addAttachment never returns

Question

What can cause addAttachment to never call its completion block? func addImage(_ image: UIImage, toFeature agsArcGISFeature: AGSArcGISFeature, completion: @escaping ((Error?) -> Void)) { agsArcGISFeature.load() { error in if let error = error { completion(error) return } guard let imageData = image.jpegData(compressionQuality: 0.85) else { completion(nil) return } print("Calling addAttachment()") agsArcGISFeature.addAttachment(withName: "image.jpg", contentType: "jpg", data: imageData) { agsAttachment, error in if let error = error { print("addAttachment() completed with error") completion(error) } else { print("addAttachment() completed successfully") completion(nil) } } } } ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ In the above code, neither of the print() statements (lines 16 or 19) ever execute. The feature is a loaded feature from a feature service in ArcGIS Online. I feel like I am missing something simple.

NimeshJarecha · Accepted Answer

I suspect, agsArcGISFeature is getting released before operation completes and callback. To test it, just create a class variable for agsArcGISFeature or add it to a print statement. print("addAttachment() completed successfully for \(agsArcGISFeature)") Hope this helps! Regards, Nimesh