Color of point in UIView

UIView + ColorOfPoint.swift

extension UIView {
    func colorOfPoint(point: CGPoint) -> UIColor {
        let colorSpace: CGColorSpace = CGColorSpaceCreateDeviceRGB()
        let bitmapInfo = CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)
        var pixelData: [UInt8] = [0, 0, 0, 0]
        guard let context = CGContext(data: &pixelData,
                                      width: 1,
                                      height: 1,
                                      bitsPerComponent: 8,
                                      bytesPerRow: 4,
                                      space: colorSpace,
                                      bitmapInfo: bitmapInfo.rawValue) else {
                                        return .white
        }
        
        context.translateBy(x: -point.x, y: -point.y)
        self.layer.render(in: context)
        let red: CGFloat = CGFloat(pixelData[0]) / CGFloat(255.0)
        let green: CGFloat = CGFloat(pixelData[1]) / CGFloat(255.0)
        let blue: CGFloat = CGFloat(pixelData[2]) / CGFloat(255.0)
        let alpha: CGFloat = CGFloat(pixelData[3]) / CGFloat(255.0)
        let color: UIColor = UIColor(red: red, green: green, blue: blue, alpha: alpha)
        return color
    }
}