Issue with NSOutlineView Selection Not Updating Correctly in macOS 13.6
I'm upgrading from an older version and I can't seem to get Can someone help me understand I'm currently facing an issue where the selection of my `NSOutlineView` is not updating correctly when the data source changes in my macOS 13.6 application..... I have a custom data model that reflects a hierarchical structure, and I'm using `NSTreeController` to manage the data. The selection seems to get out of sync, especially after expanding or collapsing nodes. I’ve checked my bindings and they appear to be correctly set. Here’s a snippet of the code that manages the outline view selection: ```swift @IBOutlet weak var outlineView: NSOutlineView! @IBOutlet weak var treeController: NSTreeController! @IBAction func refreshData(_ sender: Any) { // Logic to refresh the data model treeController.fetch() // This should refresh the data outlineView.reloadData() // Reload the outline view } ``` After calling `fetch()` and `reloadData()`, I expect the selection to reset correctly, but it doesn’t. I also tried manually setting the selected row after the reload like this: ```swift if let selectedItem = treeController.selectedObjects.first { outlineView.selectRowIndexes(IndexSet(integer: outlineView.row(for: selectedItem)), byExtendingSelection: false) } ``` However, it sometimes results in odd behavior where the selection appears visually, but the associated data doesn’t match what’s displayed. I also checked for any potential delegate methods like `outlineViewSelectionDidChange(_:)`, but they don’t seem to fire as expected. Could there be an issue with how I’m handling the data source updates, or is there something specific to `NSOutlineView` in macOS 13.6 that I might be overlooking? Any insights on ensuring the selection state stays in sync would be greatly appreciated! My development environment is Windows. Is there a simpler solution I'm overlooking? I'm developing on Ubuntu 22.04 with Swift. Has anyone else encountered this?