I have a piece of code I'm using fairly often and would like to make a macro out of it. I'm not exactly sure how to do that though. Here's the code I want to use
UIImage *titleImage = [UIImage imageNamed:@"myLogo.png"]; UIImageView *titleImageView = [[UIImageView alloc] initWithImage:titleImage]; self.navigationItem.titleView = titleImageView; [titleImageView release]; I want to define this block as a macro so I can later say for instance addImage(...); Thanks for your help.
#define MY_MACRO( img ) \ {\ UIImage *titleImage = [UIImage imageNamed:img]; \ UIImageView *titleImageView = [[UIImageView alloc] initWithImage:titleImage]; \ self.navigationItem.titleView = titleImageView; \ [titleImageView release];\ } Use it like this:
MY_MACRO( @"myLogo.png" ) The use of {} creates a scope block, which will prevent problems with variable redefinitions (if you have variables with the same name, where you use the macro).
use #define with the preprocessor, write a function, or write a method for your class.
Try the following macro
#define addImage( __imageName__) \ UIImage *titleImage = [UIImage imageNamed:__imageName__]; \ UIImageView *titleImageView = [[UIImageView alloc] initWithImage:titleImage]; \ self.navigationItem.titleView = titleImageView; \ [titleImageView release]; \ #define Image_Macro @"myLogo.png" UIImage *titleImage = [UIImage imageNamed:Image_Macro]; UIImageView *titleImageView =[[UIImageView alloc] initWithImage:titleImage]; self.navigationItem.titleView = titleImageView;
