具有FixedHeader扩展名的数据表，offsetTop选项可创建2个标题

时间：2015-06-19 18:08:48

标签： jquery datatables fixed-header-tables

我正在使用带有FixedHeader扩展名的DataTables。我正在使用offsetTop选项作为我的固定标题，这对于使标题位于顶部导航菜单下方非常有用。

当我滚动页面时，标题行会停在它应该停止的位置（距离页面顶部130px），但是当你滚动时，你可以简单地看到两个标题，一个粘贴到位的标题，以及原来的。

我能做些什么，以致标题不会出现两次？希望很清楚，这是在开发服务器上，所以我没有发布的链接。

1 个答案:

答案 0 :(得分：2)

除非您正确定位，否则确实会出现双标题。

我将重点介绍解决方案的重要部分。

<强> CSS：

添加了overflow:auto，因为.navbar具有20px底部边距，这将使#nav-wrapper的大小正确，以便我们稍后进行衡量。

<强> JavaScript的：

这里的技巧是调整<body>顶部填充以补偿固定标头。代码$(this).height()衡量#nav-wrapper的高度，这就是设置overflow:auto在CSS中很重要的原因。

稍后我们还需要针对FixedHeader扩展正确测量offsetTop。这里的另一个技巧是我们使用20px测量导航栏的高度，而$('#nav-wrapper .navbar').height()底部边距

。

$(document).ready(function() {
   $('body').css('padding-top', $('#nav-wrapper').height());

   var table = $('#example').DataTable();

   new $.fn.dataTable.FixedHeader( table, {
       "offsetTop": $('#nav-wrapper .navbar').height()
   });
});

<强>样本：

＆＃13;
＆＃13; 
$(document).ready(function() {
   $('body').css('padding-top', $('#nav-wrapper').height());
  
   var table = $('#example').DataTable();
 
   new $.fn.dataTable.FixedHeader( table, {
       "offsetTop": $('#nav-wrapper .navbar').height()
   });
});
＆＃13; 
#nav-wrapper {
   position: fixed;
   top: 0;
   width: 100%;
   z-index:99;
   overflow:auto;
}
＆＃13; 
<link href="http://datatables.net/release-datatables/media/css/jquery.dataTables.css" rel="stylesheet"/>
<link href="http://datatables.net/release-datatables/extensions/FixedHeader/css/dataTables.fixedHeader.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"/>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="http://datatables.net/release-datatables/media/js/jquery.dataTables.js"></script>
<script src="http://datatables.net/release-datatables/extensions/FixedHeader/js/dataTables.fixedHeader.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>

<div id="nav-wrapper">
    <nav class="navbar navbar-default">
      <div class="container-fluid">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-6" aria-expanded="false">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
          <a class="navbar-brand" href="#">Brand</a>
        </div>

        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-6">
          <ul class="nav navbar-nav">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#">Link</a></li>
            <li><a href="#">Link</a></li>
          </ul>
        </div><!-- /.navbar-collapse -->
      </div>
    </nav>
</div>

<table id="example" class="display" cellspacing="0" width="100%">
    <thead>
        <tr>
            <th>Name</th>
            <th>Position</th>
            <th>Office</th>
            <th>Age</th>
            <th>Start date</th>
            <th>Salary</th>
        </tr>
    </thead>
 
    <tfoot>
        <tr>
            <th>Name</th>
            <th>Position</th>
            <th>Office</th>
            <th>Age</th>
            <th>Start date</th>
            <th>Salary</th>
        </tr>
    </tfoot>
 
