Hi i am using AvFoundation to take still image and adding gps info to metadata and saving to photos album using Asset library but gps ingo is not saving at all.
here is my code...
[self.stillImageTaker captureStillImageAsynchronouslyFromConnection:videoConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
if (imageDataSampleBuffer != NULL) {
CFDictionaryRef exifAttachments = CMGetAttachment(imageDataSampleBuffer,kCGImagePropertyExifDictionary, NULL);
CFDictionaryRef metadataDict = CMCopyDictionaryOfAttachments(NULL, imageDataSampleBuffer, kCMAttachmentMode_ShouldPropagate);
NSDictionary *gpsDict = [NSDictionary dictionaryWithObjectsAndKeys:@"1",kCGImagePropertyGPSVersion,
@"78.4852",kCGImagePropertyGPSLatitude,@"32.1456",kCGImagePropertyGPSLongitude, nil];
CMSetAttachment(imageDataSampleBuffer,kCGImagePropertyGPSDictionary,gpsDict,kCMAttachmentMode_ShouldPropagate);
CFDictionaryRef newMetadata = CMCopyDictionaryOfAttachments(NULL, imageDataSampleBuffer, kCMAttachmentMode_ShouldPropagate);
CFