how to use values returned by Swift function

Question

I am trying to use a Swift function to place a circle in the centre of a view so it is always on centre regardless of screen size. I can draw the circle at a point defined by a

Answer 1

Your screenCenter function returns a tuple containing two CGFloat values. These values are labeled x and y so you can access them by name when querying the function’s return value.

override func viewDidLoad() {
    super.viewDidLoad()

    let center = screenCentre()
    //center.x contains the x value returned from screenCenter
    //center.y contains the y value returned from screenCenter

    circle(x: center.x , y: center.y)
}