我正在使用Xcode上的一个项目，使用SnapKit，不使用故事板。我没有接触AppDelegate。我在SceneDelegate上有这个代码。

import UIKit
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
    var window: UIWindow?
    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        guard let windowScene = (scene as? UIWindowScene) else { return }
        window = UIWindow(windowScene: windowScene)
        window?.makeKeyAndVisible()
        window?.rootViewController = TabBarController()
    }
}

字符串
项目的层次结构是这样的：

• 首页（集团）

1. TabBarController
2. ViewController
   1.首页收藏视图单元格

• ShopPage（Group）.
• MessagePage（Group）.
• 个人资料页（集团）

1. ProfileViewController
   1.设置视图控制器
   我想在点击settingsButton（在ProfileViewController上）时打开SettingsViewController。
   这是我在TabBarController中的代码：

import UIKit
class TabBarController: UITabBarController {
    override func viewDidLoad() {
        super.viewDidLoad()
        self.setupTabs()
        selectedIndex = 3
        tabBar.backgroundColor = .systemBackground
        tabBar.tintColor = UIColor(red: 0, green: 155/255, blue: 247/255, alpha: 1)
    }
    
    //MARK: - Tab Setup
    private func setupTabs(){
        let home = self.createNav(title: "Home", image: UIImage(systemName: "house"), vc: ViewController())
        let shop = self.createNav(title: "Shop", image: UIImage(systemName: "bag"), vc: ShopViewController())
        let message = self.createNav(title: "Message", image: UIImage(systemName: "ellipsis.message"), vc: MessageViewController())
        let profile = self.createNav(title: "Profile", image: UIImage(systemName: "person"), vc: ProfileViewController())
        self.setViewControllers([home, shop, message, profile], animated: true)
    }
    
    private func createNav(title: String, image: UIImage?, vc: UIViewController) -> UINavigationController{
        let nav = UINavigationController(rootViewController: vc)
        nav.tabBarItem.title = title
        nav.tabBarItem.image = image
        return nav
    }
}

型
这是我在ProfileViewController中的代码：

class ProfileViewController: UIViewController {
    private lazy var settingButton: UIButton = {
        let button = UIButton()
        button.setImage(UIImage(systemName: "gearshape"), for: .normal)
        button.addTarget(self, action: #selector(openSettings), for: .touchUpInside)
        return button
    }()
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = UIColor(red: 250/255, green: 250/255, blue: 250/255, alpha: 1)
        setupUI()
    }
    
    @objc private func openSettings() {
        let settingsViewController = SettingsViewController()
        navigationController?.pushViewController(settingsViewController, animated: true)
    }
}
private extension ProfileViewController {
    func setupUI() {
        setupViews()
        setupConstraints()
    }
    
    func setupViews() {
        view.addSubview(settingButton)
    }
    
    func setupConstraints() {
        settingButton.snp.makeConstraints { make in
            make.center.equalToSuperview()
        }
    }
}

型
但当我点击设置按钮什么也没发生。
我尝试在场景委托上设置rootViewController：window?.rootViewController = UINavigationController(rootViewController: TabBarController())
我还尝试在这里设置ProfileViewController作为rootViewController
我也尝试了现在的方法：

@objc private func openSettings() {
    let settingsViewController = SettingsViewController()
    present(settingsViewController, animated: true)
}

型

编辑

对不起，我以为这部分代码与我的问题无关，没有提供给你。我的代码是这样的：

class ProfileViewController: UIViewController {
    private lazy var topView: UIView = {
        let view = UIView()
        return view
    }()
    
    private lazy var topTitle: UILabel = {
        let label = UILabel()
        label.text = "Profile"
        label.font = UIFont.boldSystemFont(ofSize: 19)
        return label
    }()
    
    private lazy var settingButton: UIButton = {
        let button = UIButton()
        button.setImage(UIImage(systemName: "gearshape"), for: .normal)
        button.addTarget(self, action: #selector(openSettings), for: .touchUpInside)
        return button
    }()
    override func viewDidLoad() {
        super.viewDidLoad()
        setupUI()
    }
    
    @objc private func openSettings() {
        print("button")
        let settingsViewController = SettingsViewController()
        navigationController?.pushViewController(settingsViewController, animated: true)
    }
}
// MARK: - setting iui methods
private extension ProfileViewController {
    func setupUI() {
        setupViews()
        setupConstraints()
        view.backgroundColor = .systemBackground
    }
    
    func setupViews() {
        view.addSubview(topView)
        topView.addSubview(topTitle)
        topView.addSubview(settingButton)
    }
    
    func setupConstraints() {
        topView.snp.makeConstraints { make in
            make.top.equalToSuperview().offset(50)
            make.leading.trailing.equalToSuperview()
            make.height.equalToSuperview().multipliedBy(0.08)
        }
        
        topTitle.snp.makeConstraints { make in
            make.center.equalToSuperview()
        }
        
        settingButton.snp.makeConstraints { make in
            make.trailing.equalToSuperview().offset(-10)
            make.height.equalToSuperview().multipliedBy(0.4)
            make.width.equalToSuperview().multipliedBy(0.15)
            make.centerY.equalToSuperview()
        }
    }
}

型
但事实证明，问题是在顶视图，但我不知道确切的原因。如果我的按钮是在顶视图它没有按下，但如果外面那么一切正常。