个人中心标签页导航

1. 新页面userbase.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>
   
   
2. 让userbase.html继承base.html。
   重写title,head,main块.
   将上述<ul>的样式放在head块，<ul>放在main块中.
   定义新的块user。
   
   
3. 让上次作业完成的个人中心页面，继承userbase.html，原个人中心就自动有了标签页导航。
   

   {% extends "base.html" %}
   {% block title %}个人中心{% endblock %}
   
   {% block head %}
       <style>
           .nav_ul li{
               list-style:none;
               float:left;
               margin: 20px;
           }
       </style>
   {% endblock %}
   
   {% block main %}
       <ul class="nav_ul">
           <li role="presentation"><a href="{{ url_for('usercenter1',user_id=user.id) }}">所有问答</a></li>
           <li role="presentation"><a href="{{ url_for('usercenter2',user_id=user.id) }}">所有评论</a></li>
           <li role="presentation"><a href="{{ url_for('usercenter3',user_id=user.id) }}">个人资料</a></li>
       </ul>
   
       {% block user %}{% endblock %}
   
   {% endblock %}

    

4. 制作个人中心的三个子页面，重写userbase.html中定义的user块，分别用于显示问答、评论、个人信息。
   

   {% extends "userbase.html" %}
   
   {% block user %}
       <div class="page-header">
           <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ username }}<br>
               <small>全部问答<span class="badge"></span></small>
           </h3>
           <ul class="list-group" style="margin: 10px">
               {% for foo in question %}
                   <li class="list-group-item">
                       <span class="glyphicon glyphicon-heart-empty" aria-hidden="true"></span>
                       <a href="#">{{ foo.author.username }}</a>
                       <span class="badge">{{ foo.creat_time }}</span>
                       <p>{{ foo.detail }}</p>
                   </li>
               {% endfor %}
           </ul>
       </div>
   {% endblock %}

   {% extends "userbase.html" %}
   
   {% block user %}
       <div class="page-header">
           <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ user }}<br>
               <small>全部评论<span class="badge"></span></small>
           </h3>
           <ul class="list-group" style="margin: 10px">
               {% for foo in comments %}
                   <li class="list-group-item">
                       <span class="glyphicon glyphicon-heart-empty" aria-hidden="true"></span>
                       <a href="#">{{ foo.author.username }}</a>
                       <span class="badge">{{ foo.creat_time }}</span>
                       <p>{{ foo.detail }}</p>
                   </li>
               {% endfor %}
           </ul>
       </div>
   {% endblock %}

   {% extends "userbase.html" %}
   
   {% block user %}
       <div class="page-header">
           <h3><span class="glyphicon glyphicon-user" aria-hidden="true"></span>{{ user }}<br>
               <small>个人信息<span class="badge"></span></small>
           </h3>
           <ul class="list-group" style="margin: 10px">
                   <li class="list-group-item">用户：{{ username }}</li>
                   <li class="list-group-item">编号：</li>
                   <li class="list-group-item">昵称：</li>
                   <li class="list-group-item">文章数：</li>
           </ul>
       </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。