jquery - 添加图像时 Bootstrap Carousel 导航消失

Question

当轮播中有一张图片时，底部的导航显示:

但是当向代码中添加第二张图片时，导航消失并且第二张图片被添加到第一张图片的底部:

这是我当前的代码，添加了第二张图片:

<div id="myCarousel" class="carousel">
    <ol class="carousel-indicators">
        <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
        <li data-target="#myCarousel" data-slide-to="1"></li>
        <li data-target="#myCarousel" data-slide-to="2"></li>
    </ol>
    <div class="carousel-inner">
        <div class="item active">
            <img src="img/colette.png" alt="Beach" class="img-responsive">
        </div>
        <!-- When adding this, nav hides and new img is shown on bottom-->
        <div class="item">
            <img src="img/apple.png" alt="apple" class="img-responsive">
        </div>
    </div>
</div>

Answer 1

查看 fiddle 上的工作演示

<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
  <!-- Indicators -->
<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>

  <!-- Wrapper for slides -->
  <div class="carousel-inner" role="listbox">
    <div class="item active">
      <img src="http://placehold.it/450x350" alt="Slide 1">
      <div class="carousel-caption">
        Caption Slide 1
      </div>
    </div>
    <div class="item">
      <img src="http://placehold.it/450x350" alt="Slide 2">
      <div class="carousel-caption">
        Caption Slide 2
      </div>
    </div>
    <div class="item">
      <img src="http://placehold.it/450x350" alt="Slide 3">
      <div class="carousel-caption">
        Caption Slide 3
      </div>
    </div>        
  </div>

</div>