RubyMotion is Not Loading AudioToolbox framework

Question

So I was trying to use AudioToolbox with RubyMotion,

1, Added

app.frameworks << 'AudioToolbox'

in Rakefile,

2, And in one of my simple view controller method, simply added

p AudioFileID

3, Then rake,

4, Given an error,

uninitialized constant RecorderViewController::AudioFileID (NameError)

Obviously AudioFileID which in AudioToolbox was not loaded, I tried similar thing in CoreAudio, it works well. Do I need to require or something? Any idea? Thanks.

Did you find a solution? I'm struggling with a similar problem. — Pete, Nov 30 '12 at 16:51
@Pete Seems I did, I will test it later then update this question. — simsicon, Dec 12 '12 at 04:41
@simsicon I might have run into the same problem, would be grateful to hear your findings and solution! — Felixyz, Feb 27 '13 at 22:33
I, too, am having the same issue and would be curious to hear the solution. — Daniel Dickison, Apr 04 '13 at 18:58

score 0 · Answer 1 · answered Apr 10 '13 at 00:11

I think adding AudioToolbox to your frameworks probably is loading the toolkit, unless you're seeing errors during the build. You don't need to require anything else.

I have a RubyMotion program that calls AudioToolbox functions like AudioFileOpenURL and AudioFileGetProperty without error. Since AudioFileID is a struct, I don't think it is defined as a bare constant to use. If you are getting errors when using AudioToolbox functions, please update this question or perhaps start a new one.

score 0 · Answer 2 · edited May 30 '13 at 12:49

I created a ticket on RubyMotion bug tracker and tinkered with this issue for 3 days by myself, here is what I found

you have to patch AudioToolbox.bridgesupport for each iOS version you're targeting (/Library/RubyMotion/data/ios/6.1/BridgeSupport/AudioToolbox.bridgesupport) until this issue is fixed in upcoming RubyMotion release

Replace this line <cftype type='^{OpaqueAudioFileID=}' name='AudioFileID'/>

with <opaque type='^{OpaqueAudioFileID=}' name='AudioFileID'/>

this way RubyMotion won't treat AudioFileID as a structure defined somewhere (hence uninitialized constant error) and you'll be able to instantiate a pointer to AudioFileID by calling Pointer.new AudioFileID.type

Thanks, I didnt try but looks like make sense! – simsicon Jun 04 '13 at 08:26 — simsicon, Jun 04 '13 at 08:26

score 0 · Answer 3 · edited Jun 13 '23 at 07:09

To use the symbols from the AudioToolbox framework, you need to explicitly require them in your Ruby code. In this case, you should require the 'audio_toolbox' gem in your view controller file before using the symbols from the framework. Here's an example:

require 'audio_toolbox'

class RecorderViewController < UIViewController
  def your_method_name
    p AudioFileID
  end
end

Make sure you have the 'audio_toolbox' gem installed in your project. You can add it to your Gemfile if you haven't done so already:

gem 'audio_toolbox'

RubyMotion is Not Loading AudioToolbox framework

3 Answers3