Swift Gaussian Blur UIImage

gistfile1.txt

func blurImage(_ image: UIImage, forRect rect: CGRect, radius: Float) -> UIImage? {

    let context = CIContext(options: nil)
    let inputImage = CIImage(cgImage: image.cgImage!)

    guard let filter = CIFilter(name: "CIGaussianBlur") else {
        return nil
    }

    filter.setValue(inputImage, forKey: kCIInputImageKey)
    filter.setValue(radius, forKey: kCIInputRadiusKey)

    guard let outputImage = filter.outputImage else {
        return nil
    }

    let rect = CGRect(origin: .zero, size: image.size)
    guard let cgImage = context.createCGImage(outputImage, from: rect) else {
        return nil
    }

    return UIImage(cgImage: cgImage)
}