Programmatically initialize ViewController

Question

I am trying to initialise a UIViewController in my Swift application but I am facing a problem to which I cannot find any definitive answer.

I would like to call this from a FlowCoordinator to initialise the controller, but my initialiser requires a NSCoder object due to the required init?(coder: NSCoder) function.


MyAwesomeController()

Is there a way to initialise differently the controller, without the need to pass the NSCoder object?

If there is not, how can I create such an object in a way to avoid the following exception:

'NSInvalidArgumentException', reason: '*** -decodeObjectForKey: cannot be sent to an abstract object of class NSCoder: Create a concrete instance!'

Thank you very much in advance

You might want to read this: programmingios.net/dont-make-a-new-instance-by-mistake-2 — matt
Thank you @matt, you solved my problem, I didn't get before that I was creating a new controller, not the one I had already linked to the storyboard. — modusT
You are welcome! Those articles are meant to help with common problems like this. So I'm very happy if I helped you "get" this concept. — matt

J. Doe J. Doe · Accepted Answer · 2019-05-11T12:23:02

Use something like this, I included a property also as a demo:

class MyAwesomeViewController: UIViewController {
    let someInt: Int

    init(someInt: Int) {
        self.someInt = someInt

        super.init(nibName: nil, bundle: nil)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("Storyboard are a pain")
    }
}

I like creating everything programmatically.

Programmatically initialize ViewController

2 Answers