A Boolean value that determines whether your app receives detailed change information for the objects in the fetch result.
- iOS 8+
- macOS 10.13+
- Mac Catalyst 13.0+
- tvOS 10+
If you have registered a change observer with the shared
PHPhoto object, fetching assets or collections automatically registers your observer to receive information about later changes to the fetch result and about the objects it contains. For a fetch result, change information (a
PHFetch object) can include a detailed list of incremental differences from the previous state of the fetch result, such as new photos captured since the original fetch.
true (the default), Photos sends detailed incremental changes when such information is available. If
false, Photos tells your app only when the fetch result has changed (in which case you can perform the fetch again to receive updated results).