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Alex Rivera
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I am writing a .jpg file to my app's Documents directory like this: NSData *img = UIImageJPEGRepresentation(myUIImage, 1.0); BOOL retValue = [img writeToFile:myFilePath atomically:YES]; Later, I load that image back into a UIImage using: UIImage *myImage = [UIImage imageWithContentsOfFile:path]; I know it works because I can draw the image in a table cell and it is fine. Now if I try to use UIImageJPEGRepresentation(myImage, 1.0), the debugger prints out these lines: <Error>: Not a JPEG file: starts with 0xff 0xd9 <Error>: Application transferred too few scanlines And the function returns nil. Does anybody have an idea why this would happen? I haven't done anything to manipulate the UIImage data after it was loaded. I just provided the UIImage to an image view in a cell. I set the image view properties such that all the images in the cells line up and are the same size, but I don't think that should have anything to do with being able to convert the UIImage to NSData.
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