ios - Swift协议(protocol)委派不起作用

我有一个带viewController的containerView。从pageView滑动视图后，我想在viewController中调用一个函数，我已经尝试了下面的代码，但它正在调用pageView，请问我的问题在哪里？

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)
}

最佳答案

您应该在主视图中的prepareForSegue函数中为pageDelegation分配self，然后为嵌入的segue指定标识符，如下所示：

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

    if segue.identifier == "embedSegueIdentifier" {

        let distinationVC = segue.destinationViewController as? DetailPageViewController

        distinationVC?.pageDelegation = self

    }

}