この質問への答えには、多くのことが含まれます。マイナーな例として、「CGImageSourceRef ソース」がありませんでした。最も重要なことは、「あなたは誰を知っているか」というNDAの制限のために、問題をプロジェクトのコンテキストに入れることができなかったことです（私が言うことができないので、あなたが知っているほうがいいです）。質問を解析する代わりに、コードで回答を投稿しました。このコードを「you know who」のあるサンプル プログラムに挿入すると (サンプル名は言えませんが、maCVA が開発者ライブラリを検索する手がかりになるかもしれません)。ほとんどのコードが特定の大きなソース ファイルの末尾に配置され、他の行には参照行番号が付けられるようにしました (先頭から挿入を開始します)。他の唯一の変更点は、ヘッダー ファイルが CLLocationManagerDelegate を @interface に追加することです。
ログ ファイルのメタデータを表示するデバッグ コードを含めました。残っている唯一の問題は、CFDictionarySetValue または "setObject: forKey:" を使用してディクショナリ値を割り当てるかどうかです。前者を EXIF/TIFF データに、後者を GPS データに使用しましたが、EXIF/TIFF メソッドに "setObject: forKey:" コードをコメントとして含めました。どちらも機能します。「setObject: forKey:」はより簡潔です。ご意見はありますか？
@import CoreLocation; // MAS: for GPS (line 11)
@property (strong, nonatomic) CLLocationManager *locationManager; // MAS: for image metadata (line 42)
@property (nonatomic) CLLocation *location; // MAS: get it early and save it here (line 43)
@property (assign, nonatomic) id< CLLocationManagerDelegate > delegate; // MAS: do we really need this? (line 44)
/* MAS: Instantiate location manager (in viewDidLoad, about line 70)
*/
self.locationManager = [[CLLocationManager alloc] init];
/* MAS: end
*/
[self startStandardUpdates]; // MAS: get our location (in viewDidLoad about line 201, not quite at the end)
/* MAS: (still in veiwDidLoad about line 206 after dispatch)
*/
if ([CLLocationManager locationServicesEnabled]) {
NSLog(@"location services enabled");
}
else {
NSLog( @"Could not add location services to the session" );
// self.setupResult = PikBitSetupResultSessionConfigurationFailed;
// Display alert to the user.
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Location services"
message:@"Location services are not enabled on this device. Please enable location services in settings."
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* defaultAction = [UIAlertAction actionWithTitle:@"Dismiss" style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action) {}]; // NULL action to dismiss the alert.
[alert addAction:defaultAction];
[self presentViewController:alert animated:YES completion:nil];
}
if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined)
{
[self.locationManager requestWhenInUseAuthorization];
NSLog(@"location authorization status not determined");
} else if ([CLLocationManager authorizationStatus] == kCLAuthorizationStatusDenied) {
NSLog(@"location services authorization was previously denied by the user.");
// Display alert to the user.
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Location services"
message:@"Location services were previously denied by the user. Please enable location services for this app in settings."
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* defaultAction = [UIAlertAction actionWithTitle:@"Dismiss" style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action) {}]; // Do nothing action to dismiss the alert.
[alert addAction:defaultAction];
[self presentViewController:alert animated:YES completion:nil];
}
/* MAS: end
*/
/* MAS: about line 616, once you have image NSData
*/
CFDictionaryRef tempDict = CMCopyDictionaryOfAttachments(NULL, imageDataSampleBuffer, kCMAttachmentMode_ShouldPropagate);
CFMutableDictionaryRef theDict = CFDictionaryCreateMutableCopy(NULL, 0, tempDict);
[self setMyImageInfo:theDict];
[self setMyLocation:theDict];
CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)imageData, NULL);
CFStringRef UTI = CGImageSourceGetType(source);
NSMutableData *newImageData = [NSMutableData data];
CGImageDestinationRef destination = CGImageDestinationCreateWithData((__bridge CFMutableDataRef)newImageData,UTI,1,NULL);
if(!destination) {
NSLog(@"***Could not create image destination ***");
}
CGImageDestinationAddImageFromSource(destination,source,0, (CFDictionaryRef) theDict);
BOOL success = CGImageDestinationFinalize(destination);
CFRelease(destination);
CFRelease(source);
if( success ) {
NSLog(@"it worked, let's see the metadata");
[self checkEXIF:newImageData];
}
else {
NSLog(@"***Could not create data from image destination ***");
}
/* MAS: end
*/
[[PHAssetCreationRequest creationRequestForAsset] addResourceWithType:PHAssetResourceTypePhoto data:newImageData options:nil]; // MAS: change data to 'NewImageData' (about line 654)
[newImageData writeToURL:temporaryFileURL options:NSDataWritingAtomic error:&error]; // MAS: change source to newImageData (about line 668)
/* MAS: start (immediately before @end)
*/
#pragma mark - location delegate methods
// Start the standard location service
- (void)startStandardUpdates
{
// set the delegate and the parameters
self.locationManager.delegate = self;
self.locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
// Set a movement threshold for new events.
