Framework7 - 预加载器

描述

Framework7 中的预加载器使用可缩放矢量图形 (SVG) 并通过 CSS 进行动画处理，使其易于调整大小。预加载器提供两种颜色：

默认值为浅色背景
另一种为深色背景

您可以在 HTML 中使用 `preloader` 类，如下所示：

示例

以下示例演示了在 Framework7 中使用预加载器：

<!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

让我们执行以下步骤来查看上述代码是如何工作的：

将上述 HTML 代码保存为 `preloader.html` 文件到您的服务器根目录。
以 `https:///preloader.html` 打开此 HTML 文件，输出将显示如下。
此代码显示预加载指示器，该指示器由 SVG 制成并使用 CSS 进行动画处理。

打印页面