隐藏可连接的外围设备(Hide a connectable peripheral device)

 我刚刚使用你的zip文件测试了你的应用程序。 
 
 我观察到的是，这不是放在#success div中的整个页面，而只是Posts/add.ctp视图的内容。 所以基本上这意味着RequestHandler正确地完成它的工作，这意味着使用的布局是 'ajax'布局。 为了摆脱表单中的任何其他内容，add.ctp页面不应包含表单中的任何其他内容。 在您的情况下， Posts/add.ctp包含导航链接，这就是它们被复制的原因。 
 
 也就是说，提交按钮当前正在获取Posts/add.ctp视图的内容并将其插入空的#success div中。 但是你永远不会删除页面上已有的表单。 你可以做的是更新包含你的第一个表单的div的内容，甚至是整个Posts/add.ctp视图的内容。 
 
 在您的情况下，只需更新#content而不是#success div可能适合您的需求： 
 
echo $this->Js->submit('Send', array(
  'before'=>$this->Js->get('#sending')->effect('fadeIn'),
  'success'=>$this->Js->get('#sending')->effect('fadeOut'),
  'update'=>'#content',
  'class'=>'btn btn-primary',
  'controller'=>'posts',
  'action'=>'add'
));

I just tested your application by using your zip file.
 
What I observed is that this is not the whole page that is put inside your #success div, but only the content of the Posts/add.ctp view. So basically this means the RequestHandler does its job correctly, meaning the layout that is used is the 'ajax' layout. To get rid of anything else that the form, the add.ctp page should not contain anything else that the form. In your case Posts/add.ctp contains navigation links, and that's why they get duplicated.
 
That said, what the submit button does currently is getting the content of Posts/add.ctp view and insert it in your empty #success div. But you never remove the form that was already on the page. What you could do is updating the content of a div that contains your first form, or even the content of the whole Posts/add.ctp view.
 
In your case, simply updating the #content instead of the #success div could maybe suit your needs:
 
echo $this->Js->submit('Send', array(
  'before'=>$this->Js->get('#sending')->effect('fadeIn'),
  'success'=>$this->Js->get('#sending')->effect('fadeOut'),
  'update'=>'#content',
  'class'=>'btn btn-primary',
  'controller'=>'posts',
  'action'=>'add'
));