self.locationManager.distanceFilter = 500; // meters
[self.locationManager startUpdatingLocation];
NSLog(@"location manager started");
}
// Delegate methods
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
// If it's a relatively recent event, turn off updates to save power.
self.location = [locations lastObject];
NSLog(@"location manager delegate used");
NSDate* eventDate = self.location.timestamp;
NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];
if (fabs(howRecent) < 15.0) {
// If the event is recent, do something with it.
NSLog(@"latitude %+.6f, longitude %+.6f\n",
self.location.coordinate.latitude,
self.location.coordinate.longitude);
}
else {
NSLog(@"latitude %+.6f, longitude %+.6f\n",
self.location.coordinate.latitude,
self.location.coordinate.longitude);
}
/* MAS: for optimizing usage (later)
[manager stopUpdatingLocation]; // If we only want one update.
manager.delegate = nil; // We might be called again here, even though we
// called "stopUpdatingLocation", so remove us as the delegate to be sure.
*/
}
- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
// report any errors returned back from Location Services
NSLog(@"location manager error - %@", error.description);
}
- (void) setMyImageInfo:(CFMutableDictionaryRef)theDict
{
NSString *temp = @"This is a very long string, used to test the loading of the image description field";
NSString *tempID = @"ABCDEFGHIJKLMNOPQRSTUVWXYZ012345"; // used to test imageUniqueID field, should the 33rd character be a nul?
//
if (theDict) {
// save a dictionary of the TIFF image properties
CFDictionaryRef tiffData = CFDictionaryGetValue(theDict, kCGImagePropertyTIFFDictionary);
CFMutableDictionaryRef tiffDataMut;
if (tiffData) {
tiffDataMut = CFDictionaryCreateMutableCopy(nil, 0, tiffData);
}
else {
tiffDataMut = CFDictionaryCreateMutable(nil, 0,
&kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
}
// The best place to store a long string --
CFStringRef imageDescription = CFStringCreateWithCString(NULL, [temp cStringUsingEncoding:NSASCIIStringEncoding], kCFStringEncodingASCII);
CFDictionarySetValue(tiffDataMut, kCGImagePropertyTIFFImageDescription, imageDescription);
CFRelease (imageDescription);
// Carry the brand into the image --
CFStringRef software = CFStringCreateWithCString(NULL, [@"MyApp" cStringUsingEncoding:NSASCIIStringEncoding], kCFStringEncodingASCII);
CFDictionarySetValue(tiffDataMut, kCGImagePropertyTIFFSoftware, software);
CFRelease (software);
// Carry the manufacturer into the image --
CFStringRef make = CFStringCreateWithCString(NULL, [@"Apple" cStringUsingEncoding:NSASCIIStringEncoding], kCFStringEncodingASCII);
CFDictionarySetValue(tiffDataMut, kCGImagePropertyTIFFMake, make);
CFRelease (make);
// Carry the device name into the image --
CFStringRef model = CFStringCreateWithCString(NULL, [@"iPhone" cStringUsingEncoding:NSASCIIStringEncoding], kCFStringEncodingASCII);
CFDictionarySetValue(tiffDataMut, kCGImagePropertyTIFFModel, model);
CFRelease (model);
CFDictionarySetValue(theDict, kCGImagePropertyTIFFDictionary, tiffDataMut);
CFRelease(tiffDataMut);
// Now do the same for EXIF
// save a dictionary of the EXIF image properties
CFDictionaryRef exifData = CFDictionaryGetValue(theDict, kCGImagePropertyExifDictionary);
CFMutableDictionaryRef exifDataMut;
if (exifData) {
exifDataMut = CFDictionaryCreateMutableCopy(nil, 0, exifData);
