Swift-静默式关闭上级控制器

当跳转其他控制器时，有时需要删除指定上级控制器，通过对UIViewController控制器进行以下扩展，从而快速的删除控制器!

extension UIViewController {
    /// - Parameter targetType: 指定控制器类型
    open func removeSuperVC(_ targetType: UIViewController.Type) {
        guard let vcs = navigationController?.viewControllers else {return}
        guard let index = vcs.lastIndex(where: { $0 .isKind(of: targetType) }) else {return}
        navigationController?.viewControllers.remove(at: index)
    }
}