png로 저장

PNG 로 저장하기

UIImage* im = [UIImage imageWithCGImage:cgImage]; // make image from CGRef
NSData* imdata = UIImagePNGRepresentation ( im ); // get PNG representation
UIImage* im2 = [UIImage imageWithData:imdata]; // wrap UIImage around PNG representation
UIImageWriteToSavedPhotosAlbum(im2, nil, nil, nil); // save to photo album
NSLog(@"Saved PNG");


Jpg로 저장하기 (compression)
UIImage *image_out=[UIImage imageWithCGImage:cgImage];
UIImageWriteToSavedPhotosAlbum(image_out, nil, nil, nil);