swift:让自定义进度视图跟随用户点击?乌比齐尔

好的,我在这里实现了一个圆形的自定义uiprogressview:

class PlaybackLineView: UIView {
    var percentage: Float = 0.0 {
        didSet {
            if percentage > 1 {
                //print("happned!")
                percentage = 1.0
            }

            DispatchQueue.main.async {
                self.setNeedsDisplay()
            }
        }
    }

    override func draw(_ rect: CGRect) {
        let playbackRed = UIColor(red: 181/255.0, green: 23/255.0, blue: 65/255.0, alpha: 1.0)
        playbackRed.setFill()
        playbackRed.setStroke()

        let newWidth = rect.size.width * CGFloat(percentage)
        let fillRect = CGRect(x: 0, y: 0, width: newWidth, height: rect.size.height)
        let fillRectPath = UIBezierPath(rect: fillRect)
        fillRectPath.fill()
    }

@IBInspectable public var drawEndPoint: Bool = true
    @IBInspectable public var drawWhenZero: Bool = false
    @IBInspectable public var strokeWidth: CGFloat = 3.0

    let smallCircleRadius: CGFloat = 6.0
    var fullCirclePath: UIBezierPath!


    override func draw(_ rect: CGRect) {
        if !drawWhenZero && (percentage == 0 || percentage == 1) { return }

        UIColor.clear.setFill()

        let arcCenter = CGPoint(x: rect.midX, y: rect.midY)
        let radius = (rect.width - smallCircleRadius * 2) / 2.0

        let circleGray = UIColor(red: 218/255.0, green: 218/255.0, blue: 218/255.0, alpha: 1.0)
        circleGray.setStroke()
        fullCirclePath = UIBezierPath(arcCenter: arcCenter, radius: radius, startAngle: 0.0, endAngle:CGFloat.pi * 2, clockwise: true)
        fullCirclePath.lineWidth = strokeWidth
        fullCirclePath.fill()
        fullCirclePath.stroke()

        let circleRed = UIColor(red: 181/255.0, green: 23/255.0, blue: 65/255.0, alpha: 1.0)
        circleRed.setStroke()
        let arcPath = UIBezierPath(arcCenter: arcCenter, radius: radius, startAngle: 0.0, endAngle:CGFloat.pi * 2 * CGFloat(percentage), clockwise: true)
        arcPath.fill()
        arcPath.stroke()
        arcPath.lineWidth = strokeWidth

        if !drawEndPoint { return }

        let smallCirclePath = UIBezierPath(arcCenter: arcPath.currentPoint, radius: smallCircleRadius, startAngle: 0.0, endAngle:CGFloat.pi * 2, clockwise: true)
        circleRed.setFill()
        smallCirclePath.fill()
        smallCirclePath.stroke()

        self.transform = CGAffineTransform(rotationAngle: (-90).degreesToRadians)
    }

这将按照 percentage . 问题是我需要允许用户通过在uibezierpath上点击/清除来控制这个百分比-

到目前为止,我得到的结果是水龙头是否在更大的圆圈内:

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let touch = touches.first {
            let currentPoint = touch.location(in: self)
            // do something with your currentPoint

            if(fullCirclePath.contains(currentPoint))
            {
                print("CONTAINS!: ", currentPoint)
                //percentage = 0.5
            }
        }
    }

如何从这个cgpoint中得到水龙头沿着路径的大圆圈的百分比?

我试过的:

重写func touchesStarted(u touches:set,with event:uievent?){ 如果让触摸=触摸。首先{ 设currentpoint=touch.location(in:self) //使用当前点

    //print(fullCirclePath.cgPath.cen)
    if(fullCirclePath.contains(currentPoint))
    {

        touchAngle = atan2((currentPoint.x-arcCenter.x), (currentPoint.y-arcCenter.y))
        percentage = Float(touchAngle * 100)/Float(M_PI * 2)
        print("CONTAINS!: ", currentPoint, "Angle: ", touchAngle.radiansToDegrees, " Percent: ", percentage)

        if(AudioPlayerManager.shared.isPlaying())
        {
            AudioPlayerManager.shared.seek(toProgress: percentage)
        }
    }
}

}