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I am experimenting with how to use the Apple Version framework. I created contoured Detection using this tutorial. can I use the points from the version detection to draw lines or shapes on UIView using Core Graphic? I want the drawContours
to return a UIView instead of UIImage
public func drawContours(contoursObservation: VNContoursObservation, sourceImage: CGImage) -> UIView {
let size = CGSize(width: sourceImage.width, height: sourceImage.height)
let renderer = UIGraphicsImageRenderer(size: size)
let renderedImage = renderer.image { (context) in
let renderingContext = context.cgContext
let flipVertical = CGAffineTransform(a: 1, b: 0, c: 0, d: -1, tx: 0, ty: size.height)
renderingContext.concatenate(flipVertical)
renderingContext.draw(sourceImage, in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
renderingContext.scaleBy(x: size.width, y: size.height)
renderingContext.setLineWidth(5.0 / CGFloat(size.width))
let redUIColor = UIColor.red
renderingContext.setStrokeColor(redUIColor.cgColor)
renderingContext.addPath(contoursObservation.normalizedPath)
renderingContext.strokePath()
}
return renderedImage
}
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