    <tbody>
        <tr>
            <td>Tiger Nixon</td>
            <td>System Architect</td>
            <td>Edinburgh</td>
            <td>61</td>
            <td>2011/04/25</td>
            <td>$320,800</td>
        </tr>
        <tr>
            <td>Garrett Winters</td>
            <td>Accountant</td>
            <td>Tokyo</td>
            <td>63</td>
            <td>2011/07/25</td>
            <td>$170,750</td>
        </tr>
        <tr>
            <td>Ashton Cox</td>
            <td>Junior Technical Author</td>
            <td>San Francisco</td>
            <td>66</td>
            <td>2009/01/12</td>
            <td>$86,000</td>
        </tr>
        <tr>
            <td>Cedric Kelly</td>
            <td>Senior Javascript Developer</td>
            <td>Edinburgh</td>
            <td>22</td>
            <td>2012/03/29</td>
            <td>$433,060</td>
        </tr>
        <tr>
            <td>Airi Satou</td>
            <td>Accountant</td>
            <td>Tokyo</td>
            <td>33</td>
            <td>2008/11/28</td>
            <td>$162,700</td>
        </tr>
        <tr>
            <td>Brielle Williamson</td>
            <td>Integration Specialist</td>
            <td>New York</td>
            <td>61</td>
            <td>2012/12/02</td>
            <td>$372,000</td>
        </tr>
        <tr>
            <td>Herrod Chandler</td>
            <td>Sales Assistant</td>
            <td>San Francisco</td>
            <td>59</td>
            <td>2012/08/06</td>
            <td>$137,500</td>
        </tr>
        <tr>
            <td>Rhona Davidson</td>
            <td>Integration Specialist</td>
            <td>Tokyo</td>
            <td>55</td>
            <td>2010/10/14</td>
            <td>$327,900</td>
        </tr>
        <tr>
            <td>Colleen Hurst</td>
            <td>Javascript Developer</td>
            <td>San Francisco</td>
            <td>39</td>
            <td>2009/09/15</td>
            <td>$205,500</td>
        </tr>
        <tr>
            <td>Sonya Frost</td>
            <td>Software Engineer</td>
            <td>Edinburgh</td>
            <td>23</td>
            <td>2008/12/13</td>
            <td>$103,600</td>
        </tr>
        <tr>
            <td>Jena Gaines</td>
            <td>Office Manager</td>
            <td>London</td>
            <td>30</td>
            <td>2008/12/19</td>
            <td>$90,560</td>
        </tr>
        <tr>
            <td>Quinn Flynn</td>
            <td>Support Lead</td>
            <td>Edinburgh</td>
            <td>22</td>
            <td>2013/03/03</td>
            <td>$342,000</td>
        </tr>
        <tr>
            <td>Charde Marshall</td>
            <td>Regional Director</td>
            <td>San Francisco</td>
            <td>36</td>
            <td>2008/10/16</td>
            <td>$470,600</td>
        </tr>
        <tr>
            <td>Haley Kennedy</td>
            <td>Senior Marketing Designer</td>
            <td>London</td>
            <td>43</td>
            <td>2012/12/18</td>
            <td>$313,500</td>
        </tr>
        <tr>
            <td>Tatyana Fitzpatrick</td>
            <td>Regional Director</td>
            <td>London</td>
            <td>19</td>
            <td>2010/03/17</td>
            <td>$385,750</td>
        </tr>
        <tr>
            <td>Michael Silva</td>
            <td>Marketing Designer</td>
            <td>London</td>
            <td>66</td>
            <td>2012/11/27</td>
            <td>$198,500</td>
        </tr>
        <tr>
            <td>Paul Byrd</td>
            <td>Chief Financial Officer (CFO)</td>
            <td>New York</td>
            <td>64</td>
            <td>2010/06/09</td>
            <td>$725,000</td>
        </tr>
        <tr>
            <td>Gloria Little</td>
            <td>Systems Administrator</td>
            <td>New York</td>
            <td>59</td>
            <td>2009/04/10</td>
            <td>$237,500</td>
        </tr>
        <tr>
            <td>Bradley Greer</td>
            <td>Software Engineer</td>
            <td>London</td>
            <td>41</td>
            <td>2012/10/13</td>
            <td>$132,000</td>
        </tr>
