Starting an action when View Controller Loads - ios

Question

How do I start an action when the view controller loads on screen?
I've managed to do the function I want with an #IBAction but I don't want a button press for the action to happen, I want it to start the action when the page loads
any thoughts?
class ViewController: UIViewController {
var progress: KDCircularProgress!
#IBOutlet weak var Label1: UILabel!
var LabelText = String()
var scorestart = 1.0
var anglepercent = 3.6
override func viewDidLoad() {
super.viewDidLoad()
Label1.text = LabelText
view.backgroundColor = UIColor(white: 0.22, alpha: 1)
progress = KDCircularProgress(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
progress.startAngle = -90
progress.progressThickness = 0.2
progress.trackThickness = 0.3
progress.clockwise = true
progress.gradientRotateSpeed = 10
progress.roundedCorners = false
progress.glowMode = .Forward
progress.glowAmount = 0.9
progress.setColors(UIColor.yellowColor())
progress.center = CGPoint(x: view.center.x, y: view.center.y + 25)
view.addSubview(progress)
}
#IBAction func Animate(sender: AnyObject) {
progress.angle = Double(scorestart * anglepercent)
progress.animateFromAngle(0, toAngle: 270, duration: 2) {
completed in
if completed {
print("animation stopped, completed")
} else {
print("animation stopped, was interrupted")
}

Answer 1

Use :-
Basic idea here is that whenever your view will load corresponding class will look up to viewWillAppear(animated: Bool) function and if it's present in the code it will execute all the code in it.The moment that particular view is about to appear on your UI, your code block in viewWillAppear(animated: Bool) will get called.
class ViewController: UIViewController {
var progress: KDCircularProgress!
#IBOutlet weak var Label1: UILabel!
var LabelText = String()
var scorestart = 1.0
var anglepercent = 3.6
override func viewDidLoad() {
super.viewDidLoad()
Label1.text = LabelText
view.backgroundColor = UIColor(white: 0.22, alpha: 1)
}
override func viewWillAppear(animated :Bool) {
super.viewWillAppear(animated)
progressActn()
//Setting up your progress layer
animateActn()
//Animating that progress layer
}
#IBAction func Animate(sender: AnyObject) {
animateActn()
}
func animateActn(){
progress.angle = Double(scorestart * anglepercent)
progress.animateFromAngle(0, toAngle: 270, duration: 2) {
completed in
if completed {
print("animation stopped, completed")
} else {
print("animation stopped, was interrupted")
}
}
}
func progressActn(){
progress = KDCircularProgress(frame: CGRect(x: 0, y: 0, width: 200, height: 200))
progress.startAngle = -90
progress.progressThickness = 0.2
progress.trackThickness = 0.3
progress.clockwise = true
progress.gradientRotateSpeed = 10
progress.roundedCorners = false
progress.glowMode = .Forward
progress.glowAmount = 0.9
progress.setColors(UIColor.yellowColor())
progress.center = CGPoint(x: view.center.x, y: view.center.y + 25)
view.addSubview(progress)
}
}