你可以在没有 segue 的情况下更改视图控制器吗？

Question

基本上我有一个改变标题的按钮，如果按钮标题是什么我希望按钮将用户带到不同的地方，如果按钮标题是别的东西

let act1 = act1ViewController()
let act2 = act2ViewController()

override func viewDidLoad() {
    super.viewDidLoad()

    self.buttonName.setTitle(self.text, for: .normal)
    // Do any additional setup after loading the view.
}

@IBAction func buttonPressed(_ sender: UIButton) {

   if text == "cheer up" {
    self.present(act1, animated: true, completion: nil)

}
   else if text == "yay" {
    self.present(act2, animated: true, completion: nil)
    }

}

Answer 1

根据 if 检查实例化 ViewController，并呈现它：

let storyBoard: UIStoryboard = UIStoryboard(name: "MyStoryboard", bundle: nil)
let destinationVC = storyBoard.instantiateViewController(withIdentifier: "ViewControllerIdentifier") as! NewViewController
present(destinationVC, animated: true, completion: nil)

只记得在情节提要中设置标识符

Answer 2

如果您要显示的 2 个控制器是，

class Act1ViewController: UIViewController {
    //your code...
}

class Act2ViewController: UIViewController {
    //your code...
}

您只需在buttonName'stitle 上放置一个switch-case 并显示相关的控制器act1 或act2。使用storyboard 创建act1 和act2。

@IBAction func buttonPressed(_ sender: UIButton) {
    switch sender.titleLabel?.text {
    case "cheer up":
        if let act1 = self.storyboard?.instantiateViewController(withIdentifier: "Act1ViewController") as? Act1ViewController {
            self.present(act1, animated: true, completion: nil)
        }

    case "yay":
        if let act2 = self.storyboard?.instantiateViewController(withIdentifier: "Act2ViewController") as? Act2ViewController {
            self.present(act2, animated: true, completion: nil)
        }

    default:
        break
    }
}

}

不要忘记将Act1ViewController 和Act2ViewController 设置为storyboard 中各自控制器的storyboardID。