Framework7 - 預載入器

描述

Framework7 中的預載入器使用可縮放向量圖形 (SVG) 並透過 CSS 進行動畫處理，使其易於調整大小。預載入器提供兩種顏色：

預設值為淺色背景
另一種為深色背景

您可以在 HTML 中使用 `preloader` 類，如下所示：

示例

以下示例演示了在 Framework7 中使用預載入器：

<!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>

輸出

讓我們執行以下步驟來檢視上述程式碼是如何工作的：

將上述 HTML 程式碼儲存為 `preloader.html` 檔案到您的伺服器根目錄。
以 `https:///preloader.html` 開啟此 HTML 檔案，輸出將顯示如下。
此程式碼顯示預載入指示器，該指示器由 SVG 製成並使用 CSS 進行動畫處理。

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