Optional chaining inside closure

gistfile1.swift

// http://stackoverflow.com/questions/29365781/weird-behavious-using-optionals-inside-closure

struct GameSettings {}

protocol Delegate {
    func didFinishSettings(settings: GameSettings, controller: Controller)
}

class Controller {
    
    init() {}
    
    var delegate: Delegate?

    func setUpSettingsForNextGame(
        successCompletion:(settings:GameSettings)->Void)
    {}
    
    func f2() {
        setUpSettingsForNextGame {[weak self] (settings:GameSettings) in
            if let delegate = self?.delegate {
                delegate.didFinishSettings(settings, controller:self!)
            }
        }
    }
    
    func f1() {
        setUpSettingsForNextGame {[weak self] (settings:GameSettings) in
                self?.delegate?.didFinishSettings(settings, controller:self!)
        }
    }
    
}