        <tr>
            <td>Dai Rios</td>
            <td>Personnel Lead</td>
            <td>Edinburgh</td>
            <td>35</td>
            <td>2012/09/26</td>
            <td>$217,500</td>
        </tr>
        <tr>
            <td>Jenette Caldwell</td>
            <td>Development Lead</td>
            <td>New York</td>
            <td>30</td>
            <td>2011/09/03</td>
            <td>$345,000</td>
        </tr>
        <tr>
            <td>Yuri Berry</td>
            <td>Chief Marketing Officer (CMO)</td>
            <td>New York</td>
            <td>40</td>
            <td>2009/06/25</td>
            <td>$675,000</td>
        </tr>
        <tr>
            <td>Caesar Vance</td>
            <td>Pre-Sales Support</td>
            <td>New York</td>
            <td>21</td>
            <td>2011/12/12</td>
            <td>$106,450</td>
        </tr>
        <tr>
            <td>Doris Wilder</td>
            <td>Sales Assistant</td>
            <td>Sidney</td>
            <td>23</td>
            <td>2010/09/20</td>
            <td>$85,600</td>
        </tr>
        <tr>
            <td>Angelica Ramos</td>
            <td>Chief Executive Officer (CEO)</td>
            <td>London</td>
            <td>47</td>
            <td>2009/10/09</td>
            <td>$1,200,000</td>
        </tr>
        <tr>
            <td>Gavin Joyce</td>
            <td>Developer</td>
            <td>Edinburgh</td>
            <td>42</td>
            <td>2010/12/22</td>
            <td>$92,575</td>
        </tr>
        <tr>
            <td>Jennifer Chang</td>
            <td>Regional Director</td>
            <td>Singapore</td>
            <td>28</td>
            <td>2010/11/14</td>
            <td>$357,650</td>
        </tr>
        <tr>
            <td>Brenden Wagner</td>
            <td>Software Engineer</td>
            <td>San Francisco</td>
            <td>28</td>
            <td>2011/06/07</td>
            <td>$206,850</td>
        </tr>
        <tr>
            <td>Fiona Green</td>
            <td>Chief Operating Officer (COO)</td>
            <td>San Francisco</td>
            <td>48</td>
            <td>2010/03/11</td>
            <td>$850,000</td>
        </tr>
        <tr>
            <td>Shou Itou</td>
            <td>Regional Marketing</td>
            <td>Tokyo</td>
            <td>20</td>
            <td>2011/08/14</td>
            <td>$163,000</td>
        </tr>
        <tr>
            <td>Michelle House</td>
            <td>Integration Specialist</td>
            <td>Sidney</td>
            <td>37</td>
            <td>2011/06/02</td>
            <td>$95,400</td>
        </tr>
        <tr>
            <td>Suki Burks</td>
            <td>Developer</td>
            <td>London</td>
            <td>53</td>
            <td>2009/10/22</td>
            <td>$114,500</td>
        </tr>
        <tr>
            <td>Prescott Bartlett</td>
            <td>Technical Author</td>
            <td>London</td>
            <td>27</td>
            <td>2011/05/07</td>
            <td>$145,000</td>
        </tr>
        <tr>
            <td>Gavin Cortez</td>
            <td>Team Leader</td>
            <td>San Francisco</td>
            <td>22</td>
            <td>2008/10/26</td>
            <td>$235,500</td>
        </tr>
        <tr>
            <td>Martena Mccray</td>
            <td>Post-Sales support</td>
            <td>Edinburgh</td>
            <td>46</td>
            <td>2011/03/09</td>
            <td>$324,050</td>
        </tr>
        <tr>
            <td>Unity Butler</td>
            <td>Marketing Designer</td>
            <td>San Francisco</td>
            <td>47</td>
            <td>2009/12/09</td>
            <td>$85,675</td>
        </tr>
        <tr>
            <td>Howard Hatfield</td>
            <td>Office Manager</td>
            <td>San Francisco</td>
            <td>51</td>
            <td>2008/12/16</td>
            <td>$164,500</td>
        </tr>
        <tr>
            <td>Hope Fuentes</td>
            <td>Secretary</td>
            <td>San Francisco</td>
            <td>41</td>
            <td>2010/02/12</td>
            <td>$109,850</td>
        </tr>
        <tr>
            <td>Vivian Harrell</td>
