Take the 2-minute tour ×  I'm quite new to working with UIImages
on the byte level, but I was hoping that someone could point me
to some guides on this matter?  I am ultimately looking to edit
the RGBA values of the bytes, based on certain parameters
(position, color, etc.) and I know I've come across
samples/tutorials for this before, but I just can't seem to find
anything now.  Basically, I'm hoping to be able to break a
UIImage down to its bytes and iterate over them and edit the
bytes' RGBA values individually. Maybe some sample code here
would be a big help as well.  I've already been working in the
different image contexts and editing the images with the CG
power tools, but I would like to be able to work at the byte
level.   Sorry, but I do understand that you cannot edit the
bytes in a UIImage directly. I should have asked my question
more clearly. I meant to ask how can I get the bytes of a
UIImage, edit those bytes and then create a new UIImage from
those bytes.  As pointed out by @BradLarson, OpenG