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string attributes and lineheight

Hi,

I would like to use a background color to annotate some text, using the following code:


attributes = [NSDictionary dictionaryWithObject: backGroundColor forKey: NSBackgroundColorAttributeName];
[layoutManager addTemporaryAttributes: attributes forCharacterRange: aRange];


This works fine, only that the color in two adjacent lines touch. I rather would like to have some white space between the lines. So I tried this:

attributes = [NSDictionary dictionaryWithObjectsAndKeys: backGroundColor, NSBackgroundColorAttributeName,
[NSNumber numberWithFloat: 1], NSBaselineOffsetAttributeName, nil];

But that didn't give the expected result. Is there I way I can adjust the lineheight for the backgroundcolor attribute?


thanks,

- Koen.
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