Swift協議委派不起作用

Question

我有一個viewController ，其中有一個containerView和pageView 。 當我從pageView滑動視圖后，我想在viewController中調用一個函數，在下面的代碼中進行了嘗試，但是它正在調用buttonMaskColor請問我的問題在哪里？

class PlaceMenuDetailsViewController: UIViewController, PageViewSliderDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        detailsButton.pageDelegation = self
    }

    func buttonMaskColor(){
        println("delegate work")
    }
}

---

class DetailPageViewController: UIPageViewController, UIPageViewControllerDelegate, UIPageViewControllerDataSource {

    weak var pageDelegation:PageViewSliderDelegate?

func pageViewController(pageViewController: UIPageViewController, viewControllerAfterViewController viewController: UIViewController) -> UIViewController? {

    pageDelegation?.buttonMaskColor()

    var page = (viewController as! PageDelegate).pageNumber + 1
    return viewControllerForPage(page)
}

Answer 1

在為嵌入的序列提供標識符和標識符之后，應在mainView的prepareForSegue函數中將self分配給pageDelegation，如下所示：

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if segue.identifier == "embedSegueIdentifier" {

        let distinationVC = segue.destinationViewController as? DetailPageViewController

        distinationVC?.pageDelegation = self

    }

}