jQuery移动选项值

jQuery Mobile Option Value

本文关键字:选项 移动 jQuery      更新时间:2023-09-26

我已经实现了选项值作为下拉菜单导航。我的问题是,当我从页面A更改到页面B,我希望页面B处于活动状态,我希望它是在下拉菜单和其他方式可见的主要选项。请看下面的代码:

<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.2/jquery.mobile-1.4.2.min.css" />
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://code.jquery.com/mobile/1.4.2/jquery.mobile-1.4.2.min.js"></script>
</head>
<body>
<!-- Start of index page -->
    <div data-role="page" data-theme="b" id="page_a">
        <div data-role="header" data-position="inline">
            <h1>A</h1>
        </div><!-- /header -->
<div class="ui-field-contain">
    <label for="select-custom-1"></label>
    <select name="select-custom-1" id="select-custom-1" data-native-menu="false">
        <option value="#page_a">Page A</option>
        <option value="#page_b">Page B</option>
    </select>
    <script>
    $(function(){
      // bind change event to select
      $('#select-custom-1').bind('change', function () {
          var url = $(this).val(); // get selected value
          if (url) { // require a URL
              $.mobile.changePage( url, { transition: "slide", changeHash: false });
          }
          return false;
      });
    });
</script>
</div>
        <div data-role="content" data-theme="b">
        <p>Page A</p>
        </div><!-- /content -->
        <div data-role="footer" data-theme="b">
        </div><!-- /footer -->
    </div><!-- /index page -->
<!-- Start of about page -->
    <div data-role="page" data-theme="b" id="page_b">
        <div data-role="header" data-position="inline">
            <h1>B</h1>
        </div><!-- /header -->
<div class="ui-field-contain">
    <label for="select-custom-2"></label>
    <select name="select-custom-2" id="select-custom-2" data-native-menu="false">
          <option value="#page_a">Page A</option>
        <option value="#page_b">Page B</option>
    </select>
    <script>
    $(function(){
      // bind change event to select
      $('#select-custom-2').bind('change', function () {
          var url = $(this).val(); // get selected value
          if (url) { // require a URL
              $.mobile.changePage( url, { transition: "slide", changeHash: false });
          }
          return false;
      });
    });
</script>
</div>
        <div data-role="content" data-theme="b">
        <p>Page B</p>
        </div><!-- /content -->
        <div data-role="footer" data-theme="b">
        </div><!-- /footer -->
    </div><!-- /about page -->

</body>
</html>

首先,在每个页面上将选中的属性添加到与页面匹配的选项中,并将相同的类名分配给所有页面上的所有导航选择(在我的示例中为class="navSelect")。在a页:

<select name="select-custom-1" id="select-custom-1" data-native-menu="false" class="navSelect">
    <option value="#page_a" selected="selected">Page A</option>
    <option value="#page_b">Page B</option>
</select>

和b页:

<select name="select-custom-2" id="select-custom-2" data-native-menu="false" class="navSelect">
    <option value="#page_a">Page A</option>
    <option value="#page_b" selected="selected">Page B</option>
</select>

现在从页面中删除脚本,并在页面底部的类名上使用一个更改处理程序:

$(document).on("change", ".navSelect", function (e) {
    var url = $(this).val(); // get selected value
    var curPage = $("body").pagecontainer( "getActivePage" );
    //reset this select to the current page
    $(this).val("#" + curPage.prop("id")).selectmenu( "refresh", true );
    if (url) { // require a URL
        $.mobile.changePage(url, {
            transition: "slide",
            changeHash: false
        });
    }
});

脚本会像原来那样更改页面,但它也会将选择重置为当前页面id,因此当您返回到页面时,它会显示正确的值。还请注意,在jQM中,当更新底层选择时,必须在小部件上调用.selectmenu("refresh", true)。

这是一个DEMO