title: What name should I use for exception name of NSException, in Objective-C?
body: <p>I want to use <code>+[NSException exceptionWithName:reason:userInfo:]</code>.</p>
  
  <p>But what string should I use for argument <code>Name:</code>?</p>
  
  <p>Should exception name be unique in the project?<br>
  Or I can use @"MyException" for all of my exception?</p>
  
  <p>And I don't know what exception name is used for.<br>
  Where are exception names used?<br></p>