将应用代理定义为常量？ [英] Define the app delegate as a constant?

问题描述

我正在尝试编写一个iPhone应用程序，而且我有一个问题。

我已经声明一个常量作为应用程序委托在一个类

I'm trying to write an iPhone application, and I have a problem.
I have declared a constant as the app delegate inside a class

#define ikub (iKubMobileAppDelegate *)[[UIApplication sharedApplication] delegate]

当我需要获取一个数组的大小时，它是应用程序的一个实例变量

And when I need to get the size of an array, which is an instance variable for the application

[ikub.subscriptions count]

我收到错误访问未知的订阅getter方法。

我不太确定为什么会发生这种情况。

I get an error Accessing unknown 'subscriptions' getter method.
I'm not really sure why this is happening.

请帮助!!!!

推荐答案

您的宏值在括号中（否则，宏中的转换适用于该属性，此时该属性未知。）所以：

You need to wrap your macro value in parentheses (otherwise, the cast within the macro applies to the property, which at that point is unknown.) So:

#define ikub ((iKubMobileAppDelegate *)[[UIApplication sharedApplication] delegate])

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