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I am fetching an image from the photo library and fetch the GPS Location data, but it's not working.
This needs to work on iOS 17 as well, so I used PHPicker. kCGImagePropertyGPSDictionary is always returning nil.
The code I tried:
import CoreLocation
import MobileCoreServices
import PhotosUI
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
@IBOutlet weak var selectedImageView:UIImageView!
@IBAction func selectTheImage() {
self.pickImageFromLibrary_PH()
}
func pickImageFromLibrary_PH() {
var configuration = PHPickerConfiguration(photoLibrary: PHPhotoLibrary.shared())
configuration.filter = .images
let picker = PHPickerViewController(configuration: configuration)
picker.delegate = self
present(picker, animated: true, completion: nil)
}
func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
if let itemProvider = results.first?.itemProvider, itemProvider.canLoadObject(ofClass: UIImage.self) {
itemProvider.loadObject(ofClass: UIImage.self) { (image, error) in
if let image = image as? UIImage {
self.fetchLocation(for: image)
}
}
}
picker.dismiss(animated: true, completion: nil)
}
func fetchLocation(for image: UIImage) {
let locationManager = CLLocationManager()
guard let imageData = image.jpegData(compressionQuality: 1.0) else {
print("Unable to fetch image data.")
return
}
guard let source = CGImageSourceCreateWithData(imageData as CFData, nil) else {
print("Unable to create image source.")
return
}
guard let properties = CGImageSourceCopyPropertiesAtIndex(source, 0, nil) as? [String: Any] else {
print("Unable to fetch image properties.")
return
}
print(properties)
if let gpsInfo = properties[kCGImagePropertyGPSDictionary as String] as? [String: Any],
let latitude = gpsInfo[kCGImagePropertyGPSLatitude as String] as? CLLocationDegrees,
let longitude = gpsInfo[kCGImagePropertyGPSLongitude as String] as? CLLocationDegrees {
let location = CLLocation(latitude: latitude, longitude: longitude)
print("Image was taken at \(location.coordinate.latitude), \(location.coordinate.longitude)")
} else {
print("PHPicker- Location information not found in the image.")
}
}
}
Properties available in that image:
Exif/Meta-Data is available, I expect GPS location data
ColorSpace = 65535;
PixelXDimension = 4032;
PixelYDimension = 3024;
}, "DPIWidth": 72, "Depth": 8, "PixelHeight": 3024, "ColorModel": RGB, "DPIHeight": 72, "{TIFF}": {
Orientation = 1;
ResolutionUnit = 2;
XResolution = 72;
YResolution = 72;
}, "PixelWidth": 4032, "Orientation": 1, "{JFIF}": {
DensityUnit = 0;
JFIFVersion = (
1,
0,
1
);
XDensity = 72;
YDensity = 72;
}]
Note: I'm trying in Xcode 15 and iOS 17.
In photos app location data is available, but in code, it's returning nil.
Posted
by
Ramprasathselvam.
Last updated
Ramprasathselvam.
.