博客园（自定义导航栏）

      

　　上一篇：博客园美化大全

 在上一篇博客中已经介绍了 自动生成目录、返回顶部、爱心特效、添加github图标、扩大和缩小、设置签名、添加分享和推荐反对功能，这一篇介绍怎么自定义导航栏。

 效果如下：

1.1.自定义导航栏

 我的博客皮肤用的是AnotherEon001,假如你的博客用的是其它皮肤，样式需要自己修改，要想达到一样的效果，建议也用同款皮肤

（1）把默认的导航栏给隐藏掉

既然我们想要自定义导航栏，默认的导航栏就不能显示

#header{display:none;}

（2）页首html代码

里面一个ul包含很多div（一个div代表一个分类），div里面是下拉框（a标签，里面是你的博客文章地址），自己可以随意增加删除分类。

<p style="text-align: center;font-size:35px;margin-bottom:19px;margin-top:20px;opacity: 0.5">Zhang_derek</p>

<div id="test33" >
    <ul style="margin-left:0px;margin-right: 0px;" class="test11" >
     
     

     <div class="dropdown">
      <a href="https://www.cnblogs.com/" class="dropbtn"><span style="22px;opacity: 0.2;font-size: 18px" >博客园</span></a>
        <div class="dropdown-content">
        </div>
      </div> 

<div class="dropdown">
      <a href="http://www.cnblogs.com/derek1184405959/" class="dropbtn"><span style="opacity: 0.2;font-size: 18px" >我的首页</span></a>
        <div class="dropdown-content">
        </div>
      </div> 
    
       <div class="dropdown">
      <a href="#" class="dropbtn">全部分类</a>
        <div class="dropdown-content">
        <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1131360.html"  >1.Python基础</a>
            <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1214771.html" >2.Django基础</a>
              <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1174868.html"  >3.Django项目</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1192235.html"  >4.REST framework</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1206098.html" >5.CRM客户关系管理</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1214770.html"  >6.前端</a>
          <a class="menu" href="https://cuiqingcai.com/"  >7.数据库</a>
          
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1212517.html" >8.python进阶</a>
           <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1214774.html"  target="_Blank">9.数据库</a>
           <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1163820.html"  target="_Blank">10.爬虫</a>
        </div>
      </div> 


        <div class="dropdown">
      <a href="http://www.cnblogs.com/derek1184405959/" class="dropbtn">Flask基础</span></a>
        <div class="dropdown-content">
           <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/9027171.html"  >1.快速入门</a>
           <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/9028895.html"  >2.请求扩展和数据库连接池</a>
           <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/9031618.html"  >3.信号和wtforms</a>
           <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/9032613.html"  >4.SQLAlchemy</a>
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        </div> 



      <div class="dropdown">
      <a href="#" class="dropbtn">Python基础</a>
        <div class="dropdown-content">
        <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8041517.html"  target="_Blank">1.简介</a>
            <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8041926.html"  target="_Blank">2.数据类型</a>
              <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8042679.html"  target="_Blank">3.文件操作</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8043411.html"  target="_Blank">4.迭代器生成器装饰器</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8044289.html"  target="_Blank">5.函数</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8065488.html"  target="_Blank">6.内置函数</a>
                       
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8078948.html"  target="_Blank">7.常用模块</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1131360.html"  target="_Blank">更多</a>
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      </div>   





        <div class="dropdown">
      <a href="#" class="dropbtn">Django基础</a>
        <div class="dropdown-content">
        <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8338229.html"  target="_Blank">1.安装与运行</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8351759.html"  target="_Blank">2.路由规则</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8377735.html"  target="_Blank">3.Model</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8421195.html"  target="_Blank">4.模板语言与分页</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8442120.html"  target="_Blank">5.Cookie</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8445045.html"  target="_Blank">6.Session</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8445842.html"  target="_Blank">7.CSRF 中间件</a>
        
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1214771.html"  target="_Blank">更多</a>
        </div>
      </div> 





        <div class="dropdown">
      <a href="#" class="dropbtn">项目相关</a>
        <div class="dropdown-content">
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8712206.html"  target="_Blank">1.REST framework 源码分析</a>
        <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8567522.html"  target="_Blank">2.用户注册和登录系统</a>
            <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8590360.html"  target="_Blank">3.在线教育平台</a>
              <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8733194.html"  target="_Blank">4.生鲜超市</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1206098.html"  target="_Blank">5.CRM客户关系管理
</a>
                <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1215982.html"  target="_Blank">6.Flask构建微电影
</a>
         
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      </div> 
    



         <div class="dropdown">
      <a href="#" class="dropbtn">Python进阶</a>
        <div class="dropdown-content">
        <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/9005830.html"  target="_Blank">1.魔法函数</a>
         <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/9011453.html"  target="_Blank">2.深入类和对象</a>
             
         
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1212517.html"  target="_Blank">更多</a>
        </div>
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        <div class="dropdown">
      <a href="#" class="dropbtn">Python爬虫</a>
        <div class="dropdown-content">
        <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8448875.html"  target="_Blank">1.urllib和urllib2</a>
            <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8449159.html"  target="_Blank">2.Opener和Requests</a>
              <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8449682.html"  target="_Blank">3.XPATH和BeautifulSoup4</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8449923.html"  target="_Blank">4.利用多线程爬虫</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8450130.html"  target="_Blank">5.Selenium模拟用户操作</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8450342.html"  target="_Blank">6.Scrapy框架原理介绍</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8450457.html"  target="_Blank">7.Spider类</a>
          
