Thanks Watson
It was helpful and actually it is not even needed to assign the value to the
range.
I realised that I was dereferencing the object in wrong places.
Best
K
>
> Date: Tue, 22 Jan 2013 07:30:47 +0900
> From: Watson
> To: "MacRuby development discussions."
>
> Subject: Re: [MacRuby-devel] MacRuby pointers and Obj-C function
> returning a alue by reference
> Message-ID:
> Content-Type: text/plain; charset="utf-8"
>
> Hi
>
> Maybe, you could write your code as following:
>
> $ macirb --simple-prompt
>>> framework 'AppKit'
> => true
>>> range = Pointer.new(NSRange.type)
> => #
>>> range.assign NSMakeRange(0,1)
> => #
>>> str = NSAttributedString.alloc.initWithString("hello")
> => hello{
> }
>>> str.attribute(NSUnderlineStyleAttributeName, atIndex:0,
>>> effectiveRange:range)
> => nil
>
>
>
> Cheers.
> Watson
>
>> I am trying to implement the following method of NSAttributedString in
>> Macruby:
>>
>> - (id)attribute:(NSString *)attributeName atIndex:(NSUInteger)index
>> effectiveRange:(NSRangePointer)aRange
>>
>> As by definition, it `Returns the value for an attribute with a given name
>> of the character at a given index, and by reference the range over which the
>> attribute applies.`
>>
>> OK, so I need a pointer to NSRange, which I set up as follows:
>>
>> range=Pointer.new("{_NSRange=QQ}")[0]
>>
>> It seems to be fine as `range.class` => `NSRange`.
>>
>> However, when I execute the method:
>>
>> font=txtStor.attribute(NSFontAttributeName,atIndex:index,effectiveRange:range)
>>
>> my `range` is always `#`. Also, `p range` gives
>> me `#`.
>>
>> Any ideas how to implement this correctly?
>>
>> Thanks
>> K
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>>
>>
>
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