How to call function from custom UIView class? - ios

Question

I have UIView in my first view controller. I have set that UIView class to Custom Progress View using following code.
class ProgressView: UIView {
let trackLayer = CAShapeLayer()
let shapeLayer = CAShapeLayer()
static let instance = ProgressView()
override func awakeFromNib() {
super.awakeFromNib()
let center = CGPoint.init(x: frame.width / 2, y: frame.height / 2)
let circularPath = UIBezierPath(arcCenter: center, radius: 30, startAngle: -CGFloat.pi / 2, endAngle: 2 * CGFloat.pi, clockwise: true)
trackLayer.path = circularPath.cgPath
trackLayer.strokeColor = #colorLiteral(red: 0.4745098054, green: 0.8392156959, blue: 0.9764705896, alpha: 1)
trackLayer.lineWidth = 3
trackLayer.fillColor = #colorLiteral(red: 0.5568627715, green: 0.3529411852, blue: 0.9686274529, alpha: 1)
trackLayer.lineCap = kCALineCapRound
self.layer.addSublayer(trackLayer)
shapeLayer.path = circularPath.cgPath
shapeLayer.strokeColor = #colorLiteral(red: 0.8078431487, green: 0.02745098062, blue: 0.3333333433, alpha: 1)
shapeLayer.lineWidth = 3
shapeLayer.fillColor = #colorLiteral(red: 0.3794638515, green: 0.5145698786, blue: 0.9605538249, alpha: 1)
shapeLayer.lineCap = kCALineCapRound
shapeLayer.strokeEnd = 0
self.layer.addSublayer(shapeLayer)
}
}
There is also a function inside that custom UIView class which is for starting animation for filling circle with following code
func startProgress() {
let basicAnimation = CABasicAnimation(keyPath: "strokeEnd")
basicAnimation.toValue = 1
basicAnimation.duration = 60
basicAnimation.fillMode = kCAFillModeForwards
basicAnimation.isRemovedOnCompletion = false
shapeLayer.add(basicAnimation, forKey: "soBasic")
}
I need to call that startProgress function inside my First View controller. In viewDidLoad I have called ProgressView.instance.startProgress() but it is not firing. How can I call start progress function from another class?

Answer 1

In ProgressView you need to create an initialise or you can use default one.
class ProgressView: UIView {
//you can set any additional properties in it.
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
How to use
In view controller where you wanna use...
let pgView = ProgressView() //or any other initialise if you have created
.
.
.
pgView.startProgress()