单行文字垂直/水平跑马灯效果

时间 2019-12-13

标签单行文字垂直水平马灯效果繁體版

原文原文链接

需求描述

接到的需求是这样的：跑马灯效果一次展现一行文字循环滚动文字滚动到视野中停留一秒后滚出。
静态效果以下图，文字从下往上或者从右往左滚动，滚动到此位置时停留一秒（不会传动图...
javascript

网络上有比较多的多行文字循环滚动的demo,找了一下好像能知足单行而且可停留一秒的比较少（emmm可能我没认真找
下面贴出个人最终解决方案。css

解决方案

垂直方向滚动

使用一个定时器不断改变最外层div的scrollTop，为了能循环滚动，增长一个与con1同样的con2
PS：这里的time选用1000/60是由于想要模拟window.requestAnimationFrame(通常1000ms60帧，固然了，你也能够直接使用requestAnimationFrame代替setInterval，效果更好html

<!DOCTYPE html>
<html>
<head>
    <title>单行文字垂直跑马灯效果</title>
    <style type="text/css">
    ul,li{
        list-style:none;
        display:block;
        margin: 0;
        padding: 0;
    }
    #loop-show-box {
      width: 300px;
      height: 25px;
      line-height: 25px;
      background: red;
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      overflow: hidden;
    }
    .li-style {
      width: 100%;
      height: 25px;
      text-align: center;
    }
    </style>
</head>
<body>
<div id="loop-show-box">
  <ul id="con1">
    <li class="li-style">测试1号</li>
    <li class="li-style">测试2号</li>
    <li class="li-style">测试3号</li>
    <li class="li-style">测试4号</li>
  </ul>
  <ul id="con2"></ul>
</div>
<script type="text/javascript">
  var area = document.getElementById('loop-show-box');
  var con1 = document.getElementById('con1');
  var con2 = document.getElementById('con2');
  var mytimer1 = null;
  var mytimer = null;
  var time = 1000 / 60;
  con2.innerHTML = con1.innerHTML;
  function scrollUp () {
    if (area.scrollTop >= con1.offsetHeight) {
      area.scrollTop = 0;
    } else {
      if (area.scrollTop % 25 == 0) {
        clearInterval(mytimer);
        clearInterval(mytimer1);
        mytimer1 = setTimeout(function () {
          mytimer = setInterval(scrollUp, time);
        }, 1000);
      }
      area.scrollTop++;
    }
  }
  mytimer = setInterval(scrollUp, time);
</script>
</body>
</html>

水平方向滚动

水平方法滚动的具体实现其实跟垂直方向相似的，不一样的是要改变的是容器的scrollLeftjava

<!DOCTYPE html>
<html>
<head>
  <title>单行文字水平跑马灯效果</title>
  <style type="text/css">
    *{
      margin: 0;
      padding: 0;
    }
    .container {
      width: 400px;
      height: 25px;
      display: flex;
      flex-direction: row;
      justify-content: center;
      align-items: center;
      margin: 100px auto;
    }
    .icon {
      width: 15px;
      margin-right: 15px;
    }
    #loop-show-box {
      width: 300px;
      height: 25px;
      line-height: 25px;
      background: red;
      overflow: auto;
      white-space: nowrap;
    }
    .li-style {
      width: 300px;
      height: 25px;
      text-align: left;
      /*使用inline-block的时候两个item之间会存在间距（固然了你能够把它们写在一行以去除这样的间距*/
      display: inline-flex;
    }
    #con1,#con2 {
      display: inline-flex;
    }
  </style>
</head>
<body>
<div class="container">
  <img src="img/horn.png" class="icon">
  <div id="loop-show-box">
    <div id="con1">
      <div class="li-style">测试1号</div>
      <div class="li-style">测试2号</div>
      <div class="li-style">测试3号</div>
      <div class="li-style">测试4号</div>
      <div class="li-style">测试5号</div>
      <div class="li-style">测试6号</div>
    </div>
    <div id="con2"></div>
  </div>
</div>
<script type="text/javascript">
  var area = document.getElementById('loop-show-box');
  var con1 = document.getElementById('con1');
  var con2 = document.getElementById('con2');
  var mytimer1 = null;
  var mytimer = null;
  var time = 1000 / 60;
  con2.innerHTML = con1.innerHTML;
  function scrollUp () {
    if (area.scrollLeft >= con1.offsetWidth) {
      area.scrollLeft = 0;
    } else {
      // 可根据想要的速度调节步长
      area.scrollLeft += 2;
      if (area.scrollLeft % 300 == 0) {
        clearInterval(mytimer);
        clearInterval(mytimer1);
        mytimer1 = setTimeout(function () {
          mytimer = setInterval(scrollUp, time);
        }, 1000);
      }
    }
  }
  mytimer1 = setTimeout(function () {
    mytimer = setInterval(scrollUp, time);
  }, 1000)
</script>
</body>
</html>