swift - NavigationBar 右侧项目在显示内部 ViewController 时隐藏

Question

我将导航栏与 tabbarcontroller 一起使用。当我按下其中一个选项卡时，我的导航栏右侧项目会自动隐藏。

如何将我的项目移动到子 Controller ？

Answer 1

您可以创建基础 View Controller 并从基础 View Controller 继承您的子类，然后调用 super.viewDidLoad()

1- 基地 Controller

class BaseViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let myButton = UIBarButtonItem(title: "LogOut", style: .done, target: self, action: #selector(self.logoutTapped(_:)))
        self.navigationItem.rightBarButtonItem = myButton
    }

    @objc func logoutTapped(_ sender: UIBarButtonItem) {

        print("Logout clicked :) ")
    }
}

2-风投一

class ViewController: BaseViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

}

3- VC 二

class ViewController2: BaseViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

}

结果