Swift animated circular progress bar - swift

Question

I have created a circular progress bar in Swift that animated over 1.5 seconds to value 1 when user hold on view. But I want to add a new viewcontroller when animation is done and restart my circular progressbar if user ended to early. Can someone help me?
Circulars progress bar is working with animation when user hold on view and stop at release.
class CounterView: UIView {
var bgPath: UIBezierPath!
var shapeLayer: CAShapeLayer!
var progressLayer: CAShapeLayer!
override init(frame: CGRect) {
super.init(frame: frame)
bgPath = UIBezierPath()
self.simpleShape()
}
required public init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
bgPath = UIBezierPath()
self.simpleShape()
}
func simpleShape()
{
createCirclePath()
shapeLayer = CAShapeLayer()
shapeLayer.path = bgPath.cgPath
shapeLayer.lineWidth = 5
shapeLayer.fillColor = nil
shapeLayer.strokeColor = UIColor.clear.cgColor
progressLayer = CAShapeLayer()
progressLayer.path = bgPath.cgPath
progressLayer.lineCap = kCALineCapRound
progressLayer.lineWidth = 5
progressLayer.fillColor = nil
progressLayer.strokeColor = UIColor.yellow.cgColor
progressLayer.strokeEnd = 0.0
self.layer.addSublayer(shapeLayer)
self.layer.addSublayer(progressLayer)
}
private func createCirclePath()
{
let x = self.frame.width/2
let y = self.frame.height/2
let center = CGPoint(x: x, y: y)
print(x,y,center)
bgPath.addArc(withCenter: center, radius: x/CGFloat(2), startAngle: CGFloat(0), endAngle: CGFloat(6.28), clockwise: true)
bgPath.close()
}
var animationCompletedCallback: ((_ isAnimationCompleted: Bool) -> Void)?
func setProgressWithAnimation(duration: TimeInterval, value: Float) {
CATransaction.setCompletionBlock {
if let callBack = self.animationCompletedCallback { callBack(true) }
}
CATransaction.begin()
let animation = CABasicAnimation (keyPath: "strokeEnd")
animation.duration = duration
animation.fromValue = 0
animation.toValue = value
animation.repeatCount = 1
animation.timingFunction = CAMediaTimingFunction (name: kCAMediaTimingFunctionLinear)
progressLayer.strokeEnd = CGFloat(value)
progressLayer.add(animation, forKey: "animateprogress")
CATransaction.commit()
}
func removeLayers() {
shapeLayer.removeAllAnimations()
shapeLayer.removeFromSuperlayer()
progressLayer.removeAllAnimations()
progressLayer.removeFromSuperlayer()
}
}
class ViewController: UIViewController {
#IBOutlet weak var counterView: CounterView!
#IBOutlet weak var holdView: UIView!
var isAnimationCompleted = false
override func viewDidLoad() {
super.viewDidLoad()
addLongPressGesture()
addCounterViewCallback()
}
#objc func longPress(gesture: UILongPressGestureRecognizer) {
if gesture.state == UIGestureRecognizerState.began {
// self.counterView.simpleShape()
self.counterView.setProgressWithAnimation(duration: 1.5, value: 1.0)
}
if gesture.state == UIGestureRecognizerState.ended {
if !isAnimationCompleted {
self.counterView.removeLayers()
}
}
}
func addLongPressGesture(){
let lpgr = UILongPressGestureRecognizer(target: self, action: #selector(longPress(gesture:)))
lpgr.minimumPressDuration = 0
self.holdView.addGestureRecognizer(lpgr)
}
private func addCounterViewCallback() {
counterView.animationCompletedCallback = { [weak self] (isCompleted) in
guard let weakSelf = self else {return}
weakSelf.isAnimationCompleted = isCompleted
weakSelf.addFlashView()
}
}
func addFlashView(){
let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
let resultViewController = storyBoard.instantiateViewController(withIdentifier: "ResultView") as! Flash
self.present(resultViewController, animated:true, completion:nil)
}
Add new viewcontroller when animation is done and restart animation if user release view and hold on it again.

Answer 1

Add a callback to know when animation is ended. And use CATransaction to know when animation is completed.
var animationCompletedCallback: (() -> Void)?
func setProgressWithAnimation(duration: TimeInterval, value: Float) {
CATransaction.setCompletionBlock {
if let callBack = animationCompletedCallback {
callBack()
}
}
CATransaction.begin()
let animation = CABasicAnimation (keyPath: "strokeEnd")
animation.duration = duration
animation.fromValue = 0
animation.toValue = value
animation.repeatCount = .infinity
animation.timingFunction = CAMediaTimingFunction (name: kCAMediaTimingFunctionLinear)
progressLayer.strokeEnd = CGFloat(value)
progressLayer.add(animation, forKey: "animateprogress")
CATransaction.commit()
}
And add this function after addLongPressGesture() in viewDidLoad() :
private func addCounterViewCallback() {
counterView.animationCompletedCallback = { [weak self] in
guard let weakSelf = self else {return}
weakSelf.addFlashView()
}
}
To remove layer use this:
func removeLayers() {
shapeLayer.removeAllAnimations()
shapeLayer.removeFromSuperlayer()
progressLayer.removeAllAnimations()
progressLayer.removeFromSuperlayer()
}
Update 1:
To remove animation if user stops pressing, you need can add on variable in callback like this :
var animationCompletedCallback: ((isAnimationCompleted: Bool) -> Void)?
So now callback in CounterView will be :
if let callBack = animationCompletedCallback { callBack(true) }
In your controller add one variable:
var isAnimationCompleted = false
Change addCounterViewCallback() :
private func addCounterViewCallback() {
counterView.animationCompletedCallback = { [weak self] (isCompleted) in
guard let weakSelf = self else {return}
weakSelf.isAnimationCompleted = isCompleted
weakSelf.addFlashView()
}
}
Now you can add one condition in your longPress():
if gesture.state == UIGestureRecognizerState.ended {
if !isAnimationCompleted {
//Call remove layers code
}
}
Update 2:
Add a variable in CounterView:
var isAnimationCompleted = true
Change callback like this :
CATransaction.setCompletionBlock {
if let callBack = self.animationCompletedCallback { callBack(isAnimationCompleted) }
}
In controller longPress() :
if gesture.state == UIGestureRecognizerState.ended {
if !isAnimationCompleted {
self.counterView.isAnimationCompleted = false
self.counterView.removeLayers()
}
}
Modify addCounterViewCallback() to this:
private func addCounterViewCallback() {
counterView.animationCompletedCallback = { [weak self] (isCompleted) in
guard let weakSelf = self else {return}
weakSelf.isAnimationCompleted = isCompleted
if isCompleted {
weakSelf.addFlashView()
}
}
}