如何获得对当前UINavigationController的引用? [英] How can I get a reference to the current UINavigationController?

问题描述

在Objective-C中，获取对当前UINavigationController的引用的最佳方法是什么?我想从可能没有引用UIController，委托或其他任何内容的任何类中获取对它的访问.

In Objective-C, what is the best way of getting a reference to the current UINavigationController? I would like to gain access to it from any class that may not have a reference to a UIController, delegate, or anything else.

是否存在获取当前UINavigationController的现有方法?我应该添加一些东西到我的应用程序委托中，然后检索它吗?

Is there an existing way to get the current UINavigationController? Should I add something to my application delegate, and retrieve that?

推荐答案

事实证明，尽管有很多点语法，您仍可以从任何UIView/UIViewController后代中获得它.

As it turns out, you can get it, albeit with quite a bit of dot syntax, from any UIView/UIViewController descendant.

self.(view).window.rootViewController.navigationController;

如果您使用的对象是任何其他类的后代，则同样如此，只是必须通过 UIApplication

If you are using an object that descends from any other class, the same is true, except you must go through UIApplication

[UIApplication sharedApplication].keyWindow.rootViewController.navigationController;

当然，这两者都在很大程度上破坏了MVC，因此绝对建议将必须接触默认导航控制器"的任何逻辑都添加到根视图控制器中.

Of course, both of these break MVC in a big way, and it is definitely recommended that any logic that must touch the "default navigation controller" be added to the root view controller.

这篇关于如何获得对当前UINavigationController的引用?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！