ios - UINavigationController 的 interactivePopGestureRecognizer 不工作

Question

我正在尝试实现自定义 id <UIViewControllerAnimatedTransitioning>将一个特定的 View Controller 推送到导航 Controller 的导航堆栈时的对象。

但是，我发现这样做会阻止 UINavigation Controller 使用默认的交互式转换，即使在不使用我的自定义转换的 View Controller 上也是如此。

我不知道为什么会这样。

经过进一步调查，我发现从该方法返回 nil

- (id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController
                               animationControllerForOperation:(UINavigationControllerOperation)operation
                                            fromViewController:(UIViewController *)fromVC
                                              toViewController:(UIViewController *)toVC

也以某种方式禁用了默认的交互式过渡。

如何在某些情况下继续使用 UINavigationController 的默认交互式过渡，同时在其他情况下使用自定义过渡对象？

Answer 1

这是一个 blog post详细说明可能的解决方案。我没有测试过。似乎是一个非常骇人听闻的解决方法。正如作者所说，如果 Apple 进行更改，它可能会崩溃，但是嘿。

引用:

What I ended up doing was creating a new instance of a UIScreenEdgePanGestureRecognizer, configure it with the left edge and set the exact same target/action as our interactivePopGestureRecognizer, with other words, the instance of _UINavigationInteractiveTransition and the action handleNavigationTransition:. And finally add it to the UINavigationControllers view. There is a bit of -valueForKey: and NSSelectorFromString() in the final solution that I am not very proud of, but it works perfectly. Remember to be safe when implementing a solution like this, Apple change stuffs, as we all know.