Short and useful Objective-C snippets?

Question

Since XCode 4, there is now a Code Snippets section which offers the snippets via auto-complete when typing. I\'d be very interested in snippets you all have stored in there. Wh

Answer 1

Dispatch block on the current queue after given number of seconds:

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, <#seconds#>*1e9),
    dispatch_get_current_queue(), <#block#>);