Looping animations with duration, Swift 4 - swift

Question

I have an image that I want to move 10 separate times in a row. Each time I want it to do a check, as notated by the print statement of checkForStuff. I noticed that the loop starts and it times out while the first of the 10 moves occurs. Any thoughts on how to chain animations, or do I need to manually write each chain in the sequential closure?
#objc func moveBox(sender: UIButton!) {
print("Started")
let imageToMove = UIImageView()
imageToMove.frame = CGRect(x: 50, y: 50, width: 50, height: 50)
imageToMove.backgroundColor = .red
self.view.addSubview(imageToMove)
var counter = 0
var altitude = 100
while counter <= 10 {
print("looping")
UIView.animate(withDuration: 0.5, animations: {
imageToMove.frame = CGRect(x: 50, y: altitude, width: 50, height: 50)
}, completion: { finished in
counter += 1
altitude += 50
print("Check For Stuff")
})
}
}
In short, in should move 50 pixels down, execute the closure, move 50 pixels down again. and again, and again.

Answer 1

Try Recursion as suggested by #matt
func animate(view: UIView, altitude: Int, numberOfTime: Int ) {
if numberOfTime == 0 { return }
UIView.animate(withDuration: 0.5, animations: {
view.frame = CGRect(x: 50, y: altitude, width: 50, height: 50)
}, completion: { finished in
self.animate(view: view, altitude: altitude + 50, numberOfTime: numberOfTime - 1)
})
}
Use this as
#objc func moveBox(sender: UIButton!) {
print("Started")
let imageToMove = UIImageView()
imageToMove.frame = CGRect(x: 50, y: 50, width: 50, height: 50)
imageToMove.backgroundColor = .red
self.view.addSubview(imageToMove)
animate(view: imageToMove, altitude: 100, numberOfTime: 10)
}