完成个人中心—导航标签

1. 个人中心—视图函数带标签页面参数tag
   @app.route('/usercenter/<user_id>/<tag>')
   def usercenter(user_id, tag):
      if tag == ‘1':
          return render_template('usercenter1.html', **context)
   

   @app.route('/usercenter/<user_id>/<tag>')
   @loginFirst
   def usercenter(user_id, tag):
       user = User.query.filter(User.id == user_id).first()
       context = {
           # 'username': user.username,
           'questions': user.question,
           'comments': user.comments,
           'user': user
       }
       if tag == '1':
           return render_template('usercenter1.html', **context)
       elif tag == '2':
           return render_template('usercenter2.html', **context)
       else:
           return render_template('usercenter3.html', **context)
   

   　　

2. 个人中心—导航标签链接增加tag参数
   <li role=“presentation”><a href=“{{ url_for(‘usercenter’,user_id = user.id,tag = ‘1’) }}">全部问答</a></li>

   <ul class="nav_ul">
       <li role="presentation" class="active"><a href="{{ url_for('usercenter',user_id=user.id,tag= 1) }}" class="current_nav">全部问答</a> </li>
       <li role="presentation"><a href="{{ url_for('usercenter',user_id=user.id,tag = 2) }}" class="current_nav">全部评论</a> </li>
       <li role="presentation"><a href="{{ url_for('usercenter',user_id=user.id,tag = 3) }}" class="current_nav">个人信息</a> </li>
   </ul>
   

   　　

3. 个人中心—有链接到个人中心页面的url增加tag参数
   u <a href="{{ url_for('usercenter',user_id = session.get('userid'), tag=1) }}">{{ session.get('user') }}</a>

   <a  href="{{ url_for('usercenter',user_id=user1.id,tag=1)}}" class="base">{{ user1.username}}</a>
   <a href="{{ url_for('usercenter',user_id=ques.author.id,tag=1) }}" class="light">{{foo.author.username }}</a>
   <a href="{{ url_for('usercenter',user_id = foo.author_id,tag=1) }}" class="lightblue">{{ foo.author.username }}</a>