Save UIImage in Documents directory

Question

I know this way to save image in document directory.

// Save image.
[UIImagePNGRepresentation(image) writeToFile:filePath atomically:YES];

But want to save UIImage in Document directory directly without converting it to NSData . Is there any way?

Answer 1

To save a UIImage as a file in an image format, use the ImageIO framework .

In this example, I save an image into the Application Support directory as a tiff (this is fastest because no compression is involved):

CGImageSourceRef src = // ... whatever, depends on how you got the image originally
NSFileManager* fm = [NSFileManager new];
NSURL* suppurl = [fm URLForDirectory:NSApplicationSupportDirectory
                            inDomain:NSUserDomainMask
                   appropriateForURL:nil
                              create:YES error:nil];
NSURL* tiff = [suppurl URLByAppendingPathComponent:@"mytiff.tiff"];
CGImageDestinationRef dest =
    CGImageDestinationCreateWithURL((__bridge CFURLRef)tiff,
                                    (CFStringRef)@"public.tiff", 1, nil);
CGImageDestinationAddImageFromSource(dest, src, 0, nil);
bool ok = CGImageDestinationFinalize(dest);
// error-checking omitted
CFRelease(src); CFRelease(dest);