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Questions tagged [ctframe]

9 questions
3
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2 answers

CTFrame clipping first line of text

I am running into a problem while using Core Text, where the first line of the text I display in a CTFrame is cut off at the top, as seen in the screenshot below, with the character "B": I think I'm doing something wrong while setting the leading…
Dominic Mortlock
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Setting line spacing in a CTFrame

I'm working in a kind of QR Code generator, it's a Mac app. I know how draw the text, but I don't know how I can set line spacing. My code: // Prepare font CTFontRef font = CTFontCreateWithName(CFSTR("LucidaSansUnicode"), 16, NULL); //…
PabloLerma
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How do I determine the origin of a CGPath?

I'm drawing text within a CGPath, in order to do hit-testing on the text, I'm using CTFrameGetLineOrigins. Here's what the documentation says: Each CGPoint is the origin of the corresponding line in the array of lines returned by CTFrameGetLines,…
kubi
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Get previous CTFrame object from given text position with CoreText

Here's example code block let attrString = NSAttributedString(string: "very long string goes here...") // very long string var currentTextPos = 400 // current text position. ex. 400 let framesetter =…
Igor Prusyazhnyuk
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How do you satisfy the 'lineOrigins' argument in CTFrameGetLineOrigins() in Swift?

I'm trying to figure out CTFrameGetLineOrigins from here: CTFrameGetLineOrigins Got Incorrect Origins, and trying to convert the ObjC to Swift. Obj-C: CFArrayRef lines = CTFrameGetLines(frame); size_t numOfLines = CFArrayGetCount(lines); CGPoint…
Kevin Wang
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NSObliquenessAttributeName ignored by CTFrameDraw()

Something strange is going on. I was working with NSAttributedString for some formatting, including slants and skews. NSObliquenessAttributeName did the trick. But then I wanted to expand into CoreText to take control of the frame the text is…
Ryan Poolos
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CTFrameGetLineOrigins return frong Y coordinates

All x coordinates are correct, but all y coordinates are incorrect - always 3.40282e+38. How to get correct y for each CTLine? CTFramesetterRef framesetter =…
7foots
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How to add CTFrame to UIViewController?

The goal is to format and show text as like as iBooks style pages. For this I take UIPageViewController, specify transition for needed animation and generate UIViewController collection and etc. To show text I place UITextView into each…
RomanVD
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CTFrameGetVisibleStringRange() returns 0

I have this code that generates an array of viewController while reading an NSAttributedString. After the first cycle, the function CTFrameGetVisibleStringRange() returns 0 even if there is more text to display. - (void)buildFrames { /*here we do…
Lolloz89
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