iOS 8 Photos framework. Access photo metadata

Question

I\'m looking at replacing ALAssetsLibrary with Photos framework in my app.

I can retrieve photos, collections, and asset sources just fine (even write t

Answer 1

If you request a content editing input, you can get the full image as a CIImage, and CIImage has a property titled properties which is a dictionary containing the image metadata.

Sample Swift Code:

let options = PHContentEditingInputRequestOptions()
options.networkAccessAllowed = true //download asset metadata from iCloud if needed

asset.requestContentEditingInputWithOptions(options) { (contentEditingInput: PHContentEditingInput?, _) -> Void in
    let fullImage = CIImage(contentsOfURL: contentEditingInput!.fullSizeImageURL)

    print(fullImage.properties)
}

Sample Objective-C Code:

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];

    NSLog(@"%@", fullImage.properties.description);
}];

You'll get the desired {Exif}, {TIFF}, {GPS}, etc dictionaries.