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iOS

Posted by mattlebl
mattlebl
10,849 Points

Can the "() -> Void in" in a Swift closure be omitted?

I've seen closures which look like this

{
  // code
}

work just fine, but in most closures written in Treehouse courses closures always have empty parameters and empty return type, like so

{ () -> Void in
  // code
}

Can anyone clarify? We're not passing in any parameters, or returning anything, just passing code to be executed elsewhere.

Robert Mehew
Robert Mehew
2,427 Points

Not sure if this will help.

When I was following a course on Swift on Treehouse I couldn't get the async_dispatch to work if I used () -> Void in, but it did work if I left it out and added a return at the end. It could be that xcode has updated to no longer require it, but i'm not 100%.