如何在UIView中获取父导航控制器 [英] How to get parent navigation controller in UIView

问题描述

我在我的app委托中创建了一个 UITabBarController 。
其中每个标签栏项目包含一个不同的 UINavigationController ，它使用NIB加载自定义 UIViewController （使用 -pushViewController：）。
在其中一个导航控制器中，我还加载了一个带有自定义NIB的自定义 UIView 类。
此视图在 UIViewController 内多次加载。

I have created a UITabBarController in my app delegate. where each tab bar item holds a different UINavigationController that loads a custom UIViewController with a NIB (using -pushViewController:). Inside one of the navigation controller, I load a custom UIView class with a custom NIB also. This view is loaded multiple times inside the UIViewController.

自定义 UIView 有一个 UIButton ，如果触摸它，我想推一个新的 UIViewController 在堆栈上。
问题是我丢失了 UINavigationController ，其中包含 UIViewController 。
我知道我应该使用代表，但是还没弄清楚谁应该成为代表。

The custom UIView has a UIButton, that on the event of touching it, I want to push a new UIViewController on the stack. Problem is that I 'lost' the UINavigationController that holds the UIViewController. I know I should use delegates, but haven't figured out who should which class should be the delegate.

提前致谢！

推荐答案

.navigationController或.tabBarController都不适用于已经创建但未被压入堆栈的UIView或UIViewController

Neither .navigationController or .tabBarController will be available for a UIView or UIViewController that's been created but not pushed onto a stack

在View（或ViewController）类上创建一个属性，该属性是初始化后可选提供的UIViewController，或者您可以向 initWithNibName添加第三个参数：bundle：

Either create a property on your View (or ViewController) class that is a UIViewController that is provided optionally after initialization or you could add a third argument to initWithNibName:bundle:

@interface CustomViewController : UIViewController
{ 
    UIViewController *owner;
}

@property (nonatomic, assign) UIViewController* owner;

@end

然后在所有者ViewController中：

Then in the owner ViewController:

CustomViewController *cvc = [[CustomViewController alloc] initWithNibNamed:nil bundle:nil];
cvc.owner = self;

太糟糕了.parentViewController是只读的，这将是一个合理的地方。

It's too bad .parentViewController is read-only, this would be the sensible place for this.

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