CODEWITHSUNDEEP
swift
quantumpotato
quantumpotato

Reputation: 9767

Use of undeclared type "myClass" when dynamically creating view controllers

I am wanting to get a myClass value assigned with a type, then instantiate that from the storyboard.

func detailViewControllerClasses(index: Int) -> UIViewController {
        let myClass = [CollectionViewController().self, CollectionViewController().self, CollectionViewController().self, CollectionViewController().self][index]


        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        guard let vc = storyboard.instantiateViewController(withIdentifier: "CollectionViewController") as? myClass else {
            fatalError("Unable to instatiate a ViewController from the storyboard.")
        }
    }

on the guard let line the compiler says "undeclared variable myClass". I declared it a few lines up with no errors or warnings. Why is this error happening?

Upvotes: 0

Views: 99

Answers (1)

tgyhlsb
tgyhlsb

Reputation: 1915

You instantiate your CollectionViewControllers before accessing .self. Therefore you are not creating an array of class but an array of instances. Remove the ()

func detailViewControllerClasses(index: Int) -> UIViewController {
    let myClass = [CollectionViewController.self, CollectionViewController.self, CollectionViewController.self, CollectionViewController.self][index]


    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    guard let vc = storyboard.instantiateViewController(withIdentifier: "CollectionViewController") as? myClass else {
        fatalError("Unable to instatiate a ViewController from the storyboard.")
    }
}

Upvotes: 1

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