January 2009 - MacRuby-devel - lists.macosforge.org

NSManagedObject being returned in delegate as Pointer
by Nic Williams 05 Jan '09

05 Jan '09

In this code sample: http://gist.github.com/41855 I am getting a Pointer instance instead of an NSManagedObject_Recipe instance (from Core Data). Subsequently the setValue:forKey: call at the end of the delegate/callback method fails. The top method addImage(sender) launches an NSOpenPanel, which delegates to the second/last method addImageSheetDidEnd:returnCode:contextInfo: when the panel is closed. But instead of passing through the NSManagedObject_Recipe instance to the contextInfo: recipe value, I am getting a Pointer. Is this correct? Or how do I get my NSManagedObject_Recipe instance from the Pointer. MacRuby src for Pointer class doesn't suggest it has any methods for getting the pointed-to thing. rb_cPointer = rb_define_class("Pointer", rb_cObject); rb_undef_alloc_func(rb_cPointer); rb_define_singleton_method(rb_cPointer, "new_with_type", rb_pointer_new_with_type, 1); rb_define_method(rb_cPointer, "assign", rb_pointer_assign, 1); rb_define_method(rb_cPointer, "[]", rb_pointer_aref, 1); Cheers Nic -- Dr Nic Williams iPhone and Rails consultants - http://mocra.com Fun with iPhone/Ruby/Rails/Javascript - http://drnicwilliams.com * Surf Report for iPhone - http://mocra.com/projects/surfreport/ *

4 5

attr_accessor on NSManagedObject
by Dr Nic Williams 05 Jan '09

05 Jan '09

I subclassed a Core Data entity Recipe with PPRecipe < NSManaged object, and created accessors for the fields: class PPRecipe < NSManagedObject attr_accessor :name, :desc, :type, :imagePath, :serves end but these fields now don't save or display correct after I create objects, and restart the app for example. If I remove the :name accessor, then the name field starts appearing/working in the app again. What do I need to do to get accessors working for NSManagedObject attributes? Cheers Nic -- Dr Nic Williams iPhone and Rails consultants - http://mocra.com Fun with iPhone/Ruby/Rails/Javascript - http://drnicwilliams.com * Surf Report for iPhone - http://mocra.com/projects/surfreport/ *

2 1

how to use self-created frameworks?
by peter royal 05 Jan '09

05 Jan '09

howdy! i'm doing some network i/o with macruby, and wanted to use the CF API's so they play nicely with a run loop on a worker thread. to that end, i found http://code.google.com/p/cocoaasyncsocket/ which is a nice delegate-based cocoa wrapper on said API's however, i'm having trouble making use of them in macruby. my initial naive attempt was to just throw the .h and .m files into my project. with this, i got an 'AsyncSocket' class in ruby, but the selectors defined in the header weren't available (and as such, it was unusable) i then tried creating a private framework, following the instructions at: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFrameworks/Tas… /apple_ref/doc/uid/20002258-106880-BAJJBIEF this works, and i can now say: framework 'AsyncSocket' and it works fine. however, i run into the same problem, none of the selectors defined in the header are available. i looked through the macruby source, and saw that when the 'framework' directive is encountered, in addition to adding the class, it looks for the BridgeSupport file. i had thought it was optional, but perhaps not? so i tried generating a .bridgesupport file using: gen_bridge_metadata -f AsyncSocket.framework -c -fobjc-gc-only (was dumping to stdout just for testing) but then that process never finished. a control-c reveals: C/usr/bin/gen_bridge_metadata:338:in ``': Interrupt from /usr/bin/gen_bridge_metadata:338:in `do_cpp' from /usr/bin/gen_bridge_metadata:45:in `path' from /usr/bin/gen_bridge_metadata:1692:in `scan_headers' from /usr/bin/gen_bridge_metadata:1690:in `map' from /usr/bin/gen_bridge_metadata:1690:in `scan_headers' from /usr/bin/gen_bridge_metadata:520:in `collect' from /usr/bin/gen_bridge_metadata:1957 from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ ruby/1.8/optparse.rb:785:in `initialize' from /usr/bin/gen_bridge_metadata:1891:in `new' from /usr/bin/gen_bridge_metadata:1891 and looking at that line in the source, its waiting on a cpp compilation, but that's failing with: cc1: error: AsyncSocket.framework/Headers/AsyncSocket.h: not a directory ... which is valid, since its a header file, not a directory. the command its trying to run is: /usr/bin/cpp-4.0 -D__APPLE_CPP__ -include /usr/include/ AvailabilityMacros.h -F"" "AsyncSocket.framework/Headers/ AsyncSocket.h" 2>/tmp/.cpp.err ... before i keep barking up the BridgeSupport tree.. is that the right path? or is there a simpler way to use an Objective-C class that's not from an Apple-supplied framework easily? thanks!! -pete -- (peter.royal|osi)(a)pobox.com - http://fotap.org/~osi

1 1

Equivalent of _cmd in macruby?
by Dr Nic Williams 01 Jan '09

01 Jan '09

Is there a nice equivalent to _cmd in macruby? Nic -- Dr Nic Williams iPhone and Rails consultants - http://mocra.com Fun with iPhone/Ruby/Rails/Javascript - http://drnicwilliams.com * Surf Report for iPhone - http://mocra.com/projects/surfreport/ *

1 0