}
else {
exifDataMut = CFDictionaryCreateMutable(nil, 0,
&kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
}
// This is a good place to store an ID, but it only holds 33 characters --
CFStringRef imageUniqueID = CFStringCreateWithCString(NULL, [tempID cStringUsingEncoding:NSASCIIStringEncoding], kCFStringEncodingASCII);
CFDictionarySetValue(exifDataMut, kCGImagePropertyExifImageUniqueID, imageUniqueID);
CFRelease (imageUniqueID);
// Just to see that it works --
CFStringRef userComment = CFStringCreateWithCString(NULL, [@"I hope this works! And it does!!" cStringUsingEncoding:NSASCIIStringEncoding], kCFStringEncodingASCII);
CFDictionarySetValue(exifDataMut, kCGImagePropertyExifUserComment, userComment);
CFRelease (userComment);
CFDictionarySetValue(theDict, kCGImagePropertyExifDictionary, exifDataMut);
CFRelease(exifDataMut);
}
else {
NSLog(@"Metadata Dictionairy for image empty");
}
/* alternative version (this has been tested and works) --
// Create dictionaries -
NSMutableDictionary *exif = [NSMutableDictionary dictionary];
NSMutableDictionary *tiff = [NSMutableDictionary dictionary];
// load some TIFF and EXIF data --
[tiff setObject:temp forKey:(NSString *)kCGImagePropertyTIFFImageDescription];
[tiff setObject:@"Apple" forKey:(NSString *)kCGImagePropertyTIFFMake];
[tiff setObject:@"iPhone" forKey:(NSString *)kCGImagePropertyTIFFModel];
[tiff setObject:@"PikLips" forKey:(NSString *)kCGImagePropertyTIFFSoftware];
[exif setObject:@"I hope this works! And it does, too!!" forKey:(NSString *)kCGImagePropertyExifUserComment];
[exif setObject:tempID forKey:(NSString *)kCGImagePropertyExifImageUniqueID];
// load the info into the passed CFMutableDictionaryRef --
CFDictionarySetValue(theDict, kCGImagePropertyExifDictionary, (__bridge void *)exif);
CFDictionarySetValue(theDict, kCGImagePropertyTIFFDictionary, (__bridge void *)tiff);
* end
*/
}
- (void) setMyLocation:(CFMutableDictionaryRef)theDict
{
NSMutableDictionary *gps = [NSMutableDictionary dictionary];
[gps setObject:@"2.2.0.0" forKey:(NSString *)kCGImagePropertyGPSVersion];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"HH:mm:ss.SSSSSS"];
[formatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"UTC"]];
[gps setObject:[formatter stringFromDate:self.location.timestamp] forKey:(NSString *)kCGImagePropertyGPSTimeStamp];
[formatter setDateFormat:@"yyyy:MM:dd"];
[gps setObject:[formatter stringFromDate:self.location.timestamp] forKey:(NSString *)kCGImagePropertyGPSDateStamp];
CGFloat latitude = self.location.coordinate.latitude;
if (latitude < 0) {
latitude = -latitude;
[gps setObject:@"S" forKey:(NSString *)kCGImagePropertyGPSLatitudeRef];
} else {
[gps setObject:@"N" forKey:(NSString *)kCGImagePropertyGPSLatitudeRef];
}
[gps setObject:[NSNumber numberWithFloat:latitude] forKey:(NSString *)kCGImagePropertyGPSLatitude];
CGFloat longitude = self.location.coordinate.longitude;
if (longitude < 0) {
longitude = -longitude;
[gps setObject:@"W" forKey:(NSString *)kCGImagePropertyGPSLongitudeRef];
} else {
[gps setObject:@"E" forKey:(NSString *)kCGImagePropertyGPSLongitudeRef];
}
[gps setObject:[NSNumber numberWithFloat:longitude] forKey:(NSString *)kCGImagePropertyGPSLongitude];
CGFloat altitude = self.location.altitude;
if (!isnan(altitude)){
if (altitude < 0) {
altitude = -altitude;
