A key whose value is an error that occurred when Photos attempted to load the image.
- iOS 8.0+
- macOS 10.13+
- tvOS 10.0+
This key provides information about an image loading result in the
result block for methods listed in Requesting Images. The corresponding value is an
NSError object.Photos provides an error object for this key if it cannot provide an image for your handler block’s
result parameter. Examine the error object for information about the cause of the error.