Bootstrap NavBar漢堡菜單在移動設備上不起作用

Question

當我在Mac上縮小窗口時，會出現漢堡菜單，但在移動設備上卻沒有。 導航欄變得非常無格式。 任何幫助將不勝感激。 謝謝！

    <nav class="navbar navbar-inverse">
  <div class="container">
    <div class = "row">
      <div class="navbar-header">
        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
          <span class="sr-only">Toggle navigation</span>
          <span class="icon-bar"></span>
        </button>
      </div>
      <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
        <ul class="nav navbar-nav">
          <li><%= link_to "HomePage", listings_path %></li>
          <li><%= link_to "Reviews", reviews_path %> </li>
          <li><%= link_to "My Personal Listings", mylistings_path %></li>
          <li class="dropdown">
            <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Admin<span class="caret"></span></a>
              <ul class="dropdown-menu">
                <%if user_signed_in? && current_user.admin? %>
                  <li><%= link_to "Admin Page", users_path %></li>
                  <li><%= link_to "Add a Personal Listing", new_mylisting_path %></li>
                <%end%>
              </ul>
            </li>
              <li class="dropdown">
                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Your Account <span class="caret"></span></a>
                  <ul class="dropdown-menu">
                    <li><%= link_to 'Sign In', new_user_session_path %></li>
                    <li><%= link_to 'Sign Up', new_user_registration_path %></li>
                    <li><%= link_to('Sign Out', destroy_user_session_path, :method => :delete) %></li>
                  </ul>
                </li>
                <li class="dropdown">
                  <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Additional Resources<span class="caret"></span></a>
                  <ul class="dropdown-menu">
                    <li><%= link_to 'Zillow', "http://www.zillow.com/", :target => "_blank"%></li>
                    <li><%= link_to 'Realtor.com', "https://www.realtor.com/", :target => "_blank"%></li>
                    <li><%= link_to "Multiple Listing Service", "http://www.mls.com/", :target => "_blank"%></li>
                    <li><%= link_to 'Trulia', "https://www.trulia.com/", :target => "_blank"%></li>
                    <li><%= link_to 'Redfin', "https://www.redfin.com/", :target => "_blank"%></li>
                    </ul>
                    </li>
                  </ul>
          </div>
        </div>
      </div>
  </nav>

Answer 1

工作正常。 您沒有添加后兩個圖標欄。 請參見下面的代碼段或codepen 。

 <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script> <nav class="navbar navbar-inverse"> <div class="container"> <div class = "row"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> </div> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> <ul class="nav navbar-nav"> <li><%= link_to "HomePage", listings_path %></li> <li><%= link_to "Reviews", reviews_path %> </li> <li><%= link_to "My Personal Listings", mylistings_path %></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Admin<span class="caret"></span></a> <ul class="dropdown-menu"> <%if user_signed_in? && current_user.admin? %> <li><%= link_to "Admin Page", users_path %></li> <li><%= link_to "Add a Personal Listing", new_mylisting_path %></li> <%end%> </ul> </li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Your Account <span class="caret"></span></a> <ul class="dropdown-menu"> <li><%= link_to 'Sign In', new_user_session_path %></li> <li><%= link_to 'Sign Up', new_user_registration_path %></li> <li><%= link_to('Sign Out', destroy_user_session_path, :method => :delete) %></li> </ul> </li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Additional Resources<span class="caret"></span></a> <ul class="dropdown-menu"> <li><%= link_to 'Zillow', "http://www.zillow.com/", :target => "_blank"%></li> <li><%= link_to 'Realtor.com', "https://www.realtor.com/", :target => "_blank"%></li> <li><%= link_to "Multiple Listing Service", "http://www.mls.com/", :target => "_blank"%></li> <li><%= link_to 'Trulia', "https://www.trulia.com/", :target => "_blank"%></li> <li><%= link_to 'Redfin', "https://www.redfin.com/", :target => "_blank"%></li> </ul> </li> </ul> </div> </div> </div> </nav>