我正在尝试将文本呈现为不是矩形的形状。以下代码在我添加矩形路径时有效，但在添加椭圆路径时无效。最终，我想绘制任何路径（L 形等），有没有人对此有任何运气？
-(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); // THIS LINE WILL WORK
//CGPathAddEllipseInRect(path, NULL, bounds); // THIS LINE WILL CRASH IT
// Initialize an attributed string.
CFStringRef string = CFSTR("Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.");
CFMutableAttributedStringRef attrString = CFAttributedStringCreateMutable(kCFAllocatorDefault, 0);
CFAttributedStringReplaceString (attrString, CFRangeMake(0, 0), string);
// Create the framesetter with the attributed string.
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(attrString);
CFRelease(attrString);
// Create the frame and draw it into the graphics context
CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), path, NULL);
// Flip the text
CGAffineTransform flip = CGAffineTransformMake(1.0, 0.0, 0.0, -1.0, 0, self.frame.size.height);
CGContextConcatCTM(context, flip);
CTFrameDraw(frame, context);
CFRelease(framesetter);
CFRelease(frame);
}
任何帮助或想法将不胜感激。我难住了。