NSCollectionView :如何防止右键选择？

class CustomCollectionViewItem: NSCollectionViewItem {
    override func mouseDown(with event: NSEvent) {
        if event.type == .rightMouseDown {
            // 忽略右键点击事件
            return
        }
        super.mouseDown(with: event)
    }
}

class ViewController: NSViewController, NSCollectionViewDelegate {
    // ...

    func collectionView(_ collectionView: NSCollectionView, viewForSupplementaryElementOfKind kind: NSCollectionView.SupplementaryElementKind, at indexPath: IndexPath) -> NSView {
        // 创建自定义的NSView子类作为视图
        let itemView = collectionView.makeSupplementaryView(ofKind: kind, withIdentifier: NSUserInterfaceItemIdentifier(rawValue: "CustomView"), for: indexPath) as! CustomCollectionViewItem
        return itemView.view
    }

    func collectionView(_ collectionView: NSCollectionView, shouldSelectItemsAt indexPaths: Set<IndexPath>) -> Set<IndexPath> {
        // 根据需要判断是否允许选择特定的项
        // 如果不希望右键选择，可以返回一个空的IndexPath集合
        return []
    }

    // ...
}