Swift - How to know when a loop has ended?

Question

Please, forgive me as i\'m very new to swift, and programming in general.

Believe me when I say I\'ve tried hard to understand this, but I simply ca

Answer 1

To produce the same result as what others have posted but with basic closure syntax:

func printFunction() {
    println("loop has finished")
}

func loopWithCompletion(closure: () -> ()) {
    for var i=0; i<5; i++ {
        println(i)
    }
    closure()
}

This is how you call it:

 loopWithCompletion(printFunction)

Swift 3 Update:

func printFunction() {
    print("loop has finished")
}

// New for loop syntax and naming convention
func loop(withCompletion completion: () -> Void ) {
    for i in 0 ..< 5 {
        print(i)
    }
    completion()
}

Then call it like this:

loop(withCompletion: printFunction)

Or

loop {
    print("this does the same thing")
}