默认选中的复选框不会在点击时切换

我正在使用Reactjs。我正在使用Modal from react-bootstrap创建Modal表单。我使用bootstrap创建了一个表单。该表格包含默认情况下需要检查的复选框。所以我使用checked属性作为输入复选框。但是当我点击它时，复选框不会切换。我无法弄清楚这个问题。这里是我的代码：默认选中的复选框不会在点击时切换

<Modal show={this.state.showModal} onHide={this.closeModal}> 
<Modal.Header closeButton> 
    <Modal.Title>Create New User</Modal.Title> 
</Modal.Header> 
<Modal.Body> 

    <form class="form-horizontal" name="newUser"> 
     <div class="form-group"> 
      <label class="control-label col-md-4" for="userName">User Name</label> 
      <div class="col-md-6"> 
       <input type="text" class="form-control" id="userName" ref="userName" placeholder="User Name"/> 
      </div> 
     </div> 
     <div class="form-group"> 
      <label class="control-label col-md-4" for="password">Password</label> 
      <div class="col-md-6"> 
       <input type="password" class="form-control" id="password" ref="password" placeholder="Enter Password"/> 
      </div> 
     </div> 
     <div class="form-group"> 
      <label class="control-label col-md-4" for="password">Confirm Password</label> 
      <div class="col-md-6"> 
       <input type="password" class="form-control" id="confirmPassword" ref="password" placeholder="Re-enter Password"/> 
      </div> 
     </div> 
     <div class="form-group"> 
      <label class="control-label col-md-4" for="email">Email Address</label> 
      <div class="col-md-6"> 
       <input type="email" class="form-control" id="email" ref="email" placeholder="Email Address"/> 
      </div> 
     </div> 
     <div class="form-group"> 
      <div class="col-md-offset-4 col-md-6"> 
       <div class="checkbox-inline"> 
        <label><input type="checkbox" id="enabled" ref="enabled" value="enabled" checked/> Enabled </label> 
       </div> 
       <div class="checkbox-inline"> 
        <label><input type="checkbox" id="locked" ref="locked" value="locked" /> Locked </label> 
       </div> 
      </div> 
     </div> 
    </form> 
</Modal.Body> 
<Modal.Footer> 
    <Button onClick={this.submitUser} bsStyle="primary">Confirm</Button> 
    <Button onClick={this.closeModal} bsStyle="warning">Cancel</Button> 
</Modal.Footer> 
</Modal>

这里是。提前感谢您的帮助。