Delegation 3: Delegation

delegation.swift

class FirstViewController: UIViewController {
    
    private let items : [String] = [ /* some items */]
    private let tableView = UITableView()
    private var delegate : UITableViewDelegate!
    
    /* lots of other methods */
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        delegate = GoToDetailsDelegate(controller: navigationController!, items: items)
        tableView.delegate = delegate
    }
    
}

class GoToDetailsDelegate: NSObject, UITableViewDelegate {
    
    let controller : UINavigationController
    let items : [String]
    
    init(controller: UINavigationController, items: [String]) {
        self.controller = controller
        self.items = items
    }
    
    func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        let item = items[indexPath.row]
        controller.pushViewController(SecondController(item: item), animated: true)
    }
    
}