Code for making image's orientation as .up

NormalizingOrientation.swift

func imageByNormalizingOrientation() -> UIImage {
    if imageOrientation == .up {
        return self
    }
    UIGraphicsBeginImageContextWithOptions(size, false, scale)
    draw(in: CGRect(origin: CGPoint.zero, size: size))
    let normalizedImage: UIImage? = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return normalizedImage!
}