知识点：

1、按钮组件
2、输入框

1、按钮组件

1）基本的按钮组

  <div class="btn-group">
      <button class="btn btn-default">left</button>
      <button class="btn btn-default">middle</button>
      <button class="btn btn-default">right</button>
  </div>

2）按钮工具栏

  <div class="btn-toolbar">
      <div class="btn-group">
          <button class="btn btn-default">left</button>
          <button class="btn btn-default">middle</button>
          <button class="btn btn-default">right</button>
      </div>
      <div class="btn-group">
          <button class="btn btn-default">left</button>
          <button class="btn btn-default">middle</button>
          <button class="btn btn-default">right</button>
      </div>
      <div class="btn-group">
          <button class="btn btn-default">更多</button>
      </div>
  </div>

3）按钮的大小

  <div class="btn-group btn-group-lg">
      <button class="btn btn-default">left</button>
      <button class="btn btn-default">middle</button>
      <button class="btn btn-default">right</button>
  </div>
  <div class="btn-group btn-group-sm">
      <button class="btn btn-default">left</button>
      <button class="btn btn-default">middle</button>
      <button class="btn btn-default">right</button>
  </div>
  <div class="btn-group btn-group-xs">
      <button class="btn btn-default">left</button>
      <button class="btn btn-default">middle</button>
      <button class="btn btn-default">right</button>
  </div>

4）嵌套

  <div class="btn-group">
      <button class="btn btn-default">left</button>
      <button class="btn btn-default">middle</button>
      <div class="btn-group">
          <button class="btn btn-default dropdown-toggle" data-toggle="dropdown">按钮 <span class="caret"></span></button>
          <ul class="dropdown-menu">
              <li><a href="">1</a></li>
              <li><a href="">2</a></li>
              <li><a href="">3</a></li>
          </ul>
      </div>
  </div>

5）垂直的按钮组

  <div class="btn-group-vertical">
      <button class="btn btn-default">left</button>
      <button class="btn btn-default">middle</button>
      <div class="btn-group">
          <button class="btn btn-default dropdown-toggle" data-toggle="dropdown">按钮 <span class="caret"></span></button>
          <ul class="dropdown-menu">
              <li><a href="">1</a></li>
              <li><a href="">2</a></li>
              <li><a href="">3</a></li>
          </ul>
      </div>
  </div>

6）两端对齐排列的按钮组

  <div class="btn-group btn-group-justified">
      <div class="btn-group">
          <button class="btn btn-default">left</button>
      </div>
      <div class="btn-group">
          <button class="btn btn-default">middle</button>
      </div>
      <div class="btn-group">
          <button class="btn btn-default">right</button>
      </div>
  </div>
  <div class="btn-group btn-group-justified">
      <!--<div class="btn-group">-->    为了浏览器兼容问题使用btn-group包裹
          <a href="" class="btn btn-default">left</a>
      <!--</div>-->
      <!--<div class="btn-group">-->
          <a href="" class="btn btn-default">middle</a>
      <!--</div>-->
      <!--<div class="btn-group">-->
          <a href="" class="btn btn-default">right</a>
      <!--</div>-->
  </div>

7）按钮式下拉菜单

  a）单按钮下拉菜单   btn-default  btn-success  btn-primary   btn-info   btn-danger   btn-warning
     <div class="btn-group">
         <button class="btn btn-default dropdown-toggle" data-toggle="dropdown">Default <span class="caret"></span></button>
         <ul class="dropdown-menu">
             <li><a href="">html</a></li>
             <li><a href="">javascript</a></li>
             <li><a href="">jQuery</a></li>
         </ul>
     </div>
  b）分裂式按钮下拉菜单
     <div class="btn-group">
         <button class="btn btn-default">Default</button>
         <button class="btn btn-default dropdown-toggle" data-toggle="dropdown"><span class="caret"></span></button>
         <ul class="dropdown-menu">
             <li><a href="">html</a></li>
             <li><a href="">javascript</a></li>
             <li><a href="">jQuery</a></li>
         </ul>
     </div>
  ####c）按钮下拉菜单的大小   btn-lg   btn-sm   btn-xs
     <div class="btn-group">
         <button class="btn btn-default btn-lg dropdown-toggle" data-toggle="dropdown">Default <span class="caret"></span></button>
         <ul class="dropdown-menu">
             <li><a href="">html</a></li>
             <li><a href="">javascript</a></li>
             <li><a href="">jQuery</a></li>
         </ul>
     </div>
 #### d）向上弹出式菜单    dropup
     <div class="btn-group dropup">
         <button class="btn btn-default btn-lg dropdown-toggle" data-toggle="dropdown">Default <span class="caret"></span></button>
         <ul class="dropdown-menu">
             <li><a href="">html</a></li>
             <li><a href="">javascript</a></li>
             <li><a href="">jQuery</a></li>
         </ul>
     </div>

2、输入框

1）基本的输入框组

  <form action="">
      <div class="input-group">
          <span class="input-group-addon">@</span>
          <input type="text" class="form-control"/>
      </div>
      <div class="input-group">
          <input type="text" class="form-control"/>
          <span class="input-group-addon">.00</span>
      </div>
      <div class="input-group">
          <span class="input-group-addon">$</span>
          <input type="text" class="form-control"/>
          <span class="input-group-addon">.00</span>
      </div>
  </form>

2）输入框组的大小 input-group-lg input-group-xs input-group-sm

  <form action="">
      <div class="input-group input-group-lg">
          <span class="input-group-addon">@</span>
          <input type="text" class="form-control"/>
      </div>
  </form>

3）复选框和单选框插件

  <form action="">
      <div class="row">
           <div class="col-md-6">
               <div class="input-group">
                   <span class="input-group-addon">
                       <input type="checkbox"/>
                   </span>
                   <input type="text" class="form-control"/>
               </div>
           </div>
      </div>
  </form>

4）按钮插件 input-group-btn

  <form action="">
      <div class="row">
          <div class="col-md-6">
              <div class="input-group">
                  <span class="input-group-btn">
                      <button class="btn btn-default">Go</button>
                  </span>
                  <input class="form-control" type="text"/>
              </div>
          </div>
      </div>
  </form>

5）按钮式下拉菜单

  <form action="">
      <div class="row">
          <div class="col-md-6">
              <div class="input-group">
                  <div class="input-group-btn">
                      <button class="btn btn-default dropdown-toggle" data-toggle="dropdown">dropdown<span class="caret"></span></button>
                      <ul class="dropdown-menu">
                          <li><a href="">资讯</a></li>
                          <li><a href="">新闻</a></li>
                          <li><a href="">关于</a></li>
                      </ul>
                  </div>
                  <input class="form-control" type="text"/>
              </div>
          </div>
      </div>
  </form>

6）分裂式按钮下拉菜单
<form action="">
<div class="row">
<div class="col-md-6">
<div class="input-group">
<div class="input-group-btn">
<button class="btn btn-default">dropdown</button>
<button class="btn btn-default dropdown-toggle" data-toggle="dropdown">
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li><a href="">资讯</a></li>
<li><a href="">新闻</a></li>
<li><a href="">关于</a></li>
</ul>
</div>
<input class="form-control" type="text"/>
</div>
</div>
</div>
</form>