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Exifを付与し、/tmpに画像を保存するサンプルコード
- (void)setExifInfo:(UIImage *)image {
CGImageSourceRef cgImage = CGImageSourceCreateWithData((__bridge CFDataRef) UIImageJPEGRepresentation(image, 1), NULL);
NSMutableDictionary *exifDict = [[NSMutableDictionary alloc] init];
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"yyyy:MM:dd HH:mm:ss"];
NSString *original = [outputFormatter stringFromDate:[NSDate date]];
[exifDict setObject:original forKey:(__bridge NSString *) kCGImagePropertyExifDateTimeOriginal];
[exifDict setObject:original forKey:(__bridge NSString *) kCGImagePropertyExifDateTimeDigitized];
NSMutableData *imageData = [[NSMutableData alloc] init];
CGImageDestinationRef destination = CGImageDestinationCreateWithData((__bridge CFMutableDataRef) imageData, CGImageSourceGetType(cgImage), 1, nil);
CGImageDestinationAddImageFromSource(destination, cgImage, 0, (__bridge CFDictionaryRef) [NSDictionary dictionaryWithObjectsAndKeys:
exifDict, (__bridge NSString *) kCGImagePropertyExifDictionary, nil]);
CGImageDestinationFinalize(destination);
NSString *exportPath = [NSString stringWithFormat:@"%@%@", NSTemporaryDirectory(), @"exportWithExif.jpg"];
[imageData writeToFile:exportPath atomically:YES];
CFRelease(cgImage);
CFRelease(destination);
}
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