大纲视图填充核心数据

Question

我想为macOS创建一个带有swift 3的NSOutlineView。 因此我找到了一个youtube教程，它带给我这个好结果：

但此大纲视图的数据是静态的。 现在我想用核心数据中的数据填充大纲视图。

我知道核心数据，我知道如何从中获取数据。 但我不知道如何将它动态填充到大纲视图中。

这是我目前的代码：

ViewController.swift

import Cocoa

class ViewController: NSViewController, NSOutlineViewDataSource, NSOutlineViewDelegate {

    @IBOutlet var treeController: NSTreeController!
    @IBOutlet weak var outlineView: NSOutlineView!
    override func viewDidLoad() {
        super.viewDidLoad()
        addData()
    }

    func addData() {
        let root: [String : Any] = [ "name": "Max Mustermann", "isLeaf": false ]
        let dict: NSMutableDictionary = NSMutableDictionary(dictionary: root)
        dict.setObject([Test()], forKey: "children" as NSCopying)

        treeController.addObject(dict)
    }
    func isHeader(item: AnyObject) -> Bool {
        if let item = item as? NSTreeNode {
            return !(item.representedObject is Test)
        } else {
            return !(item is Test)
        }
    }
    func outlineView(_ outlineView: NSOutlineView, viewFor tableColumn: NSTableColumn?, item: Any) -> NSView? {
        if isHeader(item: item as AnyObject) {
            return outlineView.make(withIdentifier: "HeaderCell", owner: self)
        } else {
            return outlineView.make(withIdentifier: "DataCell", owner: self)
        }
    }


}

Playlist.swift 导入Cocoa

class Playlist: NSObject {

dynamic var name: String = "New Playlist"

func isLeaf() -> Bool {
return true
    }

}

我希望你能帮助我:)。

var result = [Test]()

        let appdelegate = NSApplication.shared().delegate as! AppDelegate
        let context = appdelegate.persistentContainer.viewContext
        let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Test")

        do {
            result = try context.fetch(request) as! [Test]
        } catch { }