core-text

I have to draw underlined-multiline text with all types of text alignment. I have searched on forums and got some results like: http://davidjhinson.wordpress.com/2009/11/26/underline-text-on-the-iphone/ http://forums.macrumors.com/showthread.php?t=561572 But all draw text for single line only. while i have multi-line text. The situation even become worse when the text alignment is centered. I searched and found that in iphone-sdk-3.2 there are some core-text attributes for underlining a text but no idea how to use that. Besides if I use these my problem would not be solved fully. As I have to

I was planning on using NSAttributedString to highlight portions of strings with the matching query of a user's search. However, I can't find an iOS equivalent of NSBackgroundColorAttributeName —there's no kCTBackgroundColorAttributeName . Does such a thing exist, similar to the way NSForegroundColorAttributeName becomes kCTForegroundColorAttributeName ? No, such an attribute doesn't exist in Core Text, you'll have to draw your own rectangles underneath the text to simulate it. Basically, you'll have to figure out which rectangle(s) to fill for a given range in the string. If you do your

I am trying to add a hyperlink to certain parts of my text which is being handled and drawn using CoreText. According to Apple's docs on CoreText I should be using addAttribute:NSLinkAttributeName however on iOS (4.3) it says it doesn't know NSLinkAttributeName. In my document searches it looks like NSLinkAttributeName only still exists on the Mac. Is it available on iOS and I am just missing something? If it's not available how can I create a hyperlink on part of a text using NSMutableAttributedString and CoreText? Thanks Jeremy has published JTextView , a Core Text-based UITextView analogue

Im on an iOS app that should able to highlight text, and make it clickable too. I read about NSAttributedString in iOS but it still more complicated than Spannable in android. Is there any other Objective c way to do that, if not; what should i do using NSAttributedString to highlight a paragraph word by word, and how to make my text clickable. Update: What exactly i want that each word should be clickable and can be highlighted as a single word in one paragraph. I found a perfect solution using UITextView , it will make every word in within the UITextView clickable. Firstly, Create an

According to the docs, CTFramesetterSuggestFrameSizeWithConstraints () "determines the frame size needed for a string range". Unfortunately the size returned by this function is never accurate. Here is what I am doing: NSAttributedString *string = [[[NSAttributedString alloc] initWithString:@"lorem ipsum" attributes:nil] autorelease]; CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef) string); CGSize textSize = CTFramesetterSuggestFrameSizeWithConstraints(framesetter, CFRangeMake(0,0), NULL, CGSizeMake(rect.size.width, CGFLOAT_MAX), NULL); The

I need to render rich text using Core Text in my view (simple formatting, multiple fonts in one line of texts, etc.). I am wondering if text rendered this way can be selected by user using (standard copy / paste function)? I implemented a text selection in CoreText. It is really a hard work... But it's doable. Basically you have to save all CTLine rects and origins using CTFrameGetLineOrigins (1) , CTLineGetTypographicBounds (2) , CTLineGetStringRange (3) and CTLineGetOffsetForStringIndex (4) . The line rect can be calculated using the origin (1) , ascent (2) , descent (2) and offset (3)(4) as