Use a generic class as a custom view in Interface Builder

Question

I have a custom subclass of UIButton:

import UIKit

@IBDesignable
class MyButton: UIButton {

    var array : [String]?

}

It is IBDesignab

Answer 1

I had the same problem as first I wanted to use the following structure :

import UIKit

protocol MyDataObjectProtocol{
   var name:String { get}
}

class MyObjectTypeOne:MyDataObjectProtocol{
    var name:String { get { return "object1"}}
}

class MyObjectTypeTwo:MyDataObjectProtocol{
    var name:String { get { return "object2"}}
}

class SpecializedTableViewControllerOne: GenericTableViewController {
}

class SpecializedTableViewControllerTwo: GenericTableViewController {
}

class GenericTableViewController: UITableViewController {
    // some common code I don't want to be duplicated in 
    // SpecializedTableViewControllerOne and SpecializedTableViewControllerTwo
    // and that uses object of type MyDataObjectProtocol.
}

But as explained in the previous answer, this is not possible. So I managed to work it around with the following code :

import UIKit

protocol MyDataObjectProtocol{
    var name:String { get}
}

class MyObjectTypeOne:MyDataObjectProtocol{
    var name:String { get { return "object1"}}
}

class MyObjectTypeTwo:MyDataObjectProtocol{
    var name:String { get { return "object2"}}
}

class SpecializedTableViewControllerOne: GenericTableViewController {
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        super.object = MyObjectTypeOne()
    }
}

class SpecializedTableViewControllerTwo: GenericTableViewController {
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        super.object = MyObjectTypeTwo()
    }
}

class GenericTableViewController : UITableViewController {
    var object : MyDataObjectProtocol?

    @IBOutlet weak var label: UILabel!

    override func viewDidLoad() {
        label.text = object?.name
    }


    // some common code I don't want to be duplicated in 
    // SpecializedTableViewControllerOne and SpecializedTableViewControllerTwo
    // and that uses object of type MyDataObjectProtocol.
}

Now my label outlet displays "object1" when I link the SpecializedTableViewControllerOne as a custom class of my view controller in the storyboard and "object2" if I link to SpecializedTableViewControllerTwo