ios - 使用自定义动画呈现嵌入导航 Controller 中的 View Controller

Question

我有 vc1，它正在呈现导航 Controller ，其中包含 vc2。 vc1和导航 Controller 之间的segue是“模态呈现”，vc2以标准动画从下到上出现。

我想通过自定义过渡动画从 vc1 呈现嵌入导航 Controller 的 vc2。

Storyboard sample

我已经尝试过

class CustomAnimator: NSObject {
    func animationDuration() -> TimeInterval {
        return 1.0
    }

    fileprivate func animateCustomTransition(using transitionContext: UIViewControllerContextTransitioning) {
        // ...
    }
}

extension CustomAnimator: UIViewControllerAnimatedTransitioning {
    func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval {
        return animationDuration()
    }

    func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
        animateCustomTransition(using: transitionContext)
    }
}

class CustomTransitionDelegate: NSObject {
    let animator: CustomAnimator
    override init() {
        animator = CustomAnimator()
        super.init()
    }
}

extension CustomTransitionDelegate: UIViewControllerTransitioningDelegate {
    func animationController(forPresented presented: UIViewController, presenting: UIViewController, source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return self.animator
    }
}

class Vc2ViewController: UIViewController {

    // ...

    var customTranstionDelegate = CustomTransitionDelegate()

    //...
}

然后:

(1) 设置vc2的transitioningDelegate。显然没有效果。

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let navController = segue.destination as? UINavigationController {
        if let controller = navController.viewControllers.first as? Vc2ViewController {
            controller.transitioningDelegate = controller.customTranstionDelegate
        }
    }
}

(2) 子类 UINavigationController 并设置其transitioningDelegate。 vc2 以所需的方式出现，但导航栏已消失，并且 vc2 之后的下一个 View Controller 未出现在“显示”segue 上。

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if let controller = segue.destination as? Vc2NavigationController {
        controller.transitioningDelegate = controller.customTranstionDelegate
    }
}

如何使用自定义过渡动画从 vc1 呈现嵌入导航 Controller 的 vc2？

Answer 1

您可以使用嵌入式 - https://developer.apple.com/documentation/uikit/uiviewcontrolleranimatedtransitioning

To add user interaction to a view controller transition, you must use an animator object together with an interactive animator object—a custom object that adopts the UIViewControllerInteractiveTransitioning protocol.