title: Button IBaction Connection is showing unknown symbol and application getting exception unrecognised selectoe sent to instance
body: <p>I have IBAction for buttons Those buttons are used for InAppPurchase. Suddenly these connection are turned as symbols as shown in the screenshot and when I tap on it my app getting an exception. Can someone help me to solve this issue</p>
  <blockquote>
  <p>[*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Ascent_copy.SettingsTableViewController userPressedOnUnlockFullVersion:]: unrecognized selector sent to instance 0x7f9e6b900000']</p>
  <p>[*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Ascent_copy.SettingsTableViewController userPressedRestore:]: unrecognized selector sent to instance 0x7fcc35033200']</p>
  </blockquote>
  <p><a href="https://i.stack.imgur.com/XlqIk.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/XlqIk.png" alt="Image attached" /></a></p>