[gps setObject:@"1" forKey:(NSString *)kCGImagePropertyGPSAltitudeRef];
} else {
[gps setObject:@"0" forKey:(NSString *)kCGImagePropertyGPSAltitudeRef];
}
[gps setObject:[NSNumber numberWithFloat:altitude] forKey:(NSString *)kCGImagePropertyGPSAltitude];
}
if (self.location.speed >= 0){
[gps setObject:@"K" forKey:(NSString *)kCGImagePropertyGPSSpeedRef];
[gps setObject:[NSNumber numberWithFloat:self.location.speed*3.6] forKey:(NSString *)kCGImagePropertyGPSSpeed];
}
if (self.location.course >= 0){
[gps setObject:@"T" forKey:(NSString *)kCGImagePropertyGPSTrackRef];
[gps setObject:[NSNumber numberWithFloat:self.location.course] forKey:(NSString *)kCGImagePropertyGPSTrack];
}
CFDictionarySetValue(theDict, kCGImagePropertyGPSDictionary, (__bridge void *)gps);
}
#pragma mark debug
// This is used to verify the metadata loading
- (void)checkEXIF:(NSData *) imageData {
CGImageSourceRef myImageSource = CGImageSourceCreateWithData((__bridge CFDataRef)imageData, NULL);
CFDictionaryRef imagePropertiesDictionary;
CFDictionaryRef tiffPropertiesDictionary;
CFDictionaryRef exifPropertiesDictionary;
NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithBool:NO], (NSString *)kCGImageSourceShouldCache,
nil];
imagePropertiesDictionary = CGImageSourceCopyPropertiesAtIndex(myImageSource,0, (CFDictionaryRef)options);
/* these value are produced by the system
*/
CFNumberRef imageWidth = (CFNumberRef)CFDictionaryGetValue(imagePropertiesDictionary, kCGImagePropertyPixelWidth);
CFNumberRef imageHeight = (CFNumberRef)CFDictionaryGetValue(imagePropertiesDictionary, kCGImagePropertyPixelHeight);
int w = 0;
int h = 0;
CFNumberGetValue(imageWidth, kCFNumberIntType, &w);
CFNumberGetValue(imageHeight, kCFNumberIntType, &h);
// NSDictionary *propertiesDict = (NSDictionary *)CFBridgingRelease(imagePropertiesDictionary); // this assignment throws an exception later in the code
NSLog(@"Image Width: %d",w);
NSLog(@"Image Height: %d",h);
// NSLog(@"Image Properties: %@", propertiesDict);
/* These values are what we added --
*/
tiffPropertiesDictionary = CFDictionaryGetValue(imagePropertiesDictionary,kCGImagePropertyTIFFDictionary);
if ( tiffPropertiesDictionary ) {
NSString *make = (NSString *)CFDictionaryGetValue(tiffPropertiesDictionary, kCGImagePropertyTIFFMake);
NSString *model = (NSString *)CFDictionaryGetValue(tiffPropertiesDictionary, kCGImagePropertyTIFFModel);
NSString *imageDescription = (NSString *)CFDictionaryGetValue(tiffPropertiesDictionary, kCGImagePropertyTIFFImageDescription);
NSString *software = (NSString *)CFDictionaryGetValue(tiffPropertiesDictionary, kCGImagePropertyTIFFSoftware);
NSLog(@"Image Description: %@", imageDescription);
NSLog(@"Make: %@", make);
NSLog(@"Model: %@", model);
NSLog(@"Software: %@", software);
}
else {
NSLog(@"No TIFF dictionary");
}
exifPropertiesDictionary = CFDictionaryGetValue(imagePropertiesDictionary,kCGImagePropertyExifDictionary);
if ( exifPropertiesDictionary ) {
NSString *uniqueID = (__bridge NSString *)CFDictionaryGetValue(exifPropertiesDictionary, kCGImagePropertyExifImageUniqueID);
NSString *userComment = (__bridge NSString *)CFDictionaryGetValue(exifPropertiesDictionary, kCGImagePropertyExifUserComment);
NSLog(@"Unique ID: %@", uniqueID);
NSLog(@"User comment: %@", userComment);
}
else {
NSLog(@"No EXIF dictionary");
}
CFRelease(imagePropertiesDictionary);
}
/* MAS: end
*/