个人中心标签页导航

1. 新页面user.html,用<ul ><li role="presentation"> 实现标签页导航。
   <ul class="nav nav-tabs">
     <li role="presentation"><a href="#">Home</a></li>
     <li role="presentation"><a href="#">Profile</a></li>
     <li role="presentation"><a href="#">Messages</a></li>
   </ul>
   

   <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ username }} <br> <small>全部问答</small></h3>
           <ul class="nav nav-tabs"><li class="active"><a href="#">全部问答</a></li>
               <li><a href="#">全部评论</a></li>
               <li><a href="#">个人资料</a></li>
           </ul>

2. user.html继承base.html。
   重写title,head,main块.
   将上述<ul>放在main块中.
   定义新的块user。
   

   {% block user %}{% endblock %}

3. 让上次作业完成的个人中心页面，继承user.html，原个人中心就自动有了标签页导航。
   

   {% extends 'user.html' %}
   
   {% block user %}
       <div style="padding-left: 300px;padding-right: 300px">
           <div class="page-header">
               <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ username }} <br>
                   <small>全部问答</small>
               </h3>
               <ul class="note-list" style="padding-left: 0px;">
                   {% for foo in questions %}
                       <li class="list-group-item">
                           <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
                           <a href="#">{{ foo.author.username }}</a>
                           <br>
                           <a href="{{ url_for('detail',question_id=foo.id) }}">{{ foo.title }}</a>
                           <span class="badge">{{ foo.time }}</span>
                           <p>{{ foo.detail }}</p>
   
                       </li>
                   {% endfor %}
               </ul>
           </div>
   
           <div class="page-header">
               <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ username }}<br>
                   <small>全部评论</small>
               </h3>
               <ul class="note-list" style="padding-left: 0px;">
                   {% for foo in comments %}
                       <li class="list-group-item">
                           <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
                           <a href="#">{{ foo.author.username }}</a>
                           <span class="badge">{{ foo.time }}</span>
                           <br>
                           <p>{{ foo.detail }}</p>
   
                       </li>
                   {% endfor %}
               </ul>
   
           </div>
           <div class="page-header">
               <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ username }}<br>
                   <small>个人信息</small>
               </h3>
               <ul>
                   <li>姓名</li>
   
               </ul>
   
   
           </div>
       </div>
   {% endblock %}

4. 制作个人中心的三个子页面，重写user.html中定义的user块。
   

   {% extends 'user.html' %}
   
   {% block user %}
       <div style="padding-left: 300px;padding-right: 300px">
           <div class="page-header">
               <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ username }} <br>
                   <small>全部问答</small>
               </h3>
               <ul class="note-list" style="padding-left: 0px;">
                   {% for foo in questions %}
                       <li class="list-group-item">
                           <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
                           <a href="#">{{ foo.author.username }}</a>
                           <br>
                           <a href="{{ url_for('detail',question_id=foo.id) }}">{{ foo.title }}</a>
                           <span class="badge">{{ foo.time }}</span>
                           <p>{{ foo.detail }}</p>
   
                       </li>
                   {% endfor %}
               </ul>
           </div>
       </div>
   {% endblock %}

   usercenter2

   {% extends 'user.html' %}
   
   {% block user %}
       <div style="padding-left: 300px;padding-right: 300px">
            <div class="page-header">
               <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ username }}<br><small>全部评论</small></h3>
               <ul class="note-list" style="padding-left: 0px;">
                   {% for foo in comments %}
                       <li class="list-group-item">
                           <span class="glyphicon glyphicon-leaf" aria-hidden="true"></span>
                           <a href="#">{{ foo.author.username }}</a>
                           <span class="badge">{{ foo.time }}</span>
                           <br>
                           <p>{{ foo.detail }}</p>
   
                       </li>
                   {% endfor %}
               </ul>
   
           </div>
       </div>
   
   {% endblock %}

5. 思考 如何实现点标签页导航到达不同的个人中心子页面。