iOS17适配指南之UIMenu与UIAction

import UIKit

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()

        showMenuInButton()
    }

    func showMenuInButton() {
        let button = UIButton(type: .custom)
        button.setTitle("显示菜单", for: .normal)
        button.setTitleColor(.systemGreen, for: .normal)
        button.sizeToFit()
        button.center = view.center
        button.menu = createMenu()
        button.showsMenuAsPrimaryAction = true
        view.addSubview(button)
    }

    func createMenu() -> UIMenu {
        // 第1个菜单
        let favorite = UIAction(title: "喜欢",
                                subtitle: "喜欢内容", 
                                image: UIImage(systemName: "heart"),
                                selectedImage: UIImage(systemName: "heart.fill"),
                                identifier: nil,
                                discoverabilityTitle: "",
                                attributes: [.destructive],
                                state: .on) { _ in
            print("favorite")
        }
        // 第2个菜单
        let share = UIAction(title: "分享",
                             image: UIImage(systemName: "square.and.arrow.up"),
                             selectedImage: UIImage(systemName: "square.and.arrow.up.fill")) { _ in
            print("share")
        }
        // 第3个菜单
        let delete = UIAction(title: "删除",
                              subtitle: "删除内容") { _ in
            print("delete")
        }
        let menuElements = [favorite, share, delete]
        let menu = UIMenu(title: "菜单",
                          subtitle: "菜单副标题",
                          image: UIImage(systemName: "filemenu.and.cursorarrow"),
                          identifier: nil,
                          options: [.displayInline, .displayAsPalette], // 显示模式
                          preferredElementSize: .large, 
                          children: menuElements)
        return menu
    }
}