-performSelector:withObject:afterDelay: isn't available in Swift. Generally, it's a bad idea to use -performSelector: and it's variants, but there are exceptions, especially since not all code ends up in production. I find it particularly helpful during development to use it to auto-navigate to the screen I am currently working on. Courtesy of Stack Overflow, in Swift, we can use dispatch_time() to build something similar.

func delay(delay:Double, closure:()->()) {
    dispatch_after(
        dispatch_time(DISPATCH_TIME_NOW, Int64(delay * Double(NSEC_PER_SEC))),
        dispatch_get_main_queue(),
        closure)
}

and call it like this:

delay(0.7) {
    //do something here
}

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