ios: change the colors of a UIImage

Question

I am working on an Iphone application.

I have png pictures that represents symbols. symbols are all black with a transparent background.

Is there a way I can

Answer 1

For playing with images using objective-c, mainly you have to use Quartz 2D/CoreGraphics framework. I suppose it will be the easiest way for you to accomplish your task.

The link to Quartz 2D guideline is here , the guideline is pretty comprehensive. Just have a look somewhere in filling the bitmap with color.

Also I've some records about the heavy image processing in my blog, you can have a look, it might be helpfull. http://levonp.blogspot.de/2012/05/quartz-getting-diff-images-of-two.html

Of course you can do it also using more advanced stuffs like OpenGL, OpenCV, etc.