How can i invert UIImageView?

Question

Hy everybody! I load black and white image to UIImageView and i don't know how can i invert the colors with a button.

I load the image with this code:

ImageView.image = [UIImage imageNamed:@"image.png"];

Anyone know that?

Thanks for the help!

Answer 1

Try playing with differnt blend modes in the UIImage method:

- (void)drawAtPoint:(CGPoint)point blendMode:(CGBlendMode)blendMode alpha:(CGFloat)alpha

I haven't actually used it but maybe one of the modes will give you the result you need.