title: Main~.storyboard file ,which is like a side effect
body: <p>I use multiple storyboards in my personal project. And I noticed there existed *~.storyboard like Main~.storyboard .</p>
  
  <p>I don't know that is why, which is like a side effect. Although my project is quite OK, I'd like to get some explanations.</p>
  
  <h3>Here is the Xcode outline.</h3>
  
  <blockquote>
    <p><a href="https://i.stack.imgur.com/eOamL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eOamL.png" alt="image"></a></p>
  </blockquote>
  
  <h3>Here is the folder of the project</h3>
  
  <blockquote>
    <p><a href="https://i.stack.imgur.com/cFDFY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cFDFY.png" alt="image"></a></p>
  </blockquote>
  
  <hr>
  
  <p>PS: It is not Microsoft related. I did not ever use Windows to develop iOS app.</p>