Swift自定义转换不工作（未调用UIViewControllerTransitioningDelegate）

我只是想切换到第二个视图控制器。我的HomeViewController具有以下扩展：

extension HomeViewController: UIViewControllerTransitioningDelegate {
    func animationController(forPresented presented: UIViewController,
                             presenting: UIViewController,
                             source: UIViewController)
        -> UIViewControllerAnimatedTransitioning? {
        return transition
    }

    public func animationController(forDismissed dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return nil
    }
}

和类中定义的转换

let transition = PopAnimator()

我有一个按钮，当它被点击时，应该切换视图控制器并使用自定义转换（PopAnimator）：

PopAnimator类（目前实际上只是一个fadeIn）：

单击该按钮时，它将切换ViewController，但不使用自定义转换。如果我在animationController（forPresented:presenting:source:）函数或PopAnimator类中放置断点，则不会到达该断点

        self.present(viewController, animated: false, completion: nil)

如果要设置动画过渡，请尝试设置

animated:true

class PopAnimator: NSObject, UIViewControllerAnimatedTransitioning {
    let duration = 1.0
    var presenting = true
    var originFrame = CGRect.zero

    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return duration
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        let containerView = transitionContext.containerView

        let toView = transitionContext.view(forKey: .to)!

        containerView.addSubview(toView)
        toView.alpha = 0.0
        UIView.animate(withDuration: duration,
        animations: {
            toView.alpha = 1.0
        },
        completion: { _ in
            transitionContext.completeTransition(true)
        }
        )
    }
}

        self.present(viewController, animated: false, completion: nil)