使用jQuery的方法实现轮播图。实现的轮播图最少由3幅图组成，每隔一段时间自动切换到下一幅图，鼠标停留时显示左右切候的按钮，点击左右按钮可以切换到上一幅或下幅图；点击图下面的圆形下标，切换到对应的图。图片切换需无缝切换，首尾图片切换时无违和感.

以下是一个简单的实现轮播图的jQuery代码：

HTML代码：

<div class="slider">
  <div class="slider-content">
    <img src="img1.jpg" alt="">
    <img src="img2.jpg" alt="">
    <img src="img3.jpg" alt="">
  </div>
  <div class="slider-nav">
    <a href="#" class="prev">‹</a>
    <a href="#" class="next">›</a>
    <div class="dots">
      <a href="#" class="dot active"></a>
      <a href="#" class="dot"></a>
      <a href="#" class="dot"></a>
    </div>
  </div>
</div>

CSS代码：

.slider {
  position: relative;
}
.slider-content {
  position: relative;
  overflow: hidden;
}
.slider-content img {
  display: inline-block;
  vertical-align: top;
  width: 100%;
}
.slider-nav {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}
.slider-nav a {
  display: inline-block;
  width: 30px;
  height: 30px;
  background-color: #fff;
  color: #333;
  text-align: center;
  line-height: 30px;
  font-size: 20px;
  text-decoration: none;
  border-radius: 50%;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}
.slider-nav a:hover {
  opacity: 1;
}
.slider-nav .prev {
  margin-right: 10px;
}
.slider-nav .dots {
  display: inline-block;
  margin-left: 20px;
}
.slider-nav .dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: #fff;
  border-radius: 50%;
  margin-right: 5px;
  opacity: 0.5;
  transition: opacity 0.3s ease;
}
.slider-nav .dot.active {
  opacity: 1;
}

jQuery代码：

$(function() {
  var $slider = $('.slider'),
      $content = $slider.find('.slider-content'),
      $imgs = $content.find('img'),
      $nav = $slider.find('.slider-nav'),
      $prev = $nav.find('.prev'),
      $next = $nav.find('.next'),
      $dots = $nav.find('.dot'),
      imgCount = $imgs.length,
      currentIndex = 0,
      intervalId;

  // 初始化
  function init() {
    $content.css({width: imgCount * 100 + '%'});
    $imgs.css({width: 100 / imgCount + '%'});
    $dots.eq(currentIndex).addClass('active');
    startAutoPlay();
  }

  // 自动播放
  function startAutoPlay() {
    intervalId = setInterval(function() {
      currentIndex++;
      if (currentIndex === imgCount) {
        currentIndex = 0;
      }
      gotoImg(currentIndex);
    }, 3000);
  }

  // 停止自动播放
  function stopAutoPlay() {
    clearInterval(intervalId);
  }

  // 切换到指定的图片
  function gotoImg(index) {
    $content.animate({left: -index * 100 + '%'}, function() {
      if (index === imgCount - 1) {
        currentIndex = -1;
        $content.css({left: 0});
      }
    });
    $dots.removeClass('active').eq(index).addClass('active');
  }

  // 绑定事件
  $slider.hover(function() {
    stopAutoPlay();
    $prev.show();
    $next.show();
  }, function() {
    startAutoPlay();
    $prev.hide();
    $next.hide();
  });
  $prev.click(function() {
    currentIndex--;
    if (currentIndex === -1) {
      currentIndex = imgCount - 1;
      $content.css({left: -currentIndex * 100 + '%'});
    }
    gotoImg(currentIndex);
  });
  $next.click(function() {
    currentIndex++;
    if (currentIndex === imgCount) {
      currentIndex = 0;
      $content.css({left: 0});
    }
    gotoImg(currentIndex);
  });
  $dots.click(function() {
    var index = $(this).index();
    currentIndex = index;
    gotoImg(currentIndex);
  });

  // 初始化
  init();
});

以上代码包含了自动播放、停止自动播放、切换到指定的图片、绑定事件等功能，你可以根据自己的需要进行修改和扩展。