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iOS

Posted by Michael Lee
Michael Lee
2,855 Points

Making a view controller the root view controller in the app delegate file (Swift)

If I wanted to make a view controller, say logInViewController, the root view controller in Objective-C, I would:

Import the view controller, then type out the following lines of code:

LogInViewController *vc = [[LogInViewController alloc] init];

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:vc];

self.window.rootViewController = navigationController;

So how would I do this in Swift?

1 Answer

Michael Hulet
Michael Hulet
47,913 Points

The equivalent syntax in Swift would look like this:

let vc = LoginViewController()
let navigationController = UINavigationController(rootViewController: vc)
window.rootViewController = navigationController
Michael Lee
Michael Lee
2,855 Points

Thanks!

Michael Lee
Michael Lee
2,855 Points

Hey, I've done it as such:

let vc = ViewController()
let navigationController = UINavigationController(rootViewController: vc)
self.window?.rootViewController = navigationController
self.window!.makeKeyAndVisible()
navigationController.setNavigationBarHidden(true, animated: false)

However, ViewController still doesn't pop up when I first launch the app, instead getting a plain white screen due to this line of code:

    self.window!.backgroundColor = UIColor.whiteColor()

When deleted, the screen turns to black.

I don't think that the storyboard is set in the info.plist and there's no storyboard file.

Is there any line of code I need to add?

Thanks!