[Rubycocoa-talk] Re: Calling RubyCocoa from Objective-C app

[Rod S. <rsc...@xm...>]

  At Mon, 13 Oct 2003 10:13:09 -0600,
  Rod Schmidt wrote:
  > Unless I'm missing something (you may need to point me to something 
more
  > specific), I think you misunderstood me. I'm not trying to call Cocoa
  > classes from Ruby but Ruby classes from an Objective-C Cocoa app.

  I'm very sorry. You was not missing anything, but I had jumped to
  a misleading conclusion about your message. Now, I have understood
  your question, maybe.

I was wondering how the below would work with your own class and with 
calling methods with arguments. For example I have a class called 
Engine written in Ruby with a constructor that takes a file name. How 
do I get the class to pass to initWithRubyObject and how do I pass 
arguments to a method. Is it as simple as [class new: filename] or 
[[class alloc] init: filename]; Basically how do ruby's allocation 
scheme translate when you're trying to use it as an objective-c class.

Rod


 > Is there another way to do this besides using Ruby's C API.? How
  > could I do it using the RubyCocoa framework?

  I guess that the following show an answer of your question:

  /* cc -I/usr/lib/ruby/1.6/powerpc-darwin6.0 -framework Cocoa 
-framework RubyCocoa test.m */
  #import <Cocoa/Cocoa.h>
  #import <RubyCocoa/RubyCocoa.h>

  int main()
  {
    id pool;
    id obj;

    RBRubyCocoaInit();  /* initialize Ruby and RubyCocoa */
    pool = [[NSAutoreleasePool alloc] init];
    obj = [RBObject RBObjectWithRubyScriptCString: "'hello world'" ]; /* 
eval string */
    NSLog(@"%@", obj);
    obj = [[RBObject alloc] initWithRubyObject: rb_cTime];
    NSLog(@"%@", obj);
    obj = [obj now];   /* obj is a RBObject with wrapping a result of 
obj.now */
    NSLog(@"%@", obj);
    [pool release];
    return 0;
  }

  --
  Hisa