Swift 5 编程转场未触发

Question

I am trying to programmatically trigger a segue to a new View Controller based on whether or not a user is logged in. I have based my code on the answer at Performing a completion handler before app launches

I've created a text button with the segue but it never fires. The print("Logged In") line functions, just not the segue. I want my buttons to be disabled to prevent accidental taps, but having it enabled or disabled makes no difference to its firing.

My code in InitialViewController.swift:

override func viewDidLoad() {
    super.viewDidLoad()
    checkLoginStatus()
}

func checkLoginStatus() {
    let defaults = UserDefaults.standard
    let isLoggedIn = defaults.bool(forKey: "loggedIn")

    if (isLoggedIn == true) {
        print("Logged In")
        self.performSegue(withIdentifier: "HomeController", sender: self)
    }

    else {
        print("Not Logged In")
        self.performSegue(withIdentifier: "LoginController", sender: self)
    }
}

Answer 1

You can attach a segue from one view controller to another one in Storyboard this way:

1. Tap and hold right-click from View Controller property to assign it to another view controller inside of your storyboard this way:

2. Choose the type of presentation in Manual Segue section and tap on it:

3. Give an identifier to the newly created segue ("HomeController" or "LoginController" in your case):

4. Remove your old segue that is triggered on a button tap.