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。
   
   
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。
   
   
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。

   @app.route('/usercenter/<user_id>')
   @loginFirst
   def usercenter(user_id):
       user=User.query.filter(User.id==user_id).first()
       context={
           'user': user,
           'username':user.username,
           'question':user.question,
           'comments':user.comments
       }
       return render_template('userbase.html', **context)

   {% extends 'shouye.html' %}
   {% block title %}个人中心{% endblock %}
   {% block head %}
   
   <style>
           .nav_ul li {
               list-style:none;
               float:left;
               margin:10px;
               border-bottom:outset;
   
           }
       </style>
   
   {% endblock %}
   
   
   {% block main %}
     <ul class="nav_ul">
         <li role="presentation"><a href="{{ url_for('usercenter', user_id = question.author_id ) }}">全部问答</a></li>
         <li role="presentation"><a href="{{ url_for('usercenter',user_id = comments.author_id) }}">全部评论</a></li>
         <li role="presentation"><a href="{{ url_for('usercenter',user_id = user.id) }}">个人信息</a></li>
   
    </ul>
   
   {% block user %}{% endblock %}
   
   
   {% endblock %}

   {% 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 ques in question %}
                   <li class="list-group-item">
                       <span class="glyphicon glyphicon-heart-empty" aria-hidden="true"></span>
                       <a href="#">{{ ques.author.username }}</a>
                       <span class="badge">{{ ques.create_time }}</span>
                       <p>{{ ques.detail }}</p>
                   </li>
               {% endfor %}
           </ul>
       </div>
   
   {% endblock %}

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

   {% extends 'userbase.html' %}
   
   {% block user %}
       <div class="page-header">
           <h3><small>个人信息<span class="badge"></span></small></h3>
           <ul class="list-group" style=" ">
               <li class="list-group-item">用户:{{ username }}</li>
               <li class="list-group-item">编号:</li>
               <li class="list-group-item">文章数:</li>
               <p>     </p>
           </ul>
       </div>
   
   {% endblock %}