在initWithCoder中添加时，Swift UIGestureRecognizer无法正常工作

Question

我有一个自定义的UIView子类，其中的UI是用xib设计的。

class MyView: UIView {

    override init(frame: CGRect) {
        super.init(frame: frame)
        loadView()
        commonInit()
    }

    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        loadView()
        commonInit()
    }

    func commonInit() {
        let rightSwipeRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipe"))
        rightSwipeRecognizer.direction = .Right
        dayInfoView.addGestureRecognizer(rightSwipeRecognizer)
    }

    func swipe() {
        println("swiped")
    }    

    private func loadView() {
        let mainBundle = NSBundle.mainBundle()
        let views = mainBundle.loadNibNamed("MyView", owner: self, options: nil)
        let view = views.first as? UIView
        addSubview(view!)
    }
}

在我的故事板中，我已经为VC添加了一个视图，并确保在该视图上启用了用户交互。结果：无滑动处理

如果我手动添加我的视图，工作正常：

override func viewDidLoad() {
    super.viewDidLoad()

    let myView = MyViewframe: CGRectMake(0, 300, 320, 200))
    view.addSubview(myView)
}

我做错了什么？