core-text

How can I add text alignment attribute to an NSAttributedString to center the text? Edit: Am I doing anything wrong? It doesn't seem to change the alignment. CTParagraphStyleSetting setting; setting.spec = kCTParagraphStyleSpecifierAlignment; setting.valueSize = kCTCenterTextAlignment; CTParagraphStyleSetting settings[1] = { {kCTParagraphStyleSpecifierAlignment, sizeof(CGFloat), &setting}, }; CTParagraphStyleRef paragraph = CTParagraphStyleCreate(settings, sizeof(setting)); NSMutableAttributedString *mutableAttributed = [[NSMutableAttributedString alloc] initWithAttributedString:self

I need to calculate exact bounding box for every each character (glyph) in NSAttributedString (Core Text). After putting together some code used to solve similar problems (Core Text selection, etc..), the result is quite good, but only few frames (red) are being calculated properly: Most of the frames are misplaces either horizontally or vertically (by tiny bit). What is the cause of that? How can I perfect this code?: -(void)recalculate{ // get characters from NSString NSUInteger len = [_attributedString.string length]; UniChar *characters = (UniChar *)malloc(sizeof(UniChar)*len);

I'm trying to draw text using Core Text functions, with a line spacing that's as close as possible to what it would be if I used NSTextView. Take this font as an example: NSFont *font = [NSFont fontWithName:@"Times New Roman" size:96.0]; The line height of this font, if I would use it in an NSTextView is 111.0. NSLayoutManager *lm = [[NSLayoutManager alloc] init]; NSLog(@"%f", [lm defaultLineHeightForFont:font]); // this is 111.0 Now, if I do the same thing with Core Text, the result is 110.4 (assuming you can calculate the line height by adding the ascent, descent and leading). CTFontRef

How do I change the vertical alignment of the text in a CTFramesetter frame? I want my text to be in the middle instead of being at the top . I am using Core Text framework. There is a setting of the paragraph to change horizontal aligment but not vertical. Finally figured it out ... CGRect boundingBox = CTFontGetBoundingBox(font); //Get the position on the y axis float midHeight = self.frame.size.height / 2; midHeight -= boundingBox.size.height / 2; CGPathAddRect(path, NULL, CGRectMake(0, midHeight, self.frame.size.width, boundingBox.size.height)); Ken Thanks Nick, that was a great snippet.

I have a long NSString I want to display over a couple of pages. But to do this, I need to find out how much text will actually fit on the page. [NSString sizeWithFont: ...] Is not enough, it will just tell me if the text fits in the rectangle or not, if its does not, it will silently truncate the string, but it won't tell me where it truncated! I need to know the first word that does not fit on the page, so I can split the string and draw that part of it on the next page. (and repeat) Any ideas how to solve this? Only idea I have myself so far is to repeatedly call sizeWithFont

In the code below, CTFramesetterSuggestFrameSizeWithConstraints sometimes returns a CGSize with a height that is not big enough to contain all the text that is being passed into it. I did look at this answer . But in my case the width of the text box needs to be constant. Is there any other/better way to figure out the correct height for my attributed string? Thanks! CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(attributedString); CGSize tmpSize = CTFramesetterSuggestFrameSizeWithConstraints(framesetter, CFRangeMake(0,0), NULL, CGSizeMake(self.view.bounds.size.width,