title: How can I add file to project in Xcode 9?
body: <p>I created a new project in xcode 9.</p>
  
  <p>I want to add image file to project.</p>
  
  <p><a href="https://i.stack.imgur.com/D9tUS.png" rel="noreferrer"><img src="https://i.stack.imgur.com/D9tUS.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/UnGGE.png" rel="noreferrer"><img src="https://i.stack.imgur.com/UnGGE.png" alt="enter image description here"></a></p>
  
  <p>When I delete this file from desktop,</p>
  
  <p>Image file appears in red?</p>
  
  <p><a href="https://i.stack.imgur.com/l9Mw4.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/l9Mw4.jpg" alt="enter image description here"></a></p>
  
  <p>But in project folder, I find this image file.</p>
  
  <p><a href="https://i.stack.imgur.com/7GCNO.png" rel="noreferrer"><img src="https://i.stack.imgur.com/7GCNO.png" alt="enter image description here"></a></p>
  
  <p>In Xcode 8 its working fine,</p>
  
  <p>Any idea?</p>