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CGContextSetStrokeColorWithColor: invalid context 0x0 error in swift about abgaugeviewkit HOT 1 CLOSED

ajaybhanushali commented on September 25, 2024

CGContextSetStrokeColorWithColor: invalid context 0x0 error in swift

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Comments (1)

pankti28 commented on September 25, 2024

Solution:

strokeColor.setStroke()
path.stroke()

These two lines caused the error.

Apparently, You can't do any of those things, in Objective-C or in Swift, unless you are in a graphics context (e.g. drawRect: or UIGraphicsBeginImageContext).

so instead use CAShapeLayer

func createArcWith(startAngle: CGFloat, endAngle: CGFloat, arcCap: CGLineCap, strokeColor: UIColor, center:CGPoint) {
       // 1
       let center = center
       let radius: CGFloat = max(bounds.width, bounds.height)/2 - self.frame.width/20
       let lineWidth: CGFloat = self.frame.width/10
       // 2
       let path = UIBezierPath(arcCenter: center,
                               radius: radius,
                               startAngle: startAngle,
                               endAngle: endAngle,
                               clockwise: true)
       // 3
       
      let arcLayer = CAShapeLayer()
       arcLayer.path = path.cgPath
       arcLayer.strokeColor = strokeColor.cgColor
       arcLayer.fillColor = UIColor.clear.cgColor

       arcLayer.lineWidth = lineWidth
       layer.addSublayer(arcLayer)
   }

from abgaugeviewkit.

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