在引导轮播轨道中循环图像

Question

我在尝试使用引导轮播显示附加到职位发布的多个图像时遇到了一些问题。这是没有carousal模板的原始代码：

<% if @job.images.attached? %>
<% (0...@job.images.count).each do |image| %>

<%= image_tag(@job.images[image]) %>

<% end %>
    <% else %>
        <%= image_tag "missing.jpg" %>

                <% end %>

下面是我在 w3 学校使用的引导轮播示例，当我在我的应用上测试它时效果很好。

<div id="demo" class="carousel slide" data-ride="carousel">

  <!-- Indicators -->
  <ul class="carousel-indicators">
    <li data-target="#demo" data-slide-to="0" class="active"></li>
    <li data-target="#demo" data-slide-to="1"></li>
    <li data-target="#demo" data-slide-to="2"></li>
  </ul>

  <!-- The slideshow -->
  <div class="carousel-inner">
    <div class="item active">
      <img src="la.jpg" alt="Los Angeles">
    </div>
    <div class="item">
      <img src="chicago.jpg" alt="Chicago">
    </div>
    <div class="item">
      <img src="ny.jpg" alt="New York">
    </div>
  </div>

  <!-- Left and right controls -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
    <span class="carousel-control-next-icon"></span>
  </a>

</div>

到目前为止我已经尝试过：

<div id="demo" class="carousel slide" data-ride="carousel">

  <!-- Indicators -->
  <ul class="carousel-indicators">
    <% (0...@job.images.count).each do |image| %>
    <li data-target="#demo" data-slide-to=#{image} class="active"></li>
    <% end %>

  </ul>

  <!-- The slideshow -->
  <div class="carousel-inner">
    <% (0...@job.images.count).each do |image| %>
    <div class="item active">
    <%= image_tag(@job.images[image]) %>
    </div>
    <% end %>
  </div>

  <!-- Left and right controls -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
    <span class="carousel-control-next-icon"></span>
  </a>

</div>

图像相互堆叠，当我单击下一张幻灯片时，所有图像都消失了。我不确定要在数据幻灯片类中放入什么，我怀疑这是导致问题。

更新

此代码在图像滑块自动播放时有效，但手动单击图像滑块会导致整个轮播消失：

<div id="demo" class="carousel slide" data-ride="carousel">

  <!-- Indicators -->
  <ul class="carousel-indicators">
    <% @job.images.each_with_index do |image, index| %>
    <li data-target="#demo" data-slide-to=#{index} <%= index == 0 ? 'class="active"' : '' %>></li>
    <% end %>
  </ul>

  <!-- The slideshow -->
  <div class="carousel-inner">
    <% @job.images.each_with_index do |image, index| %>
    <div class="item <%= index == 0 ? 'active' : '' %>">
    <%= image_tag image %>
    </div>
    <% end %>
  </div>

  <!-- Left and right controls -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
    <span class="carousel-control-next-icon"></span>
  </a>

</div>

Answer 1

首先，您似乎为幻灯片中的每张图片都赋予了active 类。其次，有更简单的方法可以遍历您的图像。

这样的事情应该可以工作：

<div id="demo" class="carousel slide" data-ride="carousel">

  <!-- Indicators -->
  <ul class="carousel-indicators">
    <% @job.images.each_with_index do |image, index| %>
    <li data-target="#demo" data-slide-to=#{index} <%= index == 0 ? 'class="active"' : '' %>></li>
    <% end %>
  </ul>

  <!-- The slideshow -->
  <div class="carousel-inner">
    <% @job.images.each_with_index do |image, index| %>
    <div class="item <%= index == 0 ? 'active' : '' %>">
    <%= image_tag image %>
    </div>
    <% end %>
  </div>

  <!-- Left and right controls -->
  <a class="carousel-control-prev" href="#demo" data-slide="prev">
    <span class="carousel-control-prev-icon"></span>
  </a>
  <a class="carousel-control-next" href="#demo" data-slide="next">
    <span class="carousel-control-next-icon"></span>
  </a>

</div>