core-text

I am trying to render text to a shape that isn't a rectangle. The following code works when I add a rectangular path but not when I add an elliptical path. Ultimately, I'd like to draw to any path (L shape, etc), has anyone had any luck with this? -(void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetTextMatrix(context, CGAffineTransformIdentity); CGMutablePathRef path = CGPathCreateMutable(); float w = 200.0; float h = 300.0; CGRect bounds = CGRectMake(10.0, 10.0, w, h); // I draw using only one of the following lines CGPathAddRect(path, NULL, bounds

I'm trying to determine, which particular character in UITextView has been tapped. I tried to use characterRangeAtPoint: method. But it always returns nil, wherever in the UITextView I tap. I even wrote and run the following piece of code: for (int x = 0; x<1000; x++) { pos.x = x; for (int y = 0; y<1000; y++) { pos.y = y; UITextRange * range = [textView characterRangeAtPoint:pos]; if (range!=nil) { NSLog(@"x: %f, y: %f", pos.x, pos.y); } } } Well, it never reaches the NSLog string. What am I doing wrong? This is an iOS 7 bug. characterRangeAtPoint: always returns nil , unless some text has

H! I'm writing a textview with subviews clipping features. The idea is to make all text draw around all subviews. The problem is to get it's content height. Due to the lack of documentation, I decided that the attributes dictionary for CTFramesetterSuggestFrameSizeWithConstraints is the same as for the CTFramesetterCreateFrame. Here is my clipping paths code: -(CFDictionaryRef)clippingPathsDictionary{ if(self.subviews.count==0)return NULL; NSMutableArray *pathsArray = [[NSMutableArray alloc] init]; CGAffineTransform transform = CGAffineTransformIdentity; transform = CGAffineTransformScale

I am dealing with loading a TTF from Resource only. This question helped me answer part 1. But now I need a NSFont from a CGFont or CTFont. This is for a Mac only application. How to get an NSFont from a CGFont Use CTFontCreateWithGraphicsFont . How to get an NSFont from a CTFont Do nothing. You already have one. NSFont and CTFont are toll-free bridged , so a CTFont is an NSFont and vice versa. 来源： https://stackoverflow.com/questions/4942711/how-do-i-get-an-nsfont-object-from-a-cgfont-or-ctfont-object

I am using CoreText to render multiple columns of text. However, when I set the first letter of the 1st paragraph to a bold, larger font than the rest of the text, I incur 2 issues (both visible in the attached image): The spacing underneath the first line is too big (I understand that this is because the 1st character could be a g,y,p,q etc. Lines below the first line now do not line up with corresponding lines in the next column. Any advice on how to overcome these 2 issues would be greatly appreciated, thank you. marco According to the documentation

In iOS7 CGContextSelectFont is deprecated. Deprecation message says that I have to use Core Text, but I don't know which is the exact equivalent of this piece of code: CGContextSelectFont(context, "Helvetica", kBarLabelSize, kCGEncodingMacRoman); CGContextSetTextDrawingMode(context, kCGTextFill); CGContextSetRGBFillColor(context, 0, 0, 0, 1.0); CGContextSetTextMatrix (context, CGAffineTransformMake(1.0, 0.0, 0.0, -1.0, 0.0, 0.0)); CGContextShowTextAtPoint(context, barX, barY, [@"Some text" cStringUsingEncoding:NSUTF8StringEncoding], [barValue length]); I've been able to create the font with