从AppKit NSButton打开新的SwiftUI窗口

import Cocoa
import SwiftUI

@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
    
    var window: NSWindow!
    
    func applicationDidFinishLaunching(_ aNotification: Notification) {
        // 创建主窗口
        window = NSWindow(contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
                          styleMask: [.titled, .closable, .miniaturizable, .resizable, .fullSizeContentView],
                          backing: .buffered, defer: false)
        window.center()
        window.setFrameAutosaveName("Main Window")
        
        // 创建一个按钮
        let button = NSButton(frame: NSRect(x: 20, y: 20, width: 100, height: 30))
        button.title = "打开窗口"
        button.bezelStyle = .rounded
        button.target = self
        button.action = #selector(openSwiftUIWindow)
        
        // 添加按钮到主窗口的内容视图
        window.contentView?.addSubview(button)
        
        // 显示主窗口
        window.makeKeyAndOrderFront(nil)
    }
    
    @objc func openSwiftUIWindow() {
        // 创建一个 SwiftUI 窗口
        let swiftUIWindow = NSWindow(
            contentRect: NSRect(x: 0, y: 0, width: 480, height: 300),
            styleMask: [.titled, .closable, .miniaturizable, .resizable],
            backing: .buffered, defer: false)
        
        // 创建一个 SwiftUI 视图
        let swiftUIView = ContentView()
        
        // 将 SwiftUI 视图设置为窗口的根视图
        swiftUIWindow.contentView = NSHostingView(rootView: swiftUIView)
        
        // 显示 SwiftUI 窗口
        swiftUIWindow.makeKeyAndOrderFront(nil)
    }
}

struct ContentView: View {
    var body: some View {
        Text("Hello SwiftUI Window!")
            .font(.title)
            .padding()
    }
}