以编程方式打开视图控制器场景(Swift 4)

Question

我想要创建一个基本的iOS应用程序，有两个按钮。点击第一个按钮显示视图控制器1，点击第二个按钮显示视图控制器2。

我怎么能用快速密码来做这件事。

我将第一个按钮连接到根视图控制器上的以下代码：

@IBAction func showViewOneTapped(_ sender: Any) {
    // this is where I need help I think
}

我还为我想要显示的每个视图控制器创建了外壳快速文件。

Answer 1

试试这个-

@IBAction func showViewOneTapped(_ sender: Any) {
        let storyBoard : UIStoryboard = UIStoryboard(name: "YourStoryBoardName", bundle:nil)
        let nextViewController = storyBoard.instantiateViewController(withIdentifier: "YourIdentifierName") as! yourClassname(e.g PhoneNoDropDownViewController)
        self.present(nextViewController, animated:true, completion:nil)
    }


@IBAction func showViewTwoTapped(_ sender: Any) {
            let storyBoard : UIStoryboard = UIStoryboard(name: "YourStoryBoardName", bundle:nil)
            let nextViewController = storyBoard.instantiateViewController(withIdentifier: "YourIdentifierName") as! yourClassname(e.g PhoneNoDropDownViewController)
            self.present(nextViewController, animated:true, completion:nil)
        }

Answer 2

像这样

let vc1 = self.storyboard?.instantiateViewController(withIdentifier: "ViewController1Identifier") as! ViewController1
self.present(vc1, animated: true, completion: nil)

Answer 3

试试这个

let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
    let nextViewController = storyBoard.instantiateViewController(withIdentifier: "Login") as! LoginViewController
    self.present(nextViewController, animated:true, completion:nil)

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