Framework7 - 表单存储 JavaScript API

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描述

表单存储可以通过使用 JavaScript API 来实现。在这里，Framework7 在任何输入更改时调用 formToJSON，并在 pageInit 事件中调用 formFromJSON。所有表单数据都使用键存储在本地存储中。下面列出了应用程序用于管理这些包含表单数据的本地存储键的方法：

序号 类 & 描述 参数
1

myApp.formGetData(formId)

当您打开动画时，将触发此事件。

  • formId - 它是要查找的表单的 id 属性，类型为字符串。
2

myApp.formDeleteData(formId)

当动画打开完成后，将触发此事件。

  • formId - 它是要查找的表单的 id 属性，类型为字符串。
3

myApp.formStoreData(formId, formJSON)

当您关闭动画时，将触发此事件。

  • formId - 它是要查找的表单的 id 属性，类型为字符串。

  • formJSON - 要存储的 JSON 数据对象。

示例

以下示例演示了在 Framework7 中使用表单存储 JavaScript API 将数据存储到本地存储的方法：

<!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>Form storage JavaScript API</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">Form Storage API</div>
                        <div class = "right"> </div>
                     </div>
                  </div>
                  
                  <div class = "page-content">
                     <form id = "myform" class = "list-block store-data">
                        <ul>
                           <li>
                              <div class = "item-content">
                                 <div class = "item-inner">
                                    <div class = "item-title label">Name</div>
                                    <div class = "item-input">
                                       <input type = "text" name = "name" placeholder = "Enter your name">
                                    </div>
                                 </div>
                              </div>
                           </li>
                           
                           <li>
                              <div class = "item-content">
                                 <div class = "item-inner">
                                    <div class = "item-title label">E-mail</div>
                                    <div class = "item-input">
                                       <input type = "email" name = "email" placeholder = "Enter your e-mail">
                                    </div>
                                 </div>
                              </div>
                           </li>
                           
                           <li>
                              <div class = "item-content">
                                 <div class = "item-inner">
                                    <div class = "item-title label">Gender</div>
                                    <div class = "item-input">
                                       <select name = "gender">
                                          <option value = "male" selected>Male</option>
                                          <option value = "female">Female</option>
                                       </select>
                                    </div>
                                 </div>
                              </div>
                           </li>
                           
                           <li>
                              <div class = "item-content">
                                 <div class = "item-inner">
                                    <div class = "item-title label">Switch</div>
                                    <div class = "item-input">
                                       <label class = "label-switch">
                                          <input type = "checkbox" name = "switch" value = "yes" />
                                          <div class = "checkbox"></div>
                                       </label>
                                    </div>
                                 </div>
                              </div>
                           </li>
                        </ul>
                     </form>
                     
                     <div class = "content-block">
                        <p><a href = "#" class = "button button-fill button-round color-blue get-storage-data">Get Data</a></p>
                        <p><a href = "#" class = "button button-fill button-round color-red delete-storage-data">Delete Data</a></p>
                        <p><a href = "#" class = "button button-fill button-round color-green save-storage-data">Save Data</a></p>
                     </div>
                  </div>
               </div>
            </div>
         </div>
      </div>
      
      <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();
         var $$ = Dom7;

         $$('.get-storage-data').on('click', function() {
            var storedData = myApp.formGetData('myform');
            if(storedData) {
               alert(JSON.stringify(storedData));
            } else {
               alert('Yet there is no stored data for this form. Please try to change any field')
            }
         });

         $$('.delete-storage-data').on('click', function() {
            var storedData = myApp.formDeleteData('myform');
            alert('Form data is deleted')
         });

         $$('.save-storage-data').on('click', function() {
            var storedData = myApp.formStoreData('myform', {
               'name': 'William Smith',
               'email': 'williamsmith@tutorialspoint.com',
               'gender': 'male',
               'switch': ['yes'],
            });
            alert('Form data is replaced, refresh the browser to reflect the changes')
         });
      </script>
   </body>

</html>

输出

让我们执行以下步骤来了解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 forms_storage_javascript.html 文件，并将其放在服务器的根目录下。

  • 在浏览器中打开此 HTML 文件，例如 https:///forms_storage_javascript.html，输出将如下所示。

  • 当您在表单中输入详细信息并点击“获取数据”按钮时，所有字段值将转换为 JSON 格式并显示给您。

  • 当点击“保存数据”按钮时，表单数据将保存到本地存储中。

  • 当点击“删除数据”按钮时，所有表单数据将被删除。

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