How to create a UIImage with UIBezierPath

Question

I wrote some code to create a UIImage with UIBezierPath but it didn\'t work.

Can someone help me find out what\'s wrong with my code?

Answer 1

Your usage would be:

UIBezierPath *path = [UIBezierPath trianglePathWithSize: CGSizeMake(50, 50)];
              path.lineWidth = 2;

UIImage *image = [path imageWithStrokeColor: [UIColor blueColor] 
                                  fillColor: [UIColor redColor]];

Category to create bezier path shapes:

@implementation UIBezierPath (Shapes)

+ (UIBezierPath *) trianglePathWithSize: (CGSize) size;
{
    UIBezierPath *result = [UIBezierPath bezierPath];
    result.lineJoinStyle = kCGLineJoinMiter;

    [result moveToPoint: CGPointMake(0, 0)];
    [result addLineToPoint: CGPointMake(size.width, size.height / 2)];
    [result addLineToPoint: CGPointMake(0, size.height)];
    [result closePath];

    return result;
}

@end

Category to take any path and render in UIImage from it:

@implementation UIBezierPath (UIImage)

- (UIImage *) imageWithStrokeColor: (UIColor *) strokeColor fillColor: (UIColor *) 

fillColor;
{
    CGRect bounds = self.bounds;

    UIGraphicsBeginImageContextWithOptions(CGSizeMake(bounds.size.width + self.lineWidth * 2, bounds.size.width + self.lineWidth * 2),
                                           false, [UIScreen mainScreen].scale);

    CGContextRef context = UIGraphicsGetCurrentContext();

    // offset the draw to allow the line thickness to not get clipped
    CGContextTranslateCTM(context, self.lineWidth, self.lineWidth);

    if (!strokeColor)
    {
        strokeColor = fillColor;
    }
    else
    if (!fillColor)
    {
        fillColor = strokeColor;
    }

    [strokeColor setStroke];
    [fillColor setFill];

    [self fill];
    [self stroke];

    UIImage *result = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return result;
}

@end