“Expected method body” error

Question

I had my application working fine, then without doing anything, out of nowhere I got 2 errors in appDelegate.h. One says this:

Expected

Answer 1

This message can also happen after pasting some code from Internet. There may be some invisible characters in your snippet.

• What you see in XCode with invisible chars OFF
  
• What's hidden (viewed in another text editor)
  
• What XCode 7.3 shows with invisible chars turned ON*
  
  You can configure XCode 7.3 to show the invisible characters by going in "Preferences...>Key bindings". Find "invisible" and choose a key combination (Command+shift+F1 for instance).

So ONE of the solutions (see others above...) if you have the "Expected Method Body" error is to re-type the erroneous line from scratch.