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1163820.html"  target="_Blank">更多</a>
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      </div> 

       
         <div class="dropdown">
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        <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8313575.html"  target="_Blank">1.HTML</a>
            <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8322341.html"  target="_Blank">2.CSS</a>
              <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8324589.html"  target="_Blank">3.Javascript</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8324860.html"  target="_Blank">4.Dom</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8331168.html"  target="_Blank">5.Jquery</a>
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8331789.html"  target="_Blank">6.Jquery实例</a>
                        <a class="menu" href="http://www.cnblogs.com/derek1184405959/p/8447397.html"  target="_Blank">7.Ajax</a>
         
          <a class="menu" href="http://www.cnblogs.com/derek1184405959/category/1214770.html"  target="_Blank">更多</a>
        </div>
      </div> 

      
      <div class="dropdown">
      <a href="#" class="dropbtn">学习资源</a>
        <div class="dropdown-content">
        <a class="menu" href="https://docs.djangoproject.com/en/2.0/"  target="_Blank">1.Django2.0官网</a>
            <a class="menu" href="http://www.django-rest-framework.org/"  target="_Blank">2.REST framework官网</a>
              <a class="menu" href="http://docs.jinkan.org/docs/flask/"  target="_Blank">3.Flask文档</a>
          <a class="menu" href="http://www.runoob.com/bootstrap/bootstrap-tutorial.html"  target="_Blank">4.Bootstrap教程</a>
          <a class="menu" href="http://blog.didiaoyuan.com/2017/04/18/%E6%80%BB%E6%9C%89%E4%BD%A0%E8%A6%81%E7%9A%84%E7%BC%96%E7%A8%8B%E4%B9%A6%E5%8D%95(GitHub)/"  target="_Blank">5.总有你要的书单</a>
          <a class="menu" href="http://www.pythondoc.com"  target="_Blank">6.python中文学习大本营</a>
                        <a class="menu" href="https://cuiqingcai.com/"  target="_Blank">7.爬虫学习博客</a>
          <a class="menu" href="http://www.pythondoc.com/flask-mega-tutorial/index.html"  target="_Blank">8.The Flask Mega-Tutorial </a>
        <a class="menu" href="http://ondras.zarovi.cz/sql/demo/"  target="_Blank">9.表设计工具 </a>
        <a class="menu" href="http://flask.pocoo.org/extensions/"  target="_Blank">10.Flask extensions</a>
        </div>
      </div>
      
      <div class="dropdown">
      <a href="#" class="dropbtn">娱乐休闲</a>
        <div class="dropdown-content">
        <a class="menu" href="https://weibo.com/"  target="_Blank">1.微博</a>
                                <a class="menu" href="http://720yun.com/"  target="_Blank">2.全景图片欣赏</a>
              <a class="menu" href="http://yingyu.xdf.cn/list_907_1.html"  target="_Blank">3.双语阅读</a>
          
          <a class="menu" href="http://china.nba.com/"  target="_Blank">4.NBA</a>
          <a class="menu" href="https://www.toutiao.com/"  target="_Blank">5.今日头条</a>
          <a class="menu" href="https://tieba.baidu.com/f?kw=%C4%DA%BA%AD%B6%CE%D7%D3&fr=ala0&tpl=5"  target="_Blank">6.内涵段子</a>
          
        </div>
      </div>

    </ul>
  </div>

 （3）页面定制css

#test33 ul {
margin: 0;
padding: 0;
list-style-type: none; /*去除li前的标注*/
background-color: #333;
overflow: hidden; /*隐藏溢出的部分，保持一行*/
}


#test33 li {
float: left; /*左浮动*/
}


#test33 li a, .dropbtn {
display: inline-block; /*设置成块*/
color: white;
text-align: center;
text-decoration: none;
padding: 14px 16px;
}


#test33 li a:hover, .dropdown:hover .dropbtn { /*鼠标移上去，改变背景颜色*/
background-color: blue;
}


#test33 .dropdown {
/*display:inline-block将对象呈递为内联对象，但是对象的内容作为块对象呈递。旁边的内联对象会被呈递在同一行内，允许空格。*/
display: inline-block;
}


#test33 .dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}


#test33 .dropdown-content a {
display: block;
color: black;
padding: 8px 10px;
text-decoration:none;
}


#test33 .dropdown-content a:hover {
background-color: #a1a1a1;
}


#test33 .dropdown:hover .dropdown-content{
display: block;
}

1.2.设置背景图片

给自己的博客设置一个好看的背景图片

（1）首先在设置---->>>相册里面添加一张背景图片

 （2）页面定制css代码

background-image里面的地址就是你相册里面添加的图片地址

body { 
     background-color: #efefef;
    background-image:url(http://images.cnblogs.com/cnblogs_com/today-happy/1214264/t_blog.jpg); 
     background-repeat: no-repeat; 
     background-attachment: fixed; 
     background-position: center 0; 
     background-size: cover; 
    padding-top:0px;
  }

1.3.一个好看的时钟

上一篇介绍了添加时钟，但是又发现了一个更好看的时钟，就分享给大家了，效果如下：

 （1）公告栏里面

时钟的宽高按可以自己设置合适的大小

<div id="clockdiv">

<canvas id="dom" width="120" height="120">时钟canvas</canvas>

</div>

<script type="text/javascript" src="https://files.cnblogs.com/files/siwuxie095/clock.js"></script>

（2）页面定制css代码

/*公告栏时钟*/
#clockdiv {

text-align: left;

}