如何在Cocoa程序中将视图滑入和滑出窗口

import Cocoa

class ViewController: NSViewController {

    @IBOutlet weak var containerView: NSView!
    var targetView: NSView!

    override func viewDidLoad() {
        super.viewDidLoad()

        targetView = NSView(frame: NSRect(x: 0, y: 0, width: 200, height: 200))
        targetView.wantsLayer = true
        targetView.layer?.backgroundColor = NSColor.red.cgColor

        containerView.addSubview(targetView)
    }

    @IBAction func slideIn(_ sender: Any) {
        let animation = NSViewAnimation(viewAnimations: [
            NSViewAnimation.ViewAnimation(targetView: targetView, startingFrame: NSRect(x: -200, y: 0, width: 200, height: 200), endingFrame: NSRect(x: 0, y: 0, width: 200, height: 200))
        ])

        animation.duration = 0.5
        animation.start()
    }

    @IBAction func slideOut(_ sender: Any) {
        let animation = NSViewAnimation(viewAnimations: [
            NSViewAnimation.ViewAnimation(targetView: targetView, startingFrame: NSRect(x: 0, y: 0, width: 200, height: 200), endingFrame: NSRect(x: 200, y: 0, width: 200, height: 200))
        ])

        animation.duration = 0.5
        animation.start()
    }
}