最佳应用代表实践 [英] Best Application Delegate Practice

问题描述

我一直在这里和那里制作一些应用程序，而且我知道自己的出路.一直让我感到困惑的是访问全局属性，以及设置它们的最佳位置.我对访问事物以及如何访问它们有一些疑问.

I have been making a few apps here and there, and I know my way around. What has always confused me is accessing global attributes, and where the best place to set them are. I have a few questions about accessing things and how to access them.

您是否必须将应用程序委托头文件包含在您要访问的其他文件中?假设我有一个要使用的视图控制器，是否需要在视图控制器的.h中包含.h?或者我可以设置:

Do you have to include your application delegates header file into any other other file you want to access it in? Say I have a view controller, that I would like to use, do I need to include the .h inside my view controller's .h? Or can I set the:

@class AppDelegate;

您只能通过键入以下内容来访问委托人吗:

Can you only access the delegate by typing out:

[UIApplication sharedApplication].delegate

每次?那是我只需要习惯的东西吗?还是可以在每个.h的实现中设置以下内容:

EACH and every time? Is that something I just have to get used to? Or could I set the following in my implementation in each .h:

AppDelegate *delegate;

在 init 函数中，将单例实例放到该变量中吗?

And inside the init function, put the singleton instance to that variable?

对不起，如果这是不合时宜的，但我认为这是一个逻辑问题，人们遇到并解决问题.

Sorry if this was off structure, but I think it's a logical question people have a problem encountering and solving.

推荐答案

也许您需要重新考虑如何使用App Delegate?在我看来，也许您的课堂设计不是很好.

Maybe you need to reconsider how you are using the App Delegate? It sounds to me like perhaps you are not making a very good class design.

无论如何，这是一种简化操作的方法.不要将它放在init中，仅在需要时使用它.

Regardless, here's a way to make it easy. Don't put this in init just use it when you need it.

MyAppDelegate *delegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate];

自然地，将MyAppDelegate替换为您的应用程序委托的实际类名.

Naturally, replace MyAppDelegate with the actual class name of your app delegate.

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