[MacRuby-devel] MacRuby pointers and Obj-C function returning a value by reference

stephen horne fatste at gmail.com
Mon Jan 21 14:18:10 PST 2013

I've only ever made ranges in the past using this syntax: 

  range = NSMakeRange(0,1) 

Which allows you to set the start point and length.

On 21/01/2013, at 22:08, "kwicher at wichry.net" <kwicher at wichry.net> wrote:

> 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 `#<NSRange location=0 length=0>`. Also, `p range` gives me `#<NSRange location=0 length=0>`.
> Any ideas how to implement this correctly?
> Thanks
> K
> _______________________________________________
> MacRuby-devel mailing list
> MacRuby-devel at lists.macosforge.org
> http://lists.macosforge.org/mailman/listinfo/macruby-devel

Stephen Horne

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.macosforge.org/pipermail/macruby-devel/attachments/20130121/feb88f11/attachment.html>

More information about the MacRuby-devel mailing list