Set color CFAttributedStringRef - ios

Question

I have this methods for draw a table ant populated . What i want is to change the color for one word from each column , but i dont know how can i do it . Can somebeday help me ,please ? Any help will be appreciate .
in my app the user can select some attributes from segmente control... I want to export what he chosen in a pdf , like a table .So on each line a word will be selected
-(void)drawTableDataAt:(CGPoint)origin
withRowHeight:(int)rowHeight
andColumnWidth:(int)columnWidth
andRowCount:(int)numberOfRows
andColumnCount:(int)numberOfColumns
{
int padding = 1;
NSArray* headers = [NSArray arrayWithObjects:#"Grand", #"Taile ok", #"Petit", nil];
NSArray* invoiceInfo1 = [NSArray arrayWithObjects:#"Extra", #"Bon", #"Ordi", nil];
NSArray* invoiceInfo2 = [NSArray arrayWithObjects:#"Gras", #"Etat", #"Maigre", nil];
NSArray* invoiceInfo3 = [NSArray arrayWithObjects:#"Cru", #"Propre", #"Sale", nil];
NSArray* invoiceInfo4 = [NSArray arrayWithObjects:#"PLourd", #"PMoyen", #"PLeger", nil];
NSArray* invoiceInfo5 = [NSArray arrayWithObjects:#"CSup", #"CEgal", #"CInf", nil];
NSArray* allInfo = [NSArray arrayWithObjects:headers, invoiceInfo1, invoiceInfo2, invoiceInfo3, invoiceInfo4, invoiceInfo5,nil];
for(int i = 0; i < [allInfo count]; i++)
{
NSArray* infoToDraw = [allInfo objectAtIndex:i];
for (int j = 0; j < numberOfColumns; j++)
{
int newOriginX = origin.x + (j*columnWidth);
int newOriginY = origin.y + ((i+1)*rowHeight);
CGRect frame = CGRectMake(newOriginX + padding, newOriginY + padding, columnWidth, rowHeight);
[self drawText:[infoToDraw objectAtIndex:j] inFrame:frame];
}
}
}
-(void)drawText:(NSString*)textToDraw inFrame:(CGRect)frameRect
{
CFStringRef stringRef = (__bridge CFStringRef)textToDraw;
// Prepare the text using a Core Text Framesetter
CFAttributedStringRef currentText = CFAttributedStringCreate(NULL, stringRef, NULL);
CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(currentText);
CGMutablePathRef framePath = CGPathCreateMutable();
CGPathAddRect(framePath, NULL, frameRect);
// Get the frame that will do the rendering.
CFRange currentRange = CFRangeMake(0, 0);
CTFrameRef frameRef = CTFramesetterCreateFrame(framesetter, currentRange, framePath, NULL);
CGPathRelease(framePath);
// Get the graphics context.
CGContextRef currentContext = UIGraphicsGetCurrentContext();
// Put the text matrix into a known state. This ensures
// that no old scaling factors are left in place.
CGContextSetTextMatrix(currentContext, CGAffineTransformIdentity);
// Core Text draws from the bottom-left corner up, so flip
// the current transform prior to drawing.
CGContextTranslateCTM(currentContext, 0, frameRect.origin.y*2);
CGContextScaleCTM(currentContext, 1.0, -1.0);
// Draw the frame.
CTFrameDraw(frameRef, currentContext);
CGContextScaleCTM(currentContext, 1.0, -1.0);
CGContextTranslateCTM(currentContext, 0, (-1)*frameRect.origin.y*2);
CFRelease(frameRef);
CFRelease(stringRef);
CFRelease(framesetter);
}

Answer 1

Based on the comments on the question, you mentioned that the words will never change. You could potentially create a whole bunch of if/else statements checking every word selected against every word in an array. I have put this down as a more efficient alternative and it should hopefully work. It may need some tweaking or even a loop to go through your chosen words, but this should hopefully put you in the right direction:
//declare your textToDraw as a new NSString
NSString *str = textToDraw;
//Make an Array of the str by adding objects that are separated by whitespace
NSArray *words = [str componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
//create a BOOL to check if your selected word exists in the array
BOOL wordExists = [words containsObject: #"%#", yourSelectedWord];
CTFramesetterRef framesetter = null;
//if the word exists, make it red
if(wordExists){
NSUInteger indexOfTheString = [words indexOfObject: #"%#", yourSelectedWord];
CFAttributedStringRef currentText = CFAttributedStringCreate(NULL,str, NULL);
[currentText addAttribute:NSForegroundColorAttributeName
value:[UIColor redColor]
range:NSMakeRange(indexOfTheString, yourSelectedWord.length)];
framesetter = CTFramesetterCreateWithAttributedString(currentText);
}
This will match your selected word found against the right word in your array and highlight it red.