            <td>Financial Controller</td>
            <td>San Francisco</td>
            <td>62</td>
            <td>2009/02/14</td>
            <td>$452,500</td>
        </tr>
        <tr>
            <td>Timothy Mooney</td>
            <td>Office Manager</td>
            <td>London</td>
            <td>37</td>
            <td>2008/12/11</td>
            <td>$136,200</td>
        </tr>
        <tr>
            <td>Jackson Bradshaw</td>
            <td>Director</td>
            <td>New York</td>
            <td>65</td>
            <td>2008/09/26</td>
            <td>$645,750</td>
        </tr>
        <tr>
            <td>Olivia Liang</td>
            <td>Support Engineer</td>
            <td>Singapore</td>
            <td>64</td>
            <td>2011/02/03</td>
            <td>$234,500</td>
        </tr>
        <tr>
            <td>Bruno Nash</td>
            <td>Software Engineer</td>
            <td>London</td>
            <td>38</td>
            <td>2011/05/03</td>
            <td>$163,500</td>
        </tr>
        <tr>
            <td>Sakura Yamamoto</td>
            <td>Support Engineer</td>
            <td>Tokyo</td>
            <td>37</td>
            <td>2009/08/19</td>
            <td>$139,575</td>
        </tr>
        <tr>
            <td>Thor Walton</td>
            <td>Developer</td>
            <td>New York</td>
            <td>61</td>
            <td>2013/08/11</td>
            <td>$98,540</td>
        </tr>
        <tr>
            <td>Finn Camacho</td>
            <td>Support Engineer</td>
            <td>San Francisco</td>
            <td>47</td>
            <td>2009/07/07</td>
            <td>$87,500</td>
        </tr>
        <tr>
            <td>Serge Baldwin</td>
            <td>Data Coordinator</td>
            <td>Singapore</td>
            <td>64</td>
            <td>2012/04/09</td>
            <td>$138,575</td>
        </tr>
        <tr>
            <td>Zenaida Frank</td>
            <td>Software Engineer</td>
            <td>New York</td>
            <td>63</td>
            <td>2010/01/04</td>
            <td>$125,250</td>
        </tr>
        <tr>
            <td>Zorita Serrano</td>
            <td>Software Engineer</td>
            <td>San Francisco</td>
            <td>56</td>
            <td>2012/06/01</td>
            <td>$115,000</td>
        </tr>
        <tr>
            <td>Jennifer Acosta</td>
            <td>Junior Javascript Developer</td>
            <td>Edinburgh</td>
            <td>43</td>
            <td>2013/02/01</td>
            <td>$75,650</td>
        </tr>
        <tr>
            <td>Cara Stevens</td>
            <td>Sales Assistant</td>
            <td>New York</td>
            <td>46</td>
            <td>2011/12/06</td>
            <td>$145,600</td>
        </tr>
        <tr>
            <td>Hermione Butler</td>
            <td>Regional Director</td>
            <td>London</td>
            <td>47</td>
            <td>2011/03/21</td>
            <td>$356,250</td>
        </tr>
        <tr>
            <td>Lael Greer</td>
            <td>Systems Administrator</td>
            <td>London</td>
            <td>21</td>
            <td>2009/02/27</td>
            <td>$103,500</td>
        </tr>
        <tr>
            <td>Jonas Alexander</td>
            <td>Developer</td>
            <td>San Francisco</td>
            <td>30</td>
            <td>2010/07/14</td>
            <td>$86,500</td>
        </tr>
        <tr>
            <td>Shad Decker</td>
            <td>Regional Director</td>
            <td>Edinburgh</td>
            <td>51</td>
            <td>2008/11/13</td>
            <td>$183,000</td>
        </tr>
        <tr>
            <td>Michael Bruce</td>
            <td>Javascript Developer</td>
            <td>Singapore</td>
            <td>29</td>
            <td>2011/06/27</td>
            <td>$183,000</td>
        </tr>
        <tr>
            <td>Donna Snider</td>
            <td>Customer Support</td>
            <td>New York</td>
            <td>27</td>
            <td>2011/01/25</td>
            <td>$112,000</td>
        </tr>
    </tbody>
</table>
＆＃13;
＆＃13;
＆＃13;

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