Answer by Sergey Kalinichenko for How do I save a UIImage to a file?

You have to construct a representation of your image as a particular format (say, JPEG or PNG), and then call writeToFile:atomically: on the representation:

UIImage *image = ...;NSString  *path = ...;[UIImageJPEGRepresentation(image, 1.0) writeToFile:path atomically:YES];