There is no viewcontroller.swift file when I start the project [duplicate]

问题

This question already has answers here:

No main.storyboard or ViewController.swift upon initialization of new project in Xcode? (2 answers)

Closed 4 months ago.

I tried to start the project and play around with viewcontroller but I do not see it. Only appdelegate and scenedelegeate and contentview. The code below was supposed to be added to viewcontroller but I do not know where to add. It keeps giving me a error message saying unresolved identifier present and action. please help.

    @IBAction func hello() {
        // add alert

        let alert = UIAlertController(title: "hello", message: "daaaammmmmn", preferredStyle: .alert)
        let okAction = UIAlertAction(title: "ok", style: .default, handler: nil)
        alert.addAction(action)

        present(alert, animated: true, completion: nil)

}

回答1:

When you created the project, in the User Interface pop-up, you chose SwiftUI.

Choose Storyboard instead.

来源：https://stackoverflow.com/questions/58050723/there-is-no-viewcontroller-swift-file-when-i-start-the-project