jquery - 如何获得基于 Bootstrap 的菜单栏以匹配 WP 上当前 slider 图像的颜色？

标签 jquery css twitter-bootstrap wordpress-theming

我想知道是否有人可以建议我在特定情况下我可能想做什么。我有一个客户来回询问基于 Twitter Bootstrap 的 WordPress 主题。该主题在首页上有一个 slider 轮播。一张幻灯片的背景为绿色，另一张为橙色，另一张为红色。客户向我展示了一个 slider 在顶部导航栏旁边运行的站点。当当前幻灯片为绿色背景时，顶部导航栏为绿色以匹配......与橙色和红色类似。因此，当幻灯片更改为具有橙色背景的图像时，顶部导航栏会更改为具有相同颜色的背景。

我尝试使用 CSS3 动画与 slider 同步，方法是将动画设置为 5 秒后更改，就像 slider 每 5 秒更改一次一样。结果不是很好。我想问题是 CSS3 颜色动画不会直接从一种颜色变为另一种颜色，而是动画过渡，在过渡期间经历各种中间颜色。

将导航栏放在旋转木马中似乎不起作用。我希望这能帮助我将导航栏背景颜色样式与 slider 同步，应用一个新的样式类，CSS 可以将其作为目标来更改导航栏背景。这根本不是一个好的解决方案。根据我放置导航栏代码的位置，它可能根本不会显示或肯定出现在错误的位置。

因此，也许使用 JQuery 我可以找出当前显示的幻灯片并使用它来更改导航栏上的类以显示不同的导航栏背景。或者我可以只使用一个计时器在不同时间添加不同的类，然后使用它在不同时间更改导航栏背景的颜色，例如每 5 秒。 在此先感谢您的帮助， 布鲁斯

最佳答案

将导航栏放在 slider 顶部然后使导航栏透明并更改导航栏内链接上的 css 会容易得多。

enter image description here

演示:http://jsbin.com/wevini/1/

HTML

<!-- NAVBAR
================================================== -->
  <body>
    <div class="navbar-wrapper">
      <div class="container">

        <div class="navbar navbar-inverse navbar-transparent navbar-static-top" role="navigation">
          <div class="container">
            <div class="navbar-header">
              <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".navbar-collapse">
                <span class="sr-only">Toggle navigation</span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
              </button>
              <a class="navbar-brand" href="#">Project name</a>
            </div>
            <div class="navbar-collapse collapse">
              <ul class="nav navbar-nav">
                <li class="active"><a href="#">Home</a></li>
                <li><a href="#about">About</a></li>
                <li><a href="#contact">Contact</a></li>
                <li class="dropdown">
                  <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <span class="caret"></span></a>
                  <ul class="dropdown-menu" role="menu">
                    <li><a href="#">Action</a></li>
                    <li><a href="#">Another action</a></li>
                    <li><a href="#">Something else here</a></li>
                    <li class="divider"></li>
                    <li class="dropdown-header">Nav header</li>
                    <li><a href="#">Separated link</a></li>
                    <li><a href="#">One more separated link</a></li>
                  </ul>
                </li>
              </ul>
            </div>
          </div>
        </div>

      </div>
    </div>


    <!-- Carousel
    ================================================== -->
    <div id="myCarousel" class="carousel slide" data-ride="carousel">
      <!-- Indicators -->
      <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 item-1">

          <div class="container">
            <div class="carousel-caption">
              <h1>Example headline.</h1>
              <p>Note: If you're viewing this page via a <code>file://</code> URL, the "next" and "previous" Glyphicon buttons on the left and right might not load/display properly due to web browser security rules.</p>
              <p><a class="btn btn-lg btn-primary" href="#" role="button">Sign up today</a></p>
            </div>
          </div>
        </div>
        <div class="item item-2">

          <div class="container">
            <div class="carousel-caption">
              <h1>Another example headline.</h1>
              <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
              <p><a class="btn btn-lg btn-primary" href="#" role="button">Learn more</a></p>
            </div>
          </div>
        </div>
        <div class="item item-3">

