ios - interactivePopGestureRecognizer 弹出到根而不是 1 个顶部 Controller

Question

我使用 UINavigationController 的默认实现和从左到右弹出的默认手势 (interactivePopGestureRecognizer)。我怎样才能让 interactivePopGestureRecognizer 弹出到根 Controller 而不是只有 1 个顶级 Controller ？

Answer 1

我找到了一种方法，可以在推送新 View Controller 后从堆栈中删除之前的 View Controller 。

navigationController.pushViewController(newViewController, animated: true, completion: {
    self.navigationController.removePreviousViewController()
})

这里是一个扩展

extension UINavigationController {
    func pushViewController(_ viewController: UIViewController, animated: Bool, completion: @escaping () -> Void) {
        pushViewController(viewController, animated: animated)
        guard animated, let coordinator = transitionCoordinator else {
            DispatchQueue.main.async { completion() }
            return
        }
        coordinator.animate(alongsideTransition: nil) { _ in completion() }
    }

    func removePreviousViewController() {
        if viewControllers.count > 2 {
            viewControllers.removePrevious()
        }
    }
}

一些 helper

extension Array {
    mutating func removePrevious() {
        remove(at: count - 2)
    }
}