如何在UIViewControllerTransitioningDelegate中实现UIStoryboardSegue？

Question

我现在就是这样做的：

func presentOverlayController(controller: UIViewController) {

    controller.modalPresentationStyle = .Custom
    controller.transitioningDelegate = self

    presentViewController(controller, animated: true, completion: nil)
}

//MARK: - UIViewControllerTransitioningDelegate

public func presentationControllerForPresentedViewController(presented: UIViewController, presentingViewController presenting: UIViewController, sourceViewController source: UIViewController) -> UIPresentationController? {
    return OverlayPresentationController(presentedViewController: presented, presentingViewController: presenting)
}

效果很棒。首先，我使用.instantiateViewControllerWithIdentifier:从故事板中获得控制器。给出控制器的正确方法：

​

​

但是，我需要使用自定义的segue实现相同的结果。

class OverlaySegue: UIStoryboardSegue, UIViewControllerTransitioningDelegate {

    override func perform() {

        destinationViewController.modalPresentationStyle = .Custom
        destinationViewController.transitioningDelegate = self
    }

    //MARK: - UIViewControllerTransitioningDelegate

    func presentationControllerForPresentedViewController(presented: UIViewController, presentingViewController presenting: UIViewController, sourceViewController source: UIViewController) -> UIPresentationController? {
        return OverlayPresentationController(presentedViewController: presented, presentingViewController: presenting)
    }
}

但它不起作用。为什么？

Answer 1

在perform的末尾，您需要调用presentViewController(destinationViewController, animated: true, completion: nil)。