调整图片方向

    private func fixOrientation(image: UIImage) -> UIImage {
        if image.imageOrientation == UIImage.Orientation.up {
            return image
        }
        UIGraphicsBeginImageContextWithOptions(image.size, false, image.scale)
        image.draw(in: CGRect(x: 0, y: 0, width: image.size.width, height: image.size.height))
        let normalizedImage: UIImage = UIGraphicsGetImageFromCurrentImageContext() ?? UIImage()
        UIGraphicsEndImageContext()
        return normalizedImage
    }