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纯css就能实现可点击切换的轮播图,feel起来很丝滑 #44

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Sunny-lucking opened this issue Jun 14, 2022 · 0 comments
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@Sunny-lucking
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前言

轮播图经常会在项目里用到,但是实际上用到的轮播图都是比较简单的,没有复杂的特效,这个时候如果去引入swiper那些库的话,未免就有点杀鸡焉用牛刀了。

所以不如自己手写一个,而今天我要分享的一种写法也是我最近才发现的,发现写起来真的是很丝滑,只纯css就实现了呢!

HTML <label> 标签的 for 属性的用法及作用

for 属性规定 label 与哪个表单元素绑定,label的for属性要与绑定表单元素(input)的ID对应。绑定完成后可以通过点击label触发表单元素的默认属性。通俗的讲就是你绑定完了点lebel就相当于点击表单元素(input)。

<form>
  <label for="male">Male</label>
  <input type="radio" name="sex" id="male" />
  <br />
  <label for="female">Female</label>
  <input type="radio" name="sex" id="female" />
</form>

开始实现吧

预览地址:https://sunny-lucking.github.io/howToBuiMySwiper/myswiper.html

源码地址:https://github.com/Sunny-lucking/howToBuiMySwiper/blob/main/myswiper.html

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>我的轮播图</title>
  <style>
    body {
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
    }

    ul.slides {
      position: relative;
      width: 600px;
      height: 280px;
      list-style: none;
      margin: 0;
      padding: 0;
      background-color: #eee;
    }

    li.slide {
      margin: 0;
      padding: 0;
      width: inherit;
      height: inherit;
      position: absolute;
      top: 0;
      left: 0;
      display: flex;
      justify-content: center;
      align-items: center;
      font-family: Helvetica;
      font-size: 120px;
      color: #fff;
      transition: .5s transform ease-in-out;
    }

    .slide:nth-of-type(1) {
      background-color: #F2E205;
    }

    .slide:nth-of-type(2) {
      background-color: #F25C05;
      left: 100%;
    }
    .slide:nth-of-type(3) {
      background-color: #495F8C;
      left: 200%;
    }
  </style>
</head>

<body>
  <ul class="slides">
    <li class="slide">1</li>
    <li class="slide">2</li>
    <li class="slide">3</li>
  </ul>
</body>

</html>

首先先写了所需要的三个子元素。分别给了三种颜色。

接下来。最外层加上overflow: hidden,让只显示一个slide子元素

ul.slides {
      position: relative;
      width: 600px;
      height: 280px;
      list-style: none;
      margin: 0;
      padding: 0;
      background-color: #eee;
      overflow: hidden;
    }

接下来,加上label和input起到控制切换的效果

html

<body>
  <ul class="slides">
    <input type="radio" id="control-1" name="control" checked>
    <input type="radio" id="control-2" name="control">
    <input type="radio" id="control-3" name="control">
    <li class="slide">1</li>
    <li class="slide">2</li>
    <li class="slide">3</li>
    <div class="controls-visible">
      <label for="control-1"></label>
      <label for="control-2"></label>
      <label for="control-3"></label>
    </div>
  </ul>
</body>

css

input[type="radio"] {
  position: relative;
  z-index: 100;
  display: none;
}

.controls-visible {
  position: absolute;
  width: 100%;
  bottom: 12px;
  text-align: center;
}

.controls-visible label {
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: #fff;
  border-radius: 50%;
  margin: 0 3px;
  border: 2px solid #fff;
}

.slides input[type="radio"]:nth-of-type(1):checked ~ .controls-visible label:nth-of-type(1) {
  background-color: #333;
}

.slides input[type="radio"]:nth-of-type(2):checked ~ .controls-visible label:nth-of-type(2) {
  background-color: #333;
}

.slides input[type="radio"]:nth-of-type(3):checked ~ .controls-visible label:nth-of-type(3) {
  background-color: #333;
}

这里利用input和label来模拟轮播图的pagination分页功能。label模拟的是圆点,然后吧radio输入框隐藏了。radio放在最前面的目的是为了用了控制后面的slides 和controls的 样式

现在实现点击label切换轮播图的效果

.slides input[type="radio"]:nth-of-type(1):checked ~ .slide {
  transform: translatex(0%);
}

.slides input[type="radio"]:nth-of-type(2):checked ~ .slide {
  transform: translatex(-100%);
}

.slides input[type="radio"]:nth-of-type(3):checked ~ .slide {
  transform: translatex(-200%);
}

可以看到已经非常地简单就实现了点击lebel切换轮播图的效果。

当然,我们要实现一个上下页切换的功能也非常简单

image

我们添加三组navigator,一页页面对应一组

<body>
  <ul class="slides">
    <input type="radio" id="control-1" name="control" checked>
    <input type="radio" id="control-2" name="control">
    <input type="radio" id="control-3" name="control">
    <div class="navigator slide-1">
      <label for="control-3"></label>
      <label for="control-2"></label>
    </div>

    <div class="navigator slide-2">
      <label for="control-1"></label>
      <label for="control-3"></label>
    </div>

    <div class="navigator slide-3">
      <label for="control-2"></label>
      <label for="control-1"></label>
    </div>
    <li class="slide">1</li>
    <li class="slide">2</li>
    <li class="slide">3</li>
    <div class="controls-visible">
      <label for="control-1"></label>
      <label for="control-2"></label>
      <label for="control-3"></label>
    </div>
  </ul>
</body>

我们要把不属于当前的那一页的navigator隐藏掉,所以用display:none,当选中对应的页面的时候,再让它显示出来,所以可以这样实现

    .navigator {
      position: absolute;
      top: 50%;
      transform: translatey(-50%);
      width: 100%;
      z-index: 100;
      padding: 0 20px;
      display: flex;
      justify-content: space-between;
      box-sizing: border-box;
      display: none;
    }

    .navigator {
      font-size: 32px;
      color #333333;
    }

    .slides input[type="radio"]:nth-of-type(1):checked~.navigator:nth-of-type(1) {
      display: flex;
    }

    .slides input[type="radio"]:nth-of-type(2):checked~.navigator:nth-of-type(2) {
      display: flex;
    }

    .slides input[type="radio"]:nth-of-type(3):checked~.navigator:nth-of-type(3) {
      display: flex;
    }

image

可以看到,又轻而易举就实现了点击切换上下页的功能,太腻害了。

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