无法在Swift中的其他ViewController中为ViewController创建实例

Question

I have a viewcontroller with required init?(coder aDecoder: NSCoder) , i want to create instance in other class. here is my code

 class ViewControllerB: UIViewController { @IBOutlet weak var tableview: UITableView! required init?(coder aDecoder: NSCoder) { super.init(coder: aDecoder) }} 

I want to create instance for ViewControllerB in ViewControllerA.

Answer 1

You can fix it in a few ways.

Option 1

let viewController = ViewControllerB(nibName: nil, bundle: nil)

Option 2

Change your ViewControllerB like following.

class ViewControllerB: UIViewController {
    @IBOutlet weak var tableview: UITableView!

    convenience init () {
        self.init(nibName: nil, bundle: nil)
    }
} 

OR

class ViewControllerB: UIViewController {
    @IBOutlet weak var tableview: UITableView!

    required init(coder aDecoder: NSCoder) {
        fatalError("This class does not support NSCoding")
    }
    override init (frame : CGRect) {
        super.init(frame : frame)
    }
    convenience override init () {
        self.init(frame:CGRectZero)
    }
}

And now you can call

let viewController = ViewControllerB()

Answer 2

Do like this

let viewController = ViewControllerB()

This will give the instance of ViewControllerB and then do what you want.