在使用Mac OS X Cocoa绘制文本时,如何重现插入文本样式？

import Cocoa

class MyView: NSView {
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)

        // 创建一个NSAttributedString
        let attributedString = NSAttributedString(string: "Hello, World!", attributes: [
            .font: NSFont.systemFont(ofSize: 24),
            .foregroundColor: NSColor.blue,
            .underlineStyle: NSUnderlineStyle.single.rawValue
        ])

        // 计算文本的大小
        let size = attributedString.size()

        // 计算文本的位置
        let x = (bounds.width - size.width) / 2
        let y = (bounds.height - size.height) / 2

        // 绘制文本
        attributedString.draw(at: NSPoint(x: x, y: y))
    }
}

class AppDelegate: NSObject, NSApplicationDelegate {
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        let window = NSApplication.shared.windows.first!
        let myView = MyView(frame: window.contentView!.bounds)
        window.contentView!.addSubview(myView)
    }
}