jQuery+CSS3自动轮播焦点图特效源码

以下是一个使用jQuery和CSS3创建自动轮播焦点图的示例代码：

HTML部分：

<div id="slider" class="slider">
  <div class="slides">
    <div class="slide" style="background-image: url('image1.jpg');"></div>
    <div class="slide" style="background-image: url('image2.jpg');"></div>
    <div class="slide" style="background-image: url('image3.jpg');"></div>
  </div>
  <div class="navigation">
    <span class="nav-button active" data-index="0"></span>
    <span class="nav-button" data-index="1"></span>
    <span class="nav-button" data-index="2"></span>
  </div>
</div>

CSS部分：

.slider {
  position: relative;
  overflow: hidden;
  height: 400px;
}
 
.slides {
  width: 300%;
  height: 100%;
  display: flex;
  animation: slideShow 10s infinite;
}
 
.slide {
  width: 100%;
  flex: 1 0 auto;
  background-size: cover;
  background-position: center;
}
 
.navigation {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
}
 
.nav-button {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin: 0 5px;
  cursor: pointer;
  opacity: 0.4;
  transition: opacity 0.3s;
}
 
.nav-button.active {
  opacity: 1;
}
 
@keyframes slideShow {
  0% {
    transform: translateX(0);
  }
  11.1%, 33.3% {
    transform: translateX(0);
  }
  44.4%, 66.6% {
    transform: translateX(-100%);
  }
  77.7%, 100% {
    transform: translateX(-200%);
  }
}

jQuery部分：

$(document).ready(function() {
  var $slider = $('#slider');
  var $slides = $slider.find('.slides');
  var $navButtons = $slider.find('.nav-button');
 
  $navButtons.click(function() {
    var index = $(this).data('index');
    $navButtons.removeClass('active');
    $(this).addClass('active');
    $slides.css('transform', 'translateX(-' + index + '00%)');
  });
 
  // 自动轮播功能
  setInterval(function() {
    var currentIndex = $navButtons.filter('.active').data('index');
    var nextIndex = (currentIndex + 1) % $navButtons.length;
    $navButtons.eq(nextIndex).trigger('click');
  }, 5000);
});

这段代码实现了一个简单的自动轮播焦点图，其中包含了导航按钮和轮播效果。CSS动画slideShow负责图片的切换，jQuery代码则处理了导航按钮的交互和自动轮播逻辑。