152 lines
4.4 KiB
Markdown
152 lines
4.4 KiB
Markdown
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---
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title: Carousel
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localeTitle: 圆盘传送带
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---
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## 圆盘传送带
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Carousel是一个幻灯片组件，用于循环播放图像或文本幻灯片等元素。 它以平滑的方式提供了一种通过滑动或循环来表示大量数据（文本或图像）的动态方式
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图像滑块的示例代码如下：
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```html
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<html>
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<head>
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<!-- BootStrap's minified CSS version -->
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
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</head>
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<style>
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.carousel-indicators li
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{
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background-color:red;
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}
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.carousel-indicators .active
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{
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background-color:blue;
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}
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.carousel-indicators .item
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{
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height:700 px;
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width :800 px;
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}
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</style>
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<body>
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<!-- Declaring div for Carousel to appear inside it -->
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<div class="container">
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<div id="myCarousel" class="carousel slide" data-ride="carousel">
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<!-- Indicators -->
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<ol class="carousel-indicators">
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<li data-target="#myCarousel" data-slide-to="0" class="active"></li>
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<li data-target="#myCarousel" data-slide-to="1" ></li>
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<li data-target="#myCarousel" data-slide-to="2"></li>
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</ol>
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<!-- Wrapper for Slides -->
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<div class="carousel-inner">
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<div class="item active">
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<img src="http://res.cloudinary.com/dneh1l9vl/image/upload/v1506241850/Hello_bootstrap_ohtphr.png" alt="Hello_Bootstrap" >
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</div>
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<div class="item">
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<img src="http://res.cloudinary.com/dneh1l9vl/image/upload/v1506613859/devices_bootstrap_nk4zlk.jpg" alt="Device_Bootstrap" >
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</div>
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<div class="item">
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<img src="http://res.cloudinary.com/dneh1l9vl/image/upload/v1506613966/responsive_bootstrap_nzuo9l.jpg" alt="Responsive_Bootstrap">
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</div>
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</div>
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<!-- Left and Right Controls for sliding through the slides -->
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<a class="left carousel-control" href="#myCarousel" data-slide="prev">
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<span class="glyphicon glyphicon-chevron-left"></span>
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</a>
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<a class="right carousel-control" href="#myCarousel" data-slide="next">
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<span class="glyphicon glyphicon-chevron-right"></span>
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</a>
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</div>
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</div>
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<!-- Optional JavaScript -->
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<!-- jQuery first, then Popper.js, then Bootstrap JS -->
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<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>
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</body>
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</html>
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```
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理解上面示例中使用的属性和类：
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### 1）属性
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a） `data-ride` ： - `data-ride ="carousel"`允许页面加载动画开始。
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b） `data-target` ： - 它指向轮播的id
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c） `data-slide-to` ： - 它指定在单击指示器（特定点）时要移动到哪个幻灯片。
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### 2）课程
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a） `carousel` ： - `class="carousel"`指定div包含轮播。
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b） `slide` ： - 此类添加CSS过渡。
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c） `carousel-inner` ： - 这表示将保存要在幻灯片中显示的文本/图像的代码部分。
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d） `item` ： - 它指的是要在轮播中显示的内容。
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e） `left carousal-control` ： - 这增加了后退按钮，允许滑动到上一张幻灯片。
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f） `right carousal-control` ： - 这增加了下一个按钮，允许滑动到下一张幻灯片。
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g） `carousel-caption` ： - 此类允许您为每张幻灯片添加标题。
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注意：为每个项目添加`class="carousel-caption"` 。
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### 用法
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#### 1）通过数据属性
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`data-ride="carousel"`属性用于将轮播标记为从页面加载开始的动画。 `data-slide`接受关键字`prev`或`next` ，这会改变相对于当前位置的幻灯片位置。
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#### 2）通过JavaScript
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手动调用轮播：
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`$('.carousel').carousel()`
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### 选项
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选项可以通过数据属性或JavaScript传递。对于数据属性，将选项名称附加到`data-` ，如`data-interval=""` 。
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一些常用的选项是：
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* 间隔
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* 暂停
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* 骑
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* 包
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## 额外细节
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* [Bootstrap Carousel](https://getbootstrap.com/docs/4.0/components/carousel/)
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