Framework7 - 预加载器( Preloaders)
描述 (Description)
Framework7中的预加载器由可缩放矢量图形（SVG）制成，并使用CSS动画，这使其易于调整大小。 预加载器有两种颜色 -
- 默认为浅色背景
- 另一个是黑暗的背景
您可以在HTML中使用preloader类，如下所示 -
例子 (Example)
以下示例演示了Framework7中预加载器的使用 -
<!DOCTYPE html>
<html>
<head>
<meta name = "viewport" content = "width = device-width, initial-scale = 1,
maximum-scale = 1, minimum-scale = 1, user-scalable = no, minimal-ui" />
<meta name = "apple-mobile-web-app-capable" content = "yes" />
<meta name = "apple-mobile-web-app-status-bar-style" content = "black" />
<title>Panel Events</title>
<link rel = "stylesheet"
href = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/css/framework7.ios.min.css" />
<link rel = "stylesheet"
href = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/css/framework7.ios.colors.min.css" />
</head>
<body>
<div class = "views">
<div class = "view view-main">
<div class = "pages">
<div data-page = "home" class = "page navbar-fixed">
<div class = "navbar">
<div class = "navbar-inner">
<div class = "left"> </div>
<div class = "center">Framework7 Preloader</div>
<div class = "right"> </div>
</div>
</div>
<div class = "page-content">
<div class = "content-block row">
<div class = "col-25"><span class = "preloader"></span><br>Default Preloader</div>
<div class = "col-25 col-dark"><span class = "preloader preloader-white"></span><br>White Preloader</div>
<div class = "col-25"><span style = "width:42px; height:42px" class = "preloader"></span><br>Big Preloader</div>
<div class = "col-25 col-dark"><span style = "width:42px; height:42px" class = "preloader preloader-white"></span><br>White Preloader</div>
</div>
</div>
</div>
</div>
</div>
</div>
<style>.col-25{padding:5px;text-align:center;}.col-dark{background:#222;}</style>
<script type = "text/javascript"
src = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/js/framework7.min.js"></script>
<script>
var myApp = new Framework7();
</script>
</body>
</html>
输出 (Output)
让我们执行以下步骤，看看上面给出的代码是如何工作的 -
将上面给出的HTML代码保存为服务器根文件夹中的preloader.html文件。
以http://localhost/preloader.html打开此HTML文件，输出显示如下。
此代码显示预加载器指示器，该指示器由SVG制作并使用CSS进行动画处理。
