Swift 如何使 onKeyPress 与 TextField 快速配合使用

实现Markdown文本编辑器.

每行文本都是一个TextField.

需要切换?和?上的线路

First attempt:个

TextField(...)
 .onKeyPress(.downArrow) {
    print("down")
    return .handled
 }

此事件永远不会触发

Second attempt:个

import SwiftUI

class CustomTextField: NSTextField {
    override public var acceptsFirstResponder: Bool { true }
    
    override func keyDown(with event: NSEvent) {
        print("key down with character: \(String(describing: event.characters)) " )
        super.keyDown(with: event)
    }
}

struct LineEditor: NSViewRepresentable {
    @Binding var text: String
    
    init(_ text: Binding<String>) {
        self._text = text
    }
    
    typealias NSViewType = CustomTextField
    
    func makeNSView(context: Context) -> CustomTextField {
        let view = CustomTextField(string: text)
        view.delegate = context.coordinator
        return view
    }
    
    func updateNSView(_ nsView: CustomTextField, context: Context) {
        nsView.stringValue = text
    }
    
    class Coordinator: NSObject, NSTextFieldDelegate {
        var parent: LineEditor
        
        init(_ parent: LineEditor) {
            self.parent = parent
        }
        
        func controlTextDidChange(_ obj: Notification) {
            let field = obj.object as! NSTextField
            self.parent.text = field.stringValue
        }
    }
    
    func makeCoordinator() -> Coordinator {
        return Coordinator(self)
    }
}

keyDown也从来不会被称为keyDown.

Question:如何在现代SwiftUI中正确跟踪按键事件？