Created
October 11, 2019 08:09
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import UIKit | |
class CircleProgressView: UIView { | |
var value: CGFloat = 0 { | |
didSet { | |
DispatchQueue.main.async { [weak self] in | |
self?.animate() | |
} | |
} | |
} | |
private let shapeLayer = CAShapeLayer() | |
private let trackLayer = CAShapeLayer() | |
private let lineWidth: CGFloat = 20 | |
override func draw(_ rect: CGRect) { | |
super.draw(rect) | |
addShapes() | |
} | |
func addShapes() { | |
let circularPath = UIBezierPath(arcCenter: .zero, | |
radius: frame.width / 2, | |
startAngle: 0, | |
endAngle: CGFloat.pi * 2, | |
clockwise: true) | |
trackLayer.path = circularPath.cgPath | |
trackLayer.strokeColor = UIColor.gray.cgColor | |
trackLayer.lineWidth = lineWidth | |
trackLayer.fillColor = UIColor.clear.cgColor | |
trackLayer.lineCap = CAShapeLayerLineCap.round | |
trackLayer.position = center | |
shapeLayer.path = circularPath.cgPath | |
shapeLayer.strokeColor = UIColor.blue.cgColor | |
shapeLayer.lineWidth = lineWidth | |
shapeLayer.fillColor = UIColor.clear.cgColor | |
shapeLayer.lineCap = .round | |
shapeLayer.strokeEnd = 0 | |
shapeLayer.position = center | |
shapeLayer.transform = CATransform3DMakeRotation(-CGFloat.pi / 2, 0, 0, 1) | |
layer.addSublayer(trackLayer) | |
layer.addSublayer(shapeLayer) | |
} | |
func animate() { | |
let basicAnimation = CABasicAnimation(keyPath: "strokeEnd") | |
basicAnimation.beginTime = CACurrentMediaTime() + 0.1 | |
basicAnimation.toValue = value | |
basicAnimation.duration = 1 | |
basicAnimation.fillMode = .forwards | |
basicAnimation.isRemovedOnCompletion = false | |
shapeLayer.add(basicAnimation, forKey: "") | |
} | |
} |
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