SDKs
- iOS 5.0+
- macOS 10.7+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Framework
- Foundation
Declaration
NSFileCoordinatorWritingForMerging = 1 << 2
Discussion
When this constant is specified, the file coordinator calls the save method of relevant file presenters to give them a chance to save their changes before your code makes its changes.