Questions tagged [ctlineref]
7 questions
26
votes
1 answer
What does it mean for a CTLine to have "string access"?
I'm trying to solve a hairy problem with UILabel, and I've gotten most of it figured out, except for one thing: I'm having a challenge understanding what it means for a CTLine to have "string access".
The method that I'd like to use is…
bryanjclark
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CTLineGetTypographicBounds in iOS -- ascent and descent are always coming back as zero
In an iOS category on NSAttributedString, I have the following:
CTLineRef line = CTLineCreateWithAttributedString((CFAttributedStringRef)self);
CGFloat ascent;
CGFloat descent;
double length = CTLineGetTypographicBounds(line, &ascent, &descent,…
William Jockusch
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2
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3 answers
Does CTLineRef own attributed string?
I'm just getting started with programming GUIs on apple (so far the framework seems fine, but I find the documentation far less informative than others...Qt, .Net, java, etc).
One of the issues I have had is understanding who owns what. For…
user1574591
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1 answer
Objective C - Core Text Find index at position?
I am trying to get the index of the closest character to a point.
The code below works perfectly fine as ling as my text alignment is set to left, as soon as I chage it to right or center it gives me the wrong index. What would be the solution to…
aryaxt
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0
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4 answers
CTLine or NSAttributedString -- get image bounds without a graphics context?
Is this possible? Basically, I have a bunch of NSAttributedString objects and corresponding CTLine objects. I want to get the image bounds before the drawRect stage. So at this point, there is nothing to draw into. I will then use these image…
William Jockusch
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0
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1 answer
Objective C - Core Text, number of characters in a line?
Given an index for current character, how can I determine the number of line that the selected character is at?
Given a CTLine how can I determine the number of characters in it?
aryaxt
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How to extract text string from a CTlineRef?
How to extract text string from a CTlineRef ?
i know for example that i can do CTLineGetStringRange(aLine) and i have the AttributedString (ie: CFAttributedStringRef) that was used to generate the line. how to extract the text string from the…
zeus
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