当我将一个视图添加到另一个视图(并且这两个视图都由视图控制器控制)时，我真的应该使用 addChildViewController 吗? [英] Shall I really use addChildViewController when I add a view to another view (and both these views are controlled by view controllers)?

问题描述

我正在构建一个带有 XIB 的 UIViewController.在这个 XIB 中，我有占位符(XIB 中的 UIView 对象)，我可以在其中放置其他视图，来自其他视图控制器.(顺便说一句，我也可以直接添加这些视图，不用占位符)

I am building a UIViewController with a XIB. In this XIB, I have placeholders (UIView objects in the XIB) in which I place other views, from other view controllers. (By the way, I could also add these views directly, without placeholders)

我不是在构建容器视图控制器:我的意思是它不是 UINavigationController.它只是一个普通"的视图控制器.例如，想象一下，我的视图中有一个小的子视图，用于显示Facebook"徽标和计数器.此facebook 视图"附加到另一个视图控制器，当触摸Facebook 视图"时调用该视图控制器.因此，Facebook 控制器"肯定需要是我的主"视图控制器的 @property.

I am not buiding a container view controller: I mean it's not a UINavigationController. It's a just a "usual" view controller. Imagine for example that I have a small subview in my view for a "Facebook" logo and a counter. This "facebook view" is attached to another view controller that is called when the "Facebook view" is touched. So, the "Facebook controller" definitely needs to be a @property of my "main" view controller.

在这种情况下，我真的应该使用 addChildViewController: 和所有机制吗?还是没有?

In this situation, should I really use addChildViewController: and all the mechanism? Or no?

谢谢！

推荐答案

你不应该仅仅使用 UIViewController 来钓鱼"到 .xib 文件中以获得视图.如果这就是你想要的，不要那样做.只需加载笔尖并拉出视图，直接:

You should not be using a UIViewController merely to "fish" into a .xib file for you to obtain the view. If that's all you want it for, don't do that. Just load the nib and pull out the view, directly:

NSArray* objects = [[UINib nibWithNibName: @"MyNib" bundle: nil]
            instantiateWithOwner:nil options:nil];
UIView* v = (UIView*)[objects firstObject];

但是如果您出于某些其他原因将 UIViewController 与此 .xib 文件结合使用，例如为了让它保持活动状态，以便 .xib 中的按钮可以向此 UIViewController 发送消息，那么绝对必须建立适当的父子关系，正如我在书中所描述的:http://www.apeth.com/iOSBook/ch19.html#_container_view_controllers

But if you are using a UIViewController in conjunction with this .xib file for some other reason, e.g. to keep it alive so that a button inside the .xib can send messages to this UIViewController, then absolutely you must make a proper parent-child relationship, as I describe in my book: http://www.apeth.com/iOSBook/ch19.html#_container_view_controllers

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