[Rubycocoa-talk] reading property lists in rubycocoa

[Ed H. <ed...@fa...>]

I'm very new to rubycocoa, and I'm not sure how to interpret this error.

Here is a script which demonstrates the problem:
--
#!/usr/bin/ruby

require 'osx/cocoa'

data=OSX::NSString.stringWithContentsOfFile('HTTPCookies.plist')
mo=OSX::NSPropertyListMutableContainersAndLeaves
fmt=OSX::NSPropertyListXMLFormat_v1_0
errst=OSX::NSString.alloc.init

pl=OSX::NSPropertyListSerialization.propertyListFromData_mutabilityOptio 
n_format_errorDescription(data,mo,fmt,errst)

puts pl.inspect

--

It fails with this error:

bash-2.05a$ ./plist.rb
/Library/Frameworks/RubyCocoa.framework/Versions/A/Resources/ruby/osx/ 
objc/oc_wrapper.rb:17:in `ocm_send':  
NSPropertyListSerialization#propertyListFromData:mutabilityOption:format 
:errorDescription: - cannot convert the argument #2 as '^i' to NS  
argument. (OSX::OCDataConvException)
         from  
/Library/Frameworks/RubyCocoa.framework/Versions/A/Resources/ruby/osx/ 
objc/oc_wrapper.rb:17:in `method_missing'
         from ./plist.rb:10

I'm not sure what I'm doing wrong here.  I assume argument #2 refers to  
mo, the mutability option, and I've determined that its value is 1.   
(The value of fmt is 100.)

I tried wrapping those arguments up in conversions to NSNumber, like  
this:

mo=OSX::NSNumber.numberWithInt(OSX::NSPropertyListMutableContainersAndLe 
aves)
fmt=OSX::NSNumber.numberWithInt(OSX::NSPropertyListXMLFormat_v1_0)

But I get the same error.