title: Can't connect IBAction in Xcode
body: <p>When I drag from a button on the storyboard to my view controller Swift file, I only get the option to insert an Outlet or Outlet Collection.</p>
  
  <p>Similarly, if I create the IBAction manually and try to connect it to a button on the storyboard, I can't connect the two.</p>
  
  <p>This problem is only appears in one of my projects, but it happens on all the storyboards in my project.</p>
  
  <p>Seems like an Xcode bug, but maybe someone knows of a workaround.</p>
  
  <p>(It's hard to tell, but the element being dragged in the screenshot is a button.)</p>
  
  <p><img src="https://i.stack.imgur.com/AGInu.jpg" alt="enter image description here"></p>