CSS3實現的美觀多級下拉選單效果程式碼例項

admin發表於2017-02-17

原文網址 : https://www.softwhy.com/article-1180-1.html

本章節分享一段程式碼例項，它利用CSS3實現了美觀的多級下拉選單效果。關於CSS3的程式碼本人感覺真的沒有什麼好分析的，首先CSS比較簡單，只要理解了各個屬性的含義，明白實現過程和原理都是不成問題的，程式碼例項如下:

[HTML] 純文字檢視 複製程式碼
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="author" content="http://www.softwhy.com/" />
<title>螞蟻部落</title>
<style>
*{
  margin:0px;
  padding:0px;
}
body{
  background:#b1b1b1;
  margin:0px;
  padding:0px;
  font-size:14px;
  color:#000;
}
.tips{
  width:702px;
  margin:0 auto;
  line-height:24px;
  padding-top:10px;
}
.bredcolor{
  color:#fff;
}#menu{
   width:700px;
   text-align:center;
   height:38px;
   background:#069;
   margin:50px auto 300px auto;
   padding:3px 6px;
   border-radius:6px;
   box-shadow:0 15px 10px -15px rgba(0,0,0,0.5);
 }
#menu ul{
  margin:0;
  padding:0;
  list-style:none;
  white-space:nowrap;
  text-align:left;
  background:#069;
}
#menu ul{
  display:inline-block;
}
#menu li{
  margin:0;
  padding:0;
  list-style:none;
}#menu li{
   display:inline-block;
   display:inline;
 }
#menu ul ul{
  position:absolute;
  left:-9999px;
  opacity:0;
  padding:3px 6px;
  border-radius:6px;
  box-shadow:0 15px 10px -15px rgba(0,0,0,0.5);
  -webkit-transition<img src="static/image/smiley/default/shocked.gif" smilieid="6" border="0" alt="">pacity 1s;
  -moz-transition<img src="static/image/smiley/default/shocked.gif" smilieid="6" border="0" alt="">pacity 1s;
  -ms-transition<img src="static/image/smiley/default/shocked.gif" smilieid="6" border="0" alt="">pacity 1s;
  -o-transition<img src="static/image/smiley/default/shocked.gif" smilieid="6" border="0" alt="">pacity 1s;
  transition<img src="static/image/smiley/default/shocked.gif" smilieid="6" border="0" alt="">pacity 1s;
}
#menu ul.level1{margin:0 auto;}
#menu ul.level1 li.level1-li{
  float:left;
  display:block;
  position:relative;
}#menu a{
   display:block;
   font:normal 12px tahoma,arial,宋體b8b\4f53,sans-serif;
   color:#fff;
   line-height:30px;
   text-decoration:none;
   padding:0 20px 0 10px;
   margin:3px;
   background:#069;
   border:1px solid #09c;
   border-radius:3px;
   background-image:-webkit-gradient(linear,0 0,0 100%,color-stop(0,rgba(255,255,255,0.7)),color-stop(0.5,rgba(255,255,255,0.2)),color-stop(0.5,transparent),to(rgba(255,255,255,0.3)));
   background-image:-moz-linear-gradient(top,rgba(255,255,255,0.7) 0,rgba(255,255,255,0.2) 50%,transparent 50%,rgba(255,255,255,0.3) 100%);
   background-image:-ms-linear-gradient(top,rgba(255,255,255,0.7) 0,rgba(255,255,255,0.2) 50%,transparent 50%,rgba(255,255,255,0.3) 100%);
   background-image:-o-linear-gradient(top,rgba(255,255,255,0.7) 0,rgba(255,255,255,0.2) 50%,transparent 50%,rgba(255,255,255,0.3) 100%);
   background-image:linear-gradient(top,rgba(255,255,255,0.7) 0,rgba(255,255,255,0.2) 50%,transparent 50%,rgba(255,255,255,0.3) 100%);
   -webkit-transition:0.25s;
   -moz-transition:0.25s;
   -ms-transition:0.25s;
   -o-transition:0.25s;transition:0.25s;
 }
#menu input{
  display:none;
}
#menu label{
  display:block;
  font:normal 12px tahoma,arial,宋體b8b\4f53,sans-serif;
  color:#fff;
  line-height:30px;
  padding:0 20px 0 10px;
  margin:3px;
  position:relative;
  background:#069;
  border:1px solid #09c;
  border-radius:3px;
  background-image:-webkit-gradient(linear,0 0,0 100%,color-stop(0,rgba(255,255,255,0.7)),color-stop(0.5,rgba(255,255,255,0.2)),color-stop(0.5,transparent),to(rgba(255,255,255,0.3)));
