Macros
Macros simplify your work when building bar buttons because the creation task is so repetitive. The following macro creates a basic button item:
#define BARBUTTON(TITLE, SELECTOR) [[UIBarButtonItem alloc] \ initWithTitle:TITLE style:UIBarButtonItemStylePlain \ target:self action:SELECTOR]
You supply it with a title and a selector to call. Each call to this macro specifies only the title and selector, tightening up the code’s readability:
self.navigationItem.rightBarButtonItem = BARBUTTON(@"Push", @selector(push:));
This version of the macro assumes that the target is "self", which is quite common, although you could easily adapt this. The following macro adds a target ...
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