UIImage from camera is rotated 90 degrees - using extensions - ios

Question

When Image data is returned and applied to a UIImage, if the data comes from the camera then the image appears rotated 90 degrees.
I tried adding the
extension UIImage {
func correctlyOrientedImage() -> UIImage {
if self.imageOrientation == UIImageOrientation.up {
return self
}
UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)
self.draw(in: CGRect(origin: CGPoint(x: 0,y :0), size: CGSize(width: self.size.width, height: self.size.height))
)
let normalizedImage:UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext();
return normalizedImage;
}
}
in my code, I check to see if I have data saved for a specific user and if so I load the image data into profile_image, a UIImageView.
//profile_image
if let profile_imager = UserDefaults.standard.object(forKey: String(UserID)) as? Data {
let data = UserDefaults.standard.object(forKey: String(UserID)) as? Data
print("profile_imager: \(profile_imager)")
profile_image.image = UIImage(data: data!)
profile_image.backgroundColor = .white
}
How would I go about to use correctlyOrientedImage correctly
Thank you

Answer 1

Swift 4.2,
Created an UIImage extension to keep the image in the original position,
extension UIImage {
func fixedOrientation() -> UIImage {
if imageOrientation == .up {
return self
}
var transform: CGAffineTransform = CGAffineTransform.identity
switch imageOrientation {
case .down, .downMirrored:
transform = transform.translatedBy(x: size.width, y: size.height)
transform = transform.rotated(by: CGFloat.pi)
case .left, .leftMirrored:
transform = transform.translatedBy(x: size.width, y: 0)
transform = transform.rotated(by: CGFloat.pi / 2)
case .right, .rightMirrored:
transform = transform.translatedBy(x: 0, y: size.height)
transform = transform.rotated(by: CGFloat.pi / -2)
case .up, .upMirrored:
break
}
switch imageOrientation {
case .upMirrored, .downMirrored:
transform.translatedBy(x: size.width, y: 0)
transform.scaledBy(x: -1, y: 1)
case .leftMirrored, .rightMirrored:
transform.translatedBy(x: size.height, y: 0)
transform.scaledBy(x: -1, y: 1)
case .up, .down, .left, .right:
break
}
if let cgImage = self.cgImage, let colorSpace = cgImage.colorSpace,
let ctx: CGContext = CGContext(data: nil, width: Int(size.width), height: Int(size.height), bitsPerComponent: cgImage.bitsPerComponent, bytesPerRow: 0, space: colorSpace, bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue) {
ctx.concatenate(transform)
switch imageOrientation {
case .left, .leftMirrored, .right, .rightMirrored:
ctx.draw(cgImage, in: CGRect(x: 0, y: 0, width: size.height, height: size.width))
default:
ctx.draw(cgImage, in: CGRect(x: 0, y: 0, width: size.width, height: size.height))
}
if let ctxImage: CGImage = ctx.makeImage() {
return UIImage(cgImage: ctxImage)
} else {
return self
}
} else {
return self
}
}
}
Then set profile_image from fixedOrientation() method,
//profile_image
if let profile_imager = UserDefaults.standard.object(forKey: String(UserID)) as? Data {
let data = UserDefaults.standard.object(forKey: String(UserID)) as? Data
print("profile_imager: \(profile_imager)")
let actualImage = UIImage(data: data!)?.fixedOrientation()
profile_image.image = actualImage
profile_image.backgroundColor = .white
}