Does Objective-C support Mixin like Ruby?

Question

In Ruby, there\'s Modules and you can extend a class by \"mixing-in\" the module.

module MyModule
  def printone
    print \"one\" 
  end
end

class MyClass
         


        

Answer 1

You can literally mixin the code using #include. This is not advisable and is against all the religions in objective-c, however works perfectly.

Please, don't do it in the production code.

for example in the file:

MixinModule.header (should not be compiled or copied to the target)

-(void)hello;

MixinModule.body (should not be compiled or copied to the target)

-(void)hello{
    NSLog(@"Hello");
}

in mixin class:

@interface MixinTest : NSObject
#include "MixinModule.header"
@end

@implementation MixinTest
#include "MixinModule.body"
@end

usage case:

#import 

int main(int argc, const char * argv[]){
    @autoreleasepool {
        [[[MixinTest new] autorelease] hello];
    }
    return 0;
}

Please, don't do it in the production code.