swift CATextLayer string does not update the value

Question

I'm trying to update circular bar CATextLayer every time button is pressed, but somehow it is not changing. Here is my code:`import UIKit

class ProgressBar: UIView {

private var backgroundLayer: CAShapeLayer!
private var foregroundLayer: CAShapeLayer!
private var progressTextLayer: CATextLayer!
private var progressDescriptionTextLayer: CATextLayer!

var progress: Int = 0 {
    didSet {
        didProgressUpdated()
    }
}

//MARK:- Custom shape drawing

override func draw(_ rect: CGRect) {
    let center = UIView(frame: rect).center
    let radius = CGFloat(55)
    let startAngle = -CGFloat.pi / 2
    let endAngle = startAngle + 2 * CGFloat.pi
    let lineWidth = CGFloat(12.0)
    
    let strokeShapeColor = UIColor(red: 73.0/255, green: 159.0/255.0, blue: 213.0/255.0, alpha: 1)
    
    let circularPath = UIBezierPath(arcCenter: center, radius: radius, startAngle: startAngle, endAngle: endAngle, clockwise: true)
    
    backgroundLayer = CAShapeLayer()
    backgroundLayer.path = circularPath.cgPath
    backgroundLayer.strokeColor = UIColor.lightGray.cgColor
    backgroundLayer.lineWidth = lineWidth
    backgroundLayer.fillColor = .none
    backgroundLayer.lineCap = .round

    foregroundLayer = CAShapeLayer()
    foregroundLayer.path = circularPath.cgPath
    foregroundLayer.strokeColor = strokeShapeColor.cgColor
    foregroundLayer.lineWidth = lineWidth
    foregroundLayer.fillColor = .none
    foregroundLayer.lineCap = .round
    foregroundLayer.strokeEnd = 0.5
    
    progressTextLayer = createProgressTextLayer(rect: rect)
    progressDescriptionTextLayer = createProgressTextDescriptionLayer(rect: rect)
    
    layer.addSublayer(progressDescriptionTextLayer)
    layer.addSublayer(progressTextLayer)
    layer.addSublayer(backgroundLayer)
    layer.addSublayer(foregroundLayer)
}

//MARK:- Progress text layer

private func createProgressTextLayer(rect: CGRect) -> CATextLayer {
    let width = rect.width
    let height = rect.height
    let fontSize = CGFloat(30)
    let offset = min(width, height) / 1.6
    
    let layer = CATextLayer()
    layer.string = "(progress)/12"
    layer.backgroundColor = .none
    layer.foregroundColor = UIColor.black.cgColor
    layer.fontSize = fontSize
    layer.frame = CGRect(x: 0, y: (height - fontSize - offset), width: width, height: fontSize + offset)
    layer.alignmentMode = .center
    
    
    return layer
}

//MARK:- Progress text description layer

private func createProgressTextDescriptionLayer(rect: CGRect) -> CATextLayer {
    let width = rect.width
    let height = rect.height
    let fontSize = CGFloat(18)
    let offset = min(width, height) / 2.2
    
    let layer = CATextLayer()
    layer.string = "Progresas"
    layer.backgroundColor = .none
    layer.foregroundColor = UIColor.black.cgColor
    layer.fontSize = fontSize
    layer.frame = CGRect(x: 0, y: (height - fontSize - offset), width: width, height: fontSize + offset)
    layer.alignmentMode = .center
    
    
    return layer
}

//MARK:- Did progress updated func

 func didProgressUpdated() {
    progressTextLayer?.string = "(Int(progress))/12"
    foregroundLayer?.strokeEnd = CGFloat(progress)
    print("(progress) from progress bar") // just checking if its updating value here
}

}

And here is Home view controller where button is

import UIKit import Foundation

class HomeViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {

let progressBar = ProgressBar()

@IBOutlet var studentLabel: UILabel!
@IBOutlet var studentsTableView: UITableView!

//MARK:- Button implementation

@IBOutlet var pickGroupButton: UIButton! {
    didSet {
        pickGroupButton.layer.cornerRadius = 25.0
        pickGroupButton.layer.masksToBounds = true
        pickGroupButton.layer.backgroundColor = CGColor(red: 73.0/255, green: 159.0/255.0, blue: 213.0/255.0, alpha: 1)
    }
}

@IBAction func pickGroupButtonPressed(_ sender: UIButton) {
    switch students.isEmpty {
    case false:
        progressBar.progress += 1
        studentLabel.isHidden = false
        addStudentToTheStage()
    case true:
        progressBar.progress = 0
        studentLabel.isHidden = true
        pickGroupButton.titleLabel?.text = "I? NAUJO"
    }
    print("(progressBar.progress)")
}

//MARK:- Students list

var students: [Student] = [
    Student(name: "hd", surname: "fdgh"),
    Student(name: "dfgh", surname: "fdgh"),
    Student(name: "dfgh", surname: "fdgh"),
    Student(name: "fgh", surname: "dfgh"),
    Student(name: "fdgh", surname: "fdgh"),
    Student(name: "fdh", surname: "fdgh"),
    Student(name: "fdh fdhg", surname: "fgh"),
    Student(name: "fdgh", surname: "fdgh"),
    Student(name: "fdh", surname: "dfgh"),
    Student(name: "fgh", surname: "fgh"),
    Student(name: "dfgh", surname: "dhf"),
    Student(name: "dfgh", surname: "dhfg")
]

override func viewDidLoad() {
    super.viewDidLoad()
    studentsTableView.delegate = self
    studentsTableView.dataSource = self

}

} //MARK:- Table view implementation

extension HomeViewController {

func numberOfSections(in tableView: UITableView) -> Int {
   // #warning Incomplete implementation, return the number of sections
   return 1

}

func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
    let header = "Studentai"
    
    return header.uppercased()
}

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
   // #warning Incomplete implementation, return the number of rows
   return students.count

}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
   let cell = tableView.dequeueReusableCell(withIdentifier: "StudentListCell", for: indexPath)

   let studentRow = students[indexPath.row]
    cell.textLabel?.text = studentRow.name + " " + studentRow.surname
   
   return cell

}

//MARK:- pick student

func addStudentToTheStage() {
    guard let randomStudent = students.randomElement() else { return }
    studentLabel.text = randomStudent.name + " " + randomStudent.surname
}

} `

question from:https://stackoverflow.com/questions/65895597/swift-catextlayer-string-does-not-update-the-value

Answer 1

Waitting for answers