Swift generic variable

Question

I have a protocol, and I\'d like to have a variable of type UIViewController implementing mu protocol. If I try to do something like:

var delegate:UIViewCon         


        

Answer 1

You cannot declare variable type like that in Swift.

The easiest way to solve your problem is adding UIViewController methods/properties to BouncingMenuDelegate requirement:

@objc protocol BouncingMenuDelegate {
    // Delegate methods
    func boudcingMenu(bouncingMenu:BouncingMenu, didSelectItemAtIndex index:Int)

    // required methods/properties from UIViewController 
    var view:UIView { get }
    var navigationController:UINavigationController? { get }
    func presentViewController(viewControllerToPresent: UIViewController, animated flag: Bool, completion: (() -> Void)?)
}

class BouncingMenu:UIView {
    weak var delegate:BouningMenuDelegate?
}

Answer 2

If the class implements a protocol you don't care about which class it actually is. This should work:

var delegate: BouncingMenuDelegate?