how to fix “Reference to 'kCGLineCapRound' is ambiguous” error in Xcode

Question

This is the code and I am receiving the error that: Reference to 'kCGLineCapRound' is ambiguous

- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];

    CGPoint currentLocation = [touch locationInView:self];

    UIGraphicsBeginImageContext(self.frame.size);
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    [self.image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
    CGContextSetLineCap(ctx,kCGLineCapRound);
    CGContextSetLineWidth(ctx, 5.0);
    CGContextSetRGBStrokeColor(ctx, 0.0, 0.0, 1.0, 1.0);
    CGContextBeginPath(ctx);
    CGContextMoveToPoint(ctx, location.x, location.y);
    CGContextAddLineToPoint(ctx, currentLocation.x, currentLocation.y);
    CGContextStrokePath(ctx);
    self.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    location = currentLocation;
}

I don't know how to get rid of this error, any help is appreciated! Thanks in advance!

Answer 1

I think you need to add CoreGraphics.framework to you project.

http://docs.millennialmedia.com/iOS-SDK/iOSAddingFrameworks.html