how can I find focal length of iPhone camera lens. I already find out lens aperture value by this:- let aperture = currentcamera?.lensAperture
print("Aperture of camera is:-",aperture!)
To do this you need to first take an image from the camera, then read its focal-length property from the Exif data returned. Sample code is given here and copied below for reference:
// delegate method for the image picker
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
let metadata = info[UIImagePickerControllerMediaMetadata] as? NSDictionary
let exifdata = metadata!["{Exif}"] as! NSDictionary
// focal length
let focalLength = exifdata["FocalLength"] as! Double
print("Focal length \(focalLength)")
}
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