CODEWITHSUNDEEP
iosswift
Mary Doe
Mary Doe

Reputation: 1323

Initializing ViewController by passing a View Model

I am trying to initialize a ViewController by passing a View Model as shown below:

import Foundation import UIKit

class ViewController: UIViewController {
    
    private var vm: LoginViewModel
    
    init(vm: LoginViewModel) {
        self.vm = vm
        super.init(nibName: nil, bundle: nil)
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
    }
    
}

The init?(coder: NSCoder) initializer is giving error since the vm property is not initialized. How can I workaround this problem?

Upvotes: 0

Views: 735

Answers (1)

Tad
Tad

Reputation: 947

You can get around the problem by adding a ! to your property. This basically makes it so that you can initialize without setting the property. The property will be nil if you don't assign a value to it.

private var vm: LoginViewModel!

Note that if you initialize via storyboard, you need to make sure you find a way to initialize the property via a segue.

Upvotes: 2

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