Define the app delegate as a constant?

Question

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]

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

[ikub.subscriptions count]

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

Please help!!!!

Answer 1

您需要将宏值包装在括号中（否则，宏中的强制转换应用于属性，此时该属性是未知的。）所以：

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