px;
      color: white;
      float: left;
      margin-right: 7px;
    }

    #btns .select {
      background: red;
    }

    #prev,
    #next {
      width: 40px;
      height: 40px;
      position: absolute;
      top: 215px;
      opacity: 0.4;
      display: none;
    }

    #next {
      right: 0;
    }

    #prev span {
      font-size: 40px;
    }

    #next span {
      font-size: 40px;
    }
  </style>
</head>

<body>
  <div id="container">
    <div id="img-box">
      <img class="actived choice" src="image/1.jpg" alt="">
      <img class="actived" src="image/2.jpg" alt="">
      <img class="actived" src="image/3.jpg" alt="">
      <img class="actived" src="image/4.jpg" alt="">
      <img class="actived" src="image/5.jpg" alt="">
    </div>
    <ul id="btns">
      <li class="select">1</li>
      <li>2</li>
      <li>3</li>
      <li>4</li>
      <li>5</li>
    </ul>
    <div id="prev">
      <span class="iconfont icon-shangyige"></span>
    </div>
    <div id="next">
      <span class="iconfont icon-xiayige"></span>
    </div>
  </div>
  <script>
    var con = document.getElementById('container')
    var btns = document.getElementById('btns')
    var uli = btns.getElementsByTagName('li')
    var imgs = document.getElementsByClassName('actived')
    var next = document.getElementById('next')
    var prev = document.getElementById('prev')

    var iNow = 0;
    //循环按钮的每一项
    for (var i = 0; i < uli.length; i++) {
      //给点击的按钮 索引提取出来
      uli[i].index = i
      //按钮的点击事件
      uli[i].onclick = function () {
        // for (var j = 0; j < uli.length; j++) {
        //   uli[j].className = ''
        //   imgs[j].className = 'actived'
        // }
        // iNow = this.index
        // this.className = 'select'// this =>uli[i]
        // imgs[this.index].className = 'actived choice'
        //给全局图片的变量  赋值为当前点击的索引
        iNow = this.index
        //传参
        myFun(iNow)
      }
    }
    //点击下一个
    next.onclick = function () {
      iNow++;
      console.log(iNow)
      if (iNow > 4) {
        iNow = 0
      }
      myFun(iNow)
    }
    //点击上一个
    prev.onclick = function () {
      iNow--;
      if (iNow < 0) {
        iNow = 4 //uli.length
      }
      myFun(iNow)
    }
    //清空样式，找到点击的索引设置样式
    var myFun = function (xx) {
      //清空所有样式
      for (var i = 0; i < uli.length; i++) {
        uli[i].className = ''
        imgs[i].className = 'actived'
      }
      //给点击的按钮设置样式
      uli[xx].className = 'select'
      //找到点击按钮的索引 给相应的图片设置样式
      imgs[xx].className = 'actived choice'
    }

    //鼠标划入在上面移动 onmousemove
    //鼠标划出 onmouseout
    //鼠标划入事件
    con.onmousemove = function () {
      next.style.display = 'block'
      prev.style.display = 'block'
      clearInterval(timer)
    }
    //鼠标划出事件
    con.onmouseout = function () {
      next.style.display = 'none'
      prev.style.display = 'none'
      timer = setInterval(function () {
        next.onclick()
      }, 1000)
    }
    //设置定时器，自动执行点击下一个事件
    var timer = setInterval(function () {
      next.onclick()
    }, 1000)
  </script>
</body>

</html>