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我在JPEG圖像的EXIF標頭的UserComment字段中有一些重要的元數據信息。我試圖用iOS - 從UIImage檢索EXIF UserComment
NSData* jpgData = UIImageJPEGRepresentation(uiImage, 1.0);
CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)jpgData, NULL);
NSDictionary *metadata = (__bridge NSDictionary *) CGImageSourceCopyPropertiesAtIndex(source, 0, NULL);
NSDictionary *img_metadata = [metadata objectForKey:(NSString*)kCGImagePropertyExifDictionary];
NSString* user_comment = [img_metadata objectForKey:(NSString*)kCGImagePropertyExifUserComment];
然而,img_metadata字典,我回去不再包含用戶評論檢索它,即使它確實還有其他領域,如色彩空間和圖像尺寸是多少?有沒有辦法從UIImage對象獲取用戶評論?
這很合理,謝謝! – psalvaggio