Writing a masked image to disk as a PNG file

Question

Basically I\'m downloading images off of a webserver and then caching them to the disk, but before I do so I want to mask them. I\'m using the masking code everyone seems to poi

Answer 1

How about drawing into a new image, and then save that?

UIGraphicsBeginImageContext(img.size);
[img drawAtPoint:CGPointZero];
UIImage *newImg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[UIImagePNGRepresentation(newImg) writeToFile:cachePath atomically:NO];

(untested)