Edit Menu for UITextView

TextEditorView.swift

//
//  TextEditorView.swift
//  SelectableEditorView
//
//  Created by satoutakeshi on 2023/07/15.
//

import SwiftUI
#if canImport(UIKit)
import UIKit
#else
import AppKit
#endif

struct TextEditorView: View {
    @State var editText = "Hello World"
    var body: some View {
        TextEditor(editText: $editText)
            .border(Color.red)
    }
}
#if canImport(UIKit)
struct TextEditor: UIViewRepresentable {
    typealias UIViewType = UITextView
    typealias Coordinator = TextEditCoordinator

    @Binding var editText: String

    func makeUIView(context: Context) -> UITextView {
        let textView = UITextView()
        textView.isSelectable = true
        textView.isEditable = true
        textView.text = editText
        textView.delegate = context.coordinator
        return textView
    }

    func updateUIView(_ uiView: UITextView, context: Context) {}

    func makeCoordinator() -> Coordinator {
        return TextEditCoordinator()
    }
}

final class TextEditCoordinator: NSObject, UITextViewDelegate {
    func textView(_ textView: UITextView, editMenuForTextIn range: NSRange, suggestedActions: [UIMenuElement]) -> UIMenu? {
        let string = NSString(string: textView.text)

        print("selected string is '\(string.substring(with: range))'")

        let customMenu = UIMenu(
            title: "uimenue",
            options: .displayAsPalette,
            children: [
                UIAction(title: "menuItem1") { _ in
                    print("menuItem1")
                },
                UIAction(title: "menuItem2") { _ in
                    print("menuItem2")
                },
                UIAction(title: "menuItem3") { _ in
                    print("menuItem3")
                }
            ]
        )
        return UIMenu(children: suggestedActions + [customMenu])
    }
}
#elseif canImport(AppKit) && !targetEnvironment(macCatalyst)
struct TextEditor: NSViewRepresentable {
    typealias NSViewType = NSTextView
    typealias Coordinator = TextEditCoordinator

    @Binding var editText: String

    func makeNSView(context: Context) -> NSTextView {
        let textView = NSTextView()
        textView.delegate = context.coordinator
        textView.isSelectable = true
        textView.isEditable = true

        return textView
    }

    func updateNSView(_ nsView: NSTextView, context: Context) {}

    func makeCoordinator() -> TextEditCoordinator {
        TextEditCoordinator()
    }
}

final class TextEditCoordinator: NSObject, NSTextViewDelegate {
    func textView(_ view: NSTextView, menu: NSMenu, for event: NSEvent, at charIndex: Int) -> NSMenu? {
        view.textStorage?.string

        let item = NSMenuItem(title: "custome", action: nil, keyEquivalent: "ssss")

        menu.addItem(item)
        return menu
    }
}
#endif