20-3 bootstrap carousel 輪播

一、架構

1. 例：http://bootstrap.ugm.com.tw/carousel.html

   
       <div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
         <!-- 指標 -->
         <ol class="carousel-indicators">
           <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
           <li data-target="#carousel-example-generic" data-slide-to="1"></li>
           <li data-target="#carousel-example-generic" data-slide-to="2"></li>
         </ol>
   
         <!-- 輪播圖片 -->
         <div class="carousel-inner" role="listbox">
           <div class="item active">
             <img src="https://unsplash.it/1920/850/?image=1" alt="...">
             <div class="carousel-caption">
               1
             </div>
           </div>
           <div class="item">
             <img src="https://unsplash.it/1920/850/?image=2" alt="...">
             <div class="carousel-caption">
               2
             </div>
           </div>
           <div class="item">
             <img src="https://unsplash.it/1920/850/?image=3" alt="...">
             <div class="carousel-caption">
               3
             </div>
           </div>
         </div>
   
         <!-- 控制 -->
         <a class="left carousel-control" href="#carousel-example-generic" role="button" data-slide="prev">
           <span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
           <span class="sr-only">Previous</span>
         </a>
         <a class="right carousel-control" href="#carousel-example-generic" role="button" data-slide="next">
           <span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
           <span class="sr-only">Next</span>
         </a>
       </div>

    

2.