          <div class="container">
            <div class="carousel-caption">
              <h1>One more for good measure.</h1>
              <p>Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.</p>
              <p><a class="btn btn-lg btn-primary" href="#" role="button">Browse gallery</a></p>
            </div>
          </div>
        </div>
      </div>
      <a class="left carousel-control" href="#myCarousel" role="button" data-slide="prev"><span class="glyphicon glyphicon-chevron-left"></span></a>
      <a class="right carousel-control" href="#myCarousel" role="button" data-slide="next"><span class="glyphicon glyphicon-chevron-right"></span></a>
    </div><!-- /.carousel -->



    <!-- Marketing messaging and featurettes
    ================================================== -->
    <!-- Wrap the rest of the page in another container to center all the content. -->

    <div class="container marketing">

      <!-- Three columns of text below the carousel -->
      <div class="row">
        <div class="col-lg-4">
          <img class="img-circle" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="Generic placeholder image" style="width: 140px; height: 140px;">
          <h2>Heading</h2>
          <p>Donec sed odio dui. Etiam porta sem malesuada magna mollis euismod. Nullam id dolor id nibh ultricies vehicula ut id elit. Morbi leo risus, porta ac consectetur ac, vestibulum at eros. Praesent commodo cursus magna.</p>
          <p><a class="btn btn-default" href="#" role="button">View details &raquo;</a></p>
        </div><!-- /.col-lg-4 -->
        <div class="col-lg-4">
          <img class="img-circle" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="Generic placeholder image" style="width: 140px; height: 140px;">
          <h2>Heading</h2>
          <p>Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh.</p>
          <p><a class="btn btn-default" href="#" role="button">View details &raquo;</a></p>
        </div><!-- /.col-lg-4 -->
        <div class="col-lg-4">
          <img class="img-circle" src="data:image/gif;base64,R0lGODlhAQABAIAAAHd3dwAAACH5BAAAAAAALAAAAAABAAEAAAICRAEAOw==" alt="Generic placeholder image" style="width: 140px; height: 140px;">
          <h2>Heading</h2>
          <p>Donec sed odio dui. Cras justo odio, dapibus ac facilisis in, egestas eget quam. Vestibulum id ligula porta felis euismod semper. Fusce dapibus, tellus ac cursus commodo, tortor mauris condimentum nibh, ut fermentum massa justo sit amet risus.</p>
          <p><a class="btn btn-default" href="#" role="button">View details &raquo;</a></p>
        </div><!-- /.col-lg-4 -->
      </div><!-- /.row -->


      <!-- START THE FEATURETTES -->

      <hr class="featurette-divider">

      <div class="row featurette">
        <div class="col-md-7">
          <h2 class="featurette-heading">First featurette heading. <span class="text-muted">It'll blow your mind.</span></h2>
          <p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
        </div>
        <div class="col-md-5">
          <img class="featurette-image img-responsive" data-src="holder.js/500x500/auto" alt="Generic placeholder image">
        </div>
      </div>

      <hr class="featurette-divider">

      <div class="row featurette">
        <div class="col-md-5">
          <img class="featurette-image img-responsive" data-src="holder.js/500x500/auto" alt="Generic placeholder image">
        </div>
        <div class="col-md-7">
          <h2 class="featurette-heading">Oh yeah, it's that good. <span class="text-muted">See for yourself.</span></h2>
          <p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
        </div>
      </div>

      <hr class="featurette-divider">

      <div class="row featurette">
        <div class="col-md-7">
          <h2 class="featurette-heading">And lastly, this one. <span class="text-muted">Checkmate.</span></h2>
          <p class="lead">Donec ullamcorper nulla non metus auctor fringilla. Vestibulum id ligula porta felis euismod semper. Praesent commodo cursus magna, vel scelerisque nisl consectetur. Fusce dapibus, tellus ac cursus commodo.</p>
        </div>
        <div class="col-md-5">
          <img class="featurette-image img-responsive" data-src="holder.js/500x500/auto" alt="Generic placeholder image">
        </div>
      </div>

