在标签栏中添加按钮 - 具有模糊背景的小模态

Question

我正在尝试在我的标签栏控制器中添加一个添加按钮，单击此按钮将显示一个表视图模式。我希望模态小于全屏，背景视图模糊。任何人都可以帮我这个吗？

相关代码如下：

的AppDelegate

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, UITabBarControllerDelegate {

    var window: UIWindow?


    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        return tue
    }

    func tabBarController(_ tabBarController: UITabBarController, shouldSelect viewController: UIViewController) -> Bool {
        if viewController is AddViewController {
            if let newVC = tabBarController.storyboard?.instantiateViewController(withIdentifier: "AddModal"){
                tabBarController.present(newVC, animated: true)
                return false
            }
        }
        return true
    }

}

模态视图控制器：

class AddViewController: UIViewController {

    var list = [
        "item1",
        "item2",
        "item3",
        "item4"
    ]

    var text: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view = UITableView(frame: .zero)

        tableView.delegate = self
        tableView.dataSource = self

        self.tableView.register(UITableViewCell.self, forCellReuseIdentifier: "Cell")

    }

}

extension AddViewController {
    private var tableView: UITableView {
        return self.view as! UITableView
    }
}

extension AddViewController: UITableViewDataSource, UITableViewDelegate {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return list.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
        cell.textLabel?.text = list[indexPath.row]
        return cell
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        self.tabBarController?.dismiss(animated: false, completion: {
            return
        })
    }

}