macOS Compatibility

[duncangroenewald]

Description

This library looks interesting but I don't see any mention of compatibility with AppKit, particularly for observing changes and updating AppKit user interface elements.

The examples provided appear to be using UIKit APIs such as NSDiffableDataSourceSnapshot.

Perhaps a simple example of updating NSTableView or NSOutlineView from within NSViewController could be provided.

Checklist

• I have determined whether this bug is also reproducible in a vanilla SwiftUI project.
• I have determined whether this bug is also reproducible in a vanilla GRDB project.
• If possible, I've reproduced the issue using the main branch of this package.
• This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

Updated AppKit code example

Actual behavior

Updated AppKit code example

Reproducing project

Updated AppKit code example

SQLiteData version information

No response

Sharing version information

No response

GRDB version information

No response

Destination operating system

No response

Xcode version information

No response

Swift Compiler version information

[mbrandonw]

Hi @duncangroenewald, while we don't have an AppKit example, we do have a UIKit example that shows how to power a UICollectionView from a @FetchAll:

sqlite-data/Examples/CaseStudies/UIKitDemo.swift

Lines 76 to 82 in ba32f0b

	observe { [weak self] in
	guard let self else { return }
	var snapshot = NSDiffableDataSourceSnapshot<Section, Fact>()
	snapshot.appendSections([.facts])
	snapshot.appendItems(facts, toSection: .facts)
	dataSource.apply(snapshot, animatingDifferences: true)
	}

In short, you use observe with a trailing closure, and in that closure you are free to access any state that is modeled as @FetchAll, @FetchOne or @Fetch (and more generally, anything that is @Observable). Then when that state changes the trailing closure will be invoked again and that gives you a chance to update your view/controller. In the case of the above code we recompute the data source and apply the snapshot to the collection view.

If you have any concrete questions about integrating with AppKit we will be happy to look into it more and discuss with you.

Also, since this isn't an issue with the library I am going to convert it to a discussion. Please feel free to continue the conversation over there!