[MacRuby-devel] Obj-C -> MacRuby and back?

[Laurent Sansonetti]

You mean Ruby calling Objective-C?

Once the MacRuby runtime is initialized, you can access all your Objective-C objects from Ruby. For example, if you have an Objective-C class named Foo, you can do `Foo.new', etc.

Another possibility is to pass your Objective-C objects to a Ruby method by using -[NSObject performRubySelector:]. 

ruby:
class Foo
  def test(o)
    o.something
  end
end

objc:
MyObject *o = [MyObject new]; // where o responds to -something
MacRuby *runtime = [MacRuby sharedRuntime]; 
id foo_obj = [runtime evaluateString:@"new Foo"];
[foo_obj performRubySelector:@selector(test:) withArguments: o, NULL];

Check out the whole API here: http://www.macruby.org/trac/browser/MacRuby/trunk/include/ruby/objc.h

Laurent

On Apr 28, 2010, at 2:17 PM, Alexander von Below wrote:

> Thanks a lot!
> 
> I have looked at the EmbeddedRuby app, but I did not see the way "back". Could you point me in the right direction?
> 
> Alex
> Am 28.04.2010 um 22:55 schrieb Laurent Sansonetti:
> 
>> Hi Alexander,
>> 
>> On Apr 28, 2010, at 1:49 PM, Alexander von Below wrote:
>> 
>>> Hello,
>>> 
>>> I have a conceptual question:
>>> 
>>> Is it possible for an embedded ruby script running in MacRuby to call back into my Cocoa Application easily? Or would the only way be to create distributed Objects or similar IPC mechanisms?
>> 
>> It is possible to run the MacRuby runtime inside a pure Objective-C-based Cocoa app, which allows Objective-C to talk to Ruby objects (and vice-versa) inside the same process. Check out the MacRuby.h header file (an Objective-C API to talk to the runtime) inside the framework, or the EmbeddedMacRuby sample app.
>> 
>> Laurent
>> _______________________________________________
>> MacRuby-devel mailing list
>> MacRuby-devel at lists.macosforge.org
>> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
> 
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