  background-image:-moz-linear-gradient(top,rgba(255,255,255,0.7) 0,rgba(255,255,255,0.2) 50%,transparent 50%,rgba(255,255,255,0.3) 100%);
  background-image:-ms-linear-gradient(top,rgba(255,255,255,0.7) 0,rgba(255,255,255,0.2) 50%,transparent 50%,rgba(255,255,255,0.3) 100%);
  background-image:-o-linear-gradient(top,rgba(255,255,255,0.7) 0,rgba(255,255,255,0.2) 50%,transparent 50%,rgba(255,255,255,0.3) 100%);
  background-image:linear-gradient(top,rgba(255,255,255,0.7) 0,rgba(255,255,255,0.2) 50%,transparent 50%,rgba(255,255,255,0.3) 100%);
  -webkit-transition:0.25s;
  -moz-transition:0.25s;
  -ms-transition:0.25s;
  -o-transition:0.25s;
  transition:0.25s;
}
#menu label img{
  position:absolute;
  left:0;
  top:0;
  width:100%;
  height:100%;
}#menu label b{
   color:#ff0;
 }
#menu ul.level1 li.level1-li a.level1-a{float:left;}
#menu input#tab1:checked~ul.level1 ul.ul1,#menu input#tab2:checked~ul.level1 ul.ul2,#menu input#tab3:checked~ul.level1 ul.ul3{
  opacity:1;
  left:-6px;
  top:50px;
}#menu input#tab4:checked~ul.level1 ul.ul4{
   opacity:1;
   left:auto;
   right:0;
   top:50px;
 }
#menu input#tab2a:checked~ul.level1 ul.ul2,#menu input#tab2b:checked~ul.level1 ul.ul2,#menu input#tab2c:checked~ul.level1 ul.ul2,#menu input#tab2aa:checked~ul.level1 ul.ul2{
  opacity:1;
  left:-6px;
  top:50px;
}#menu input#tab2a:checked~ul.level1 ul.ul2 ul.ul2a,#menu input#tab2b:checked~ul.level1 ul.ul2 ul.ul2b,#menu input#tab2c:checked~ul.level1 ul.ul2 ul.ul2c,#menu input#tab2aa:checked~ul.level1 ul.ul2 ul.ul2a,#menu input#tab2aa:checked~ul.level1 ul.ul2 ul.ul2a ul.ul2aa{
   opacity:1;
   left:100%;
   top:auto;
   margin-top:-40px;
   margin-left:5px;
 }
#menu input#tab4a:checked~ul.level1 ul.ul4,#menu input#tab4b:checked~ul.level1 ul.ul4,#menu input#tab4aa:checked~ul.level1 ul.ul4{
  opacity:1;
  left:auto;
  right:0;
  top:50px;
}
#menu input#tab4a:checked~ul.level1 ul.ul4 ul.ul4a,#menu input#tab4b:checked~ul.level1 ul.ul4 ul.ul4b,#menu input#tab4aa:checked~ul.level1 ul.ul4 ul.ul4a,#menu input#tab4aa:checked~ul.level1 ul.ul4 ul.ul4a ul.ul4aa{
  opacity:1;
  left:auto;
  right:100%;
  top:auto;
  margin-top:-40px;
  margin-right:5px;
}
#menu li a:hover{
  border-color:#fff;
}
#menu label.close{
  position:absolute;
  width:100%;
  height:30px;
  display:none;
  padding:0;
  left:0;
  top:0;
  border:0;
  background:transparent;
}
#menu input#tab1:checked~ul.level1 label.lab1,#menu input#tab2:checked~ul.level1 label.lab2,#menu input#tab2a:checked~ul.level1 label.lab2,#menu input#tab2b:checked~ul.level1 label.lab2,#menu input#tab2c:checked~ul.level1 label.lab2,#menu input#tab2aa:checked~ul.level1 label.lab2,#menu input#tab3:checked~ul.level1 label.lab3,#menu input#tab4:checked~ul.level1 label.lab4,#menu input#tab4a:checked~ul.level1 label.lab4,#menu input#tab4b:checked~ul.level1 label.lab4,#menu input#tab4aa:checked~ul.level1 label.lab4{display:block;}
</style>
</head>
<body>
<div id="menu">
  <input type="radio" name="tab" id="tab1" class="tabs">
  <input type="radio" name="tab" id="tab2" class="tabs">
  <input type="radio" name="tab" id="tab2a" class="tabs">
  <input type="radio" name="tab" id="tab2aa" class="tabs">
  <input type="radio" name="tab" id="tab2ab" class="tabs">
  <input type="radio" name="tab" id="tab2b" class="tabs">
  <input type="radio" name="tab" id="tab2c" class="tabs">
  <input type="radio" name="tab" id="tab3" class="tabs">
  <input type="radio" name="tab" id="tab4" class="tabs">
  <input type="radio" name="tab" id="tab4a" class="tabs">
