iOS: How can a custom camera save images always in the right orientation?

Question

I'm currently implementing a custom camera with IOS. I want the camera to save images to album always in the correct direction just like the official iOS camera: no matter in what orientation you hold the camera you can always see the photo save the correct orientation. I checked many source code, they seem to save the image rather arbitrarily with the following:

var image  = UIImage(cgImage: cgImageRef, scale: 1.0, orientation: UIImageOrientation.right)

But this only works when the device is upright Could anyone provide any suggestions?

I also tried to get the orientation

let uiorientation = UIApplication.shared.statusBarOrientation

But it always returns portrait when the screen is portrait locked.

Answer 1

You have to update the image rotation when you get UIImage object. Pass the image that is getting from image picker to this method

Swift

func getNormalizedImage(rawImage: UIImage) -> UIImage {

    if (rawImage.imageOrientation == .up) {
        return rawImage
    }

    UIGraphicsBeginImageContextWithOptions(rawImage.size, false, rawImage.scale)
    rawImage.draw(in: CGRect(x:0, y:0, width:rawImage.size.width, height:rawImage.size.height))

    let normalizedImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return normalizedImage!
}

Objective-C

+(UIImage *)getNormalizedImage:(UIImage *)rawImage {

    if(rawImage.imageOrientation == UIImageOrientationUp)
    return rawImage;

    UIGraphicsBeginImageContextWithOptions(rawImage.size, NO, rawImage.scale);
    [rawImage drawInRect:(CGRect){0, 0, rawImage.size}];
    UIImage *normalizedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return normalizedImage;
}