Swift 实现一个实时环形进度条

直接上代码：

   class CircularProgressBarView: UIView {
        private let backgroundLayer = CAShapeLayer()
        private let progressLayer = CAShapeLayer()
        
        override init(frame: CGRect) {
            super.init(frame: frame)
            configure()
        }
        
        required init?(coder: NSCoder) {
            super.init(coder: coder)
            configure()
        }
        
        private func configure() {
            // 创建底部圆形路径
            let center = CGPoint(x: bounds.midX, y: bounds.midY)
            let lineWidth: CGFloat = 3 // 圆环路径宽度
            let radius = (min(bounds.width, bounds.height) - lineWidth) / 2 // 圆的半径
            let startAngle = -CGFloat.pi / 2 // 起始角度
            let endAngle = 1.5 * CGFloat.pi // 终点角度
            
            let backgroundPath = UIBezierPath(arcCenter: center,
                                              radius: radius,
                                              startAngle: startAngle,
                                              endAngle: endAngle,
                                              clockwise: true)
            
            // 配置底部CAShapeLayer
            backgroundLayer.path = backgroundPath.cgPath
            backgroundLayer.strokeColor = UIColor.white.withAlphaComponent(0.4).cgColor // 底部圆的颜色
            backgroundLayer.fillColor = UIColor.clear.cgColor
            backgroundLayer.lineWidth = lineWidth // 进度条宽度
            backgroundLayer.lineCap = .round
            
            layer.addSublayer(backgroundLayer)
            
            // 创建进度条圆形路径
            let progressPath = UIBezierPath(arcCenter: center,
                                            radius: radius,
                                            startAngle: startAngle,
                                            endAngle: endAngle,
                                            clockwise: true)
            
            // 配置进度条CAShapeLayer
            progressLayer.path = progressPath.cgPath
            progressLayer.strokeColor = UIColor(hex: 0x00BF60).cgColor // 进度条颜色
            progressLayer.fillColor = UIColor.clear.cgColor
            progressLayer.lineWidth = lineWidth // 进度条宽度
            progressLayer.lineCap = .round
            
            // 设置初始进度
            progressLayer.strokeEnd = 0
            
            layer.addSublayer(progressLayer)
        }
        
        func setProgress(_ progress: Float, animated: Bool) {
            let animation = CABasicAnimation(keyPath: "strokeEnd")
            animation.fromValue = progressLayer.strokeEnd
            animation.toValue = progress
            animation.duration = animated ? 1.0 : 0
            progressLayer.strokeEnd = CGFloat(progress)
            progressLayer.add(animation, forKey: "progressAnimation")
        }
    }