Image Metadata from Action Extension - ios

Question

Usually when i want to read some image metadata in iOS i use imagePickerController to choose the image and Photos Framework and imagePickerController:didFinishPickingMediaWithInfo:
to get image info and extract the metadata like this
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
UIImagePickerControllerSourceType pickerType = picker.sourceType;
if(pickerType == UIImagePickerControllerSourceTypePhotoLibrary)
{
NSURL *url = [info objectForKey:UIImagePickerControllerReferenceURL];
PHFetchResult *fetchResult = [PHAsset fetchAssetsWithALAssetURLs:#[url,] options:nil];
PHAsset *asset = fetchResult.firstObject;
[self metaDataFromPhotoLibrary:asset];
[self dismissViewControllerAnimated:YES completion:NULL];
}
}
-(void)metaDataFromPhotoLibrary:(PHAsset*)asset{
// NSLog(#"Start metadata");
PHContentEditingInputRequestOptions *options = [[PHContentEditingInputRequestOptions alloc] init];
options.networkAccessAllowed = YES; //download asset metadata from iCloud if needed
[asset requestContentEditingInputWithOptions:options completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info) {
CIImage *fullImage = [CIImage imageWithContentsOfURL:contentEditingInput.fullSizeImageURL];
NSDictionary *metadata = fullImage.properties;
NSMutableDictionary *imageMetadata = nil;
imageMetadata = [[NSMutableDictionary alloc] initWithDictionary:metadata];
NSString *dateString = metadata [#"{TIFF}"] [#"DateTime"];
NSString *latitude = metadata [#"{GPS}"][#"Latitude"];
NSString *longitude = metadata [#"{GPS}"][#"Longitude"];
//etc etc etc
}
But can't do the same thing from an Action Extension
in the extension code i use a code like this to get the selected image
- (void)viewDidLoad {
[super viewDidLoad];
// Get the item[s] we're handling from the extension context.
// For example, look for an image and place it into an image view.
// Replace this with something appropriate for the type[s] your extension supports.
BOOL imageFound = NO;
for (NSExtensionItem *item in self.extensionContext.inputItems) {
for (NSItemProvider *itemProvider in item.attachments) {
if ([itemProvider hasItemConformingToTypeIdentifier:(NSString *)kUTTypeImage]) {
// This is an image. We'll load it, then place it in our image view.
__weak UIImageView *immagine = self.immagine;
[itemProvider loadItemForTypeIdentifier:(NSString *)kUTTypeImage options:nil completionHandler:^(UIImage *image, NSError *error) {
if(image) {
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[immagine setImage:image];
}];
}
}];
imageFound = YES;
break;
}
}
if (imageFound) {
// We only handle one image, so stop looking for more.
break;
}
}
}
Using UIImagePNGRepresentation or UIImageJPEGRepresentation i lost many metadata and i can read only a few data !
How can i get all image metadata from the image selected from action Extension ?
Thank you so mush
Note: i 've found some app in the AppsStore that read all metadata dictionary from extension , so there must be a solution for my problem !
Thank you again
Vanni