      <hr class="featurette-divider">

      <!-- /END THE FEATURETTES -->


      <!-- FOOTER -->
      <footer>
        <p class="pull-right"><a href="#">Back to top</a></p>
        <p>&copy; 2014 Company, Inc. &middot; <a href="#">Privacy</a> &middot; <a href="#">Terms</a></p>
      </footer>

    </div><!-- /.container -->

CSS

/* GLOBAL STYLES
-------------------------------------------------- */
/* Padding below the footer and lighter body text */

body {
  padding-bottom: 40px;
  color: #5a5a5a;
}


@media (min-width:768px) { 
    .navbar-transparent {
        background: transparent;
        border: none;
        color: #fff;
    }
    .navbar-transparent .nav.navbar-nav > li > a {
        color: #fff
    }
    .navbar-transparent .nav.navbar-nav li.active > a {
        background: transparent
    }
    .navbar-transparent .navbar-brand {
        color: #fff
    }
}
.item-1 {
    background: red
}
.item-2 {
    background: purple
}
.item-3 {
    background: blue
}


/* CUSTOMIZE THE NAVBAR
-------------------------------------------------- */

/* Special class on .container surrounding .navbar, used for positioning it into place. */
.navbar-wrapper {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 20;
}

/* Flip around the padding for proper display in narrow viewports */
.navbar-wrapper > .container {
  padding-right: 0;
  padding-left: 0;
}
.navbar-wrapper .navbar {
  padding-right: 15px;
  padding-left: 15px;
}
.navbar-wrapper .navbar .container {
  width: auto;
}


/* CUSTOMIZE THE CAROUSEL
-------------------------------------------------- */

/* Carousel base class */
.carousel {
  height: 500px;
  margin-bottom: 60px;
}
/* Since positioning the image, we need to help out the caption */
.carousel-caption {
  z-index: 10;
}

/* Declare heights because of positioning of img element */
.carousel .item {
  height: 500px;
}
.carousel-inner > .item > img {
  position: absolute;
  top: 0;
  left: 0;
  min-width: 100%;
  height: 500px;
}



/* MARKETING CONTENT
-------------------------------------------------- */

/* Center align the text within the three columns below the carousel */
.marketing .col-lg-4 {
  margin-bottom: 20px;
  text-align: center;
}
.marketing h2 {
  font-weight: normal;
}
.marketing .col-lg-4 p {
  margin-right: 10px;
  margin-left: 10px;
}


/* Featurettes
------------------------- */

.featurette-divider {
  margin: 80px 0; /* Space out the Bootstrap <hr> more */
}

/* Thin out the marketing headings */
.featurette-heading {
  font-weight: 300;
  line-height: 1;
  letter-spacing: -1px;
}



/* RESPONSIVE CSS
-------------------------------------------------- */

@media (min-width: 768px) {

  /* Navbar positioning foo */
  .navbar-wrapper {
    margin-top: 20px;
  }
  .navbar-wrapper .container {
    padding-right: 15px;
    padding-left: 15px;
  }
  .navbar-wrapper .navbar {
    padding-right: 0;
    padding-left: 0;
  }

  /* The navbar becomes detached from the top, so we round the corners */
  .navbar-wrapper .navbar {
    border-radius: 4px;
  }

  /* Bump up size of carousel content */
  .carousel-caption p {
    margin-bottom: 20px;
    font-size: 21px;
    line-height: 1.4;
  }

  .featurette-heading {
    font-size: 50px;
  }
}

@media (min-width: 992px) {
  .featurette-heading {
    margin-top: 120px;
  }
}

关于jquery - 如何获得基于 Bootstrap 的菜单栏以匹配 WP 上当前 slider 图像的颜色？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26247348/

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