Question

我正在尝试制作一个新闻快讯。

我快到了，但是它会在淡入淡出过渡时出现错误，而不是平滑淡入下一个项目。

有人可以指出正确的解决方法吗？谢谢

我认为它在淡入/淡出时需要做的事情，因为它一次显示两个li，然后格式化异常

codepen链接：https://codepen.io/anon/pen/zbajVG

<head>
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
</head>
<body>
<div class="news-ticker" data-speed="5000">
<div class="ticker-title">Important Announcements |</div>
<ul>
<li>Lorem ipsum dolor sit amet, consectetur adipiscing elit 1....</li>
<li>Lorem ipsum dolor sit amet, consectetur adipiscing elit 2....</li>
</ul>

<div class="ticker-nav">
<span class="fa-stack fa-2x">
  <i class="fas fa-square fa-stack-2x"></i>
  <i class="fas fa-arrow-left fa-stack-1x" style="color:white"></i>
</span>
<span class="fa-stack fa-2x">
  <i class="fas fa-square fa-stack-2x"></i>
  <i class="fas fa-arrow-right fa-stack-1x" style="color:white"></i>
</span>
</div>
</div>

css

body {
margin: 0;
background: #002653;
}

.news-ticker {
width: 70%;
position: absolute;
padding: 20px;
margin: 20px;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
top: 0;
left: 0;
background-image: linear-gradient(#FEFEFE, #C3C3C3);
color: #002653;
font-family: 'Open Sans', sans-serif;
border-radius:10px;
}

.news-ticker .ticker-title {
font-weight: 600;
float:left;
width:23%;
text-transform:uppercase;
letter-spacing:0.08em;

}

.news-ticker ul {
list-style: none;
padding: 0;
margin: 0;

}

.news-ticker li {
position: relative;
padding: 0;
margin: 0;
text-align: left;
top: 50%;
list-style:none;
float:left;
}

.ticker-nav {
width: 150px;
height: 50px;
position: absolute;
right: 0;
cursor: pointer;
padding: 0;
margin: 0 10px 0px 0px;
text-align: right;
top: 10%;
}

.news-ticker .fa-stack {
font-size: 1.5em;
margin: 0;
padding: 0;
width:2em;
}

.ticker-nav span {
 margin:0;
 padding: 0;
}

jquery

 jQuery(document).ready(function($){

 var tickerSpeed = $('.news-ticker').attr('data-speed');

 $('.news-ticker ul li').hide();
 $('.news-ticker ul li:first').show();

 var currentSlide = 0;
 var slideCount = ($('.news-ticker li').length) - 1;

 var startTicker = setInterval(function(){

 $('.news-ticker ul li').eq(currentSlide).fadeOut(500)

 if (currentSlide < slideCount) {
  currentSlide += 1;
 } else {
  currentSlide = 0;
 }

 $('.news-ticker ul li').eq(currentSlide).fadeIn(500)

 }, tickerSpeed);


 });

Answer 1

问题是您为列表元素选择了relative位置。您不能以这种方式将它们彼此堆叠，因此在较短的时间范围内，两个元素都可见，并且第二个ist放在第一个之下。

一种简单的解决方案是使用absolute位置并相应地更改位置（顶部，左侧）以保持当前设计

例如：（codepen fork）

jQuery(document).ready(function($) {

  var tickerSpeed = $('.news-ticker').attr('data-speed');

  $('.news-ticker ul li').hide();
  $('.news-ticker ul li:first').show();

  var currentSlide = 0;
  var slideCount = ($('.news-ticker li').length) - 1;

  var startTicker = setInterval(function() {

    $('.news-ticker ul li').eq(currentSlide).fadeOut(500)

    if (currentSlide < slideCount) {
      currentSlide += 1;
    } else {
      currentSlide = 0;
    }

    $('.news-ticker ul li').eq(currentSlide).fadeIn(500)

  }, tickerSpeed);


});

body {
  margin: 0;
  background: #002653;
}

.news-ticker {
  width: 70%;
  position: absolute;
  padding: 20px;
  margin: 20px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  top: 0;
  left: 0;
  background-image: linear-gradient(#FEFEFE, #C3C3C3);
  color: #002653;
  font-family: 'Open Sans', sans-serif;
  border-radius: 10px;
}

.news-ticker .ticker-title {
  font-weight: 600;
  float: left;
  width: 23%;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.news-ticker ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.news-ticker li {
  position: absolute;
  padding: 0;
  margin: 0;
  text-align: left;
  top: 33%;
  left: 30%;
  list-style: none;
  float: left;
}

.ticker-nav {
  width: 150px;
  height: 50px;
  position: absolute;
  right: 0;
  cursor: pointer;
  padding: 0;
  margin: 0 10px 0px 0px;
  text-align: right;
  top: 10%;
}

.news-ticker .fa-stack {
  font-size: 1.5em;
  margin: 0;
  padding: 0;
  width: 2em;
}

.ticker-nav span {
  margin: 0;
  padding: 0;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

<head>
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
</head>

<body>
  <div class="news-ticker" data-speed="5000">
    <div class="ticker-title">!</div>
    <ul>
      <li> ------------ </li>
      <li> |||||||||||| </li>
    </ul>

    <div class="ticker-nav">
      <span class="fa-stack fa-2x">
      <i class="fas fa-square fa-stack-2x"></i>
      <i class="fas fa-arrow-left fa-stack-1x" style="color:white"></i>
    </span>
      <span class="fa-stack fa-2x">
      <i class="fas fa-square fa-stack-2x"></i>
      <i class="fas fa-arrow-right fa-stack-1x" style="color:white"></i>
    </span>
    </div>


  </div>

淡入和淡出时jquery新闻行情记录仪正在调试

1 个答案: