Re: [Rubycocoa-talk] Address of structure

[Duncan M. <du...@on...>]

Thank you very much - timely and practical.

Duncan

On 27 Apr 2009, at 10:51, Allison Newman wrote:

> Hi Duncan,
>
> I don't know about anyone else, but here's what I do when I want to  
> use NSData:
>
> rect =  [0, 0, image_params.width_pt,   
> image_params.height_pt].pack('L_*')
> data = NSData.alloc.initWithBytes_length(rect, 16)
>
> Of course there are probably a few zillion other ways of achieving  
> the same aim.  Hope that helps.
>
> Alli
>
> On Monday, April 27, 2009, at 11:05AM, "Duncan McGregor" <du...@on... 
> > wrote:
>> Sorry to have to ask this, but Sourceforge's mailing list search is  
>> so
>> bad that I can't find an answer even if it exists.
>>
>> I'm trying to put a CGRect into an NSData
>>
>> rect_pt = CGRectMake(0, 0, image_params.width_pt,
>> image_params.height_pt)
>> data = NSData.alloc.initWithBytes_length(rect_pt, 16)
>>
>> ArgumentError: Expected either String/Array/ObjcPtr for argument #0
>> (but got OSX::CGRect).
>>
>> How do I create the ObjcPtr from a CGRect?
>>
>> Thanks in anticipation
>>
>> Duncan McGregor
>> www.VelOCRaptor.com - Simple Mac OCR
>>
>> PS - Is there a better way of creating an NSData from a structure?