<div class="w"> <div id="slideshow"> <img src="../images/pop.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;"> <img src="../images/poc.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;"> </div> <script> function fun() { var a = Math.random() * 5; $('img').attr('src', '../images/pop.gif' + a + '../images/poc.gif'); } </script> </div>无法实现

这段代码无法实现图片轮播的功能，因为在fun()函数中的图片路径拼接方式是错误的。正确的做法应该是将两个图片路径分别存储到数组中，然后通过随机数来选择其中一个路径，再将其赋值给img元素的src属性。修改后的代码如下：

<div class="w">
  <div id="slideshow">
    <img src="../images/pop.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;">
    <img src="../images/poc.gif" onclick="fun()" alt="" style="width: 600px;height: 450px;margin-left: 5px;">
  </div>
  <script>
    function fun() {
      var paths = ['../images/pop.gif', '../images/poc.gif'];
      var randomIndex = Math.floor(Math.random() * paths.length);
      $('img').attr('src', paths[randomIndex]);
    }
  </script>
</div>

这样就可以实现图片轮播的效果了。

相关问题

用以下代码写一个轮播图<ul> <li><img src="../images/1.jpg" alt=""></li> <li><img src="../images/2.jpg" alt=""></li> <li><img src="../images/3.jpg" alt=""></li> <li><img src="../images/4.jpg" alt=""></li> <li><img src="../images/5.jpg" alt=""></li> <li><img src="../images/6.jpg" alt=""></li> </ul> <span class="prev">&#10094;</span> <span class="next">&#10095;</span> </div> <script src="../jquery-3.7.0.js"></script>

你可以使用以下代码来实现一个基本的轮播图：

<div class="slideshow-container">
  <ul class="slides">
    <li><img src="../images/1.jpg" alt=""></li>
    <li><img src="../images/2.jpg" alt=""></li>
    <li><img src="../images/3.jpg" alt=""></li>
    <li><img src="../images/4.jpg" alt=""></li>
    <li><img src="../images/5.jpg" alt=""></li>
    <li><img src="../images/6.jpg" alt=""></li>
  </ul>
  <span class="prev">&#10094;</span>
  <span class="next">&#10095;</span>
</div>

<script src="../jquery-3.7.0.js"></script>
<script>
  $(document).ready(function() {
    var slideIndex = 1;
    showSlides(slideIndex);

    $(".prev").click(function() {
      showSlides(slideIndex -= 1);
    });

    $(".next").click(function() {
      showSlides(slideIndex += 1);
    });

    function showSlides(n) {
      var i;
      var slides = $(".slides li");
      if (n > slides.length) {
        slideIndex = 1
      }
      if (n < 1) {
        slideIndex = slides.length
      }
      for (i = 0; i < slides.length; i++) {
        slides[i].style.display = "none";
      }
      slides[slideIndex - 1].style.display = "block";
    }
  });
</script>

CSS代码如下：

.slideshow-container {
  position: relative;
  margin: auto;
}

.slides {
  list-style: none;
  padding: 0;
  margin: 0;
}

.slides li {
  display: none;
}

.prev, .next {
  position: absolute;
  top: 50%;
  width: auto;
  margin-top: -22px;
  padding: 16px;
  color: white;
  font-weight: bold;
  font-size: 18px;
  transition: 0.6s ease;
  border-radius: 0 3px 3px 0;
  user-select: none;
}

.next {
  right: 0;
  border-radius: 3px 0 0 3px;
}

.prev:hover, .next:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

.slides li img {
  width: 100%;
  height: auto;
}

这里的核心是使用 JavaScript 来控制轮播图。`showSlides(n)` 函数用于显示当前轮播图，其中参数 `n` 表示轮播图的索引号。通过点击“上一页”和“下一页”按钮，可以切换轮播图。在这个例子中，我们使用了 jQuery 库来简化 JavaScript 代码。

<template> <div class="swiper-size"> <swiper :options="swiperOption"> <swiper-slide v-for="(slide, index) in bannerImg" :key="index"> <img class="swiperimg" :src="slide" alt="" /> </swiper-slide> <div class="swiper-pagination" slot="pagination"></div> </swiper> </div> </template> <script> export default { data() { return { swiperOption:{ }, bannerImg: [ require("../../../assets/slideShow/j1.jpg"), require("../../../assets/slideShow/j2.jpg"), require("../../../assets/slideShow/j3.jpg"), require("../../../assets/slideShow/j4.jpg"), ], }; }, } </script>在这段代码下能不能做出只显示一张图片的轮播图

可以，只需要在 `swiperOption` 中设置 `loop` 和 `autoplay` 属性为 `false`，并且将 `slidesPerView` 属性设置为 `1`，即可实现只显示一张图片的轮播图，具体代码如下：

<template>
  <div class="swiper-size">
    <swiper :options="swiperOption">
      <swiper-slide v-for="(slide, index) in bannerImg" :key="index">
        <img class="swiperimg" :src="slide" alt="" />
      </swiper-slide>
      <div class="swiper-pagination" slot="pagination"></div>
    </swiper>
  </div>
</template>

<script>
export default {
  data() {
    return {
      swiperOption: {
        loop: false, // 不循环
        autoplay: false, // 不自动播放
        slidesPerView: 1 // 每次只显示一张图片
      },
      bannerImg: [
        require("../../../assets/slideShow/j1.jpg")
      ],
    };
  },
}
</script>