title: cocoa: how to add a thick bar for a view?
body: <p>I want to add a thick bar for my custom view, like Finder search as follow:</p>
  
  <p><img src="https://i.stack.imgur.com/FbJjm.png" alt="enter image description here"></p>
  
  <p>there's only tool bar in Interface Builder,I just need to add a thick bar and I can customize the button on it using IB, is there any way to do it?</p>