  <input type="radio" name="tab" id="tab4aa" class="tabs">
  <input type="radio" name="tab" id="tab4b" class="tabs">
  <input type="radio" name="tab" id="tabclose" class="tabs">
  <ul class="level1">
    <li class="level1-li"><a class="level1-a" href="#">首 頁</a></li>
    <li class="level1-li">
      <label for="tab1" class="open">關於我 <b>↓</b></label>
      <label for="tabclose" class="close lab1"></label>
      <ul class="ul1">
        <li><a href="#">郵 箱</a></li>
        <li><a href="#">電 話</a></li>
        <li><a href="#">地 址</a></li>
      </ul>
    </li>
    <li class="level1-li">
      <label for="tab2">度 假 <b>↓</b></label>
      <label for="tabclose" class="close lab2"></label>
      <ul class="ul2">
        <li><a href="#">度假圖片</a></li>
        <li><label for="tab2a">度假商店 <b>→</b></label>
          <ul class="ul2a">
            <li><a href="#">買東西</a></li>
            <li><a href="#">網際網路銷售</a></li>
            <li><label for="tab2aa">買東西聖地 <b>→</b></label>
              <ul class="ul2aa">
                <li><a href="#">考 驗</a></li>
                <li><a href="#">附近的</a></li>
                <li><a href="#">指導書</a></li>
                <li><a href="#">滑 板</a></li>
              </ul>
            </li>
            <li><a href="#">專家介紹</a></li>
          </ul>
        </li>
        <li><a href="#">有趣生活</a></li>
        <li><label for="tab2b">餐 廳 <b>→</b></label>
          <ul class="ul2b">
            <li><a href="#">冬季旅館</a></li>
            <li><a href="#">夏季旅館</a></li>
            <li><a href="#">秋季旅館</a></li>
            <li><a href="#">冬季旅館</a></li>
          </ul>
        </li>
        <li><label for="tab2c">篝火晚會 <b>→</b></label>
          <ul class="ul2c">
            <li><a href="#">主題晚會</a></li>
            <li><a href="#">報導晚會</a></li>
            <li><a href="#">野外晚會</a></li>
          </ul>
        </li>
      </ul>
    </li>
    <li class="level1-li">
      <label for="tab3">景區周圍環境 <b>↓</b></label>
      <label for="tabclose" class="close lab3"></label>
      <ul class="ul3">
        <li><a href="#">為什麼去那</a></li>
        <li><a href="#">我們做什麼</a></li>
        <li><a href="#">風 景</a></li>
        <li><a href="#">生活卡品</a></li>
      </ul>
    </li>
    <li class="level1-li">
      <label for="tab4">動態資訊 <b>↓</b></label>
      <label for="tabclose" class="close lab4">/label>
      <ul class="ul4">
        <li><a href="#">支付方法</a></li>
        <li><label for="tab4a"><b>←</b> 瞭解度假村</label>
          <ul class="ul4a">
            <li><a href="#">本質生活</a></li>
            <li><a href="#">保 險</a></li>
            <li><label for="tab4aa"><b>←</b> 廉價房租</label>
              <ul class="ul4aa">
                <li><a href="#">客 廳</a></li>
                <li><a href="#">臥 室</a></li>
                <li><a href="#">陽 臺</a></li>
              </ul>
            </li><li><a href="#">附近學校</a></li>
            <li><a href="#">學世界</a></li>
            <li><a href="#">附近學校</a></li>
          </ul>
        </li>
        <li><label for="tab4b"><b>←</b> 語 言</label>
          <ul class="ul4b">
            <li><a href="#">英 語</a></li>
            <li><a href="#">中 文</a></li>
            <li><a href="#">法 語</a></li>
          </ul>
        </li>
        <li><a href="#">厲害啊</a></li>
      </ul>
    </li>
    <li class="level1-li"><a class="level1-a" href="#">世界觀</a></li>
  </ul>
</div>
</body>
</html>

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CSS3實現的美觀多級下拉選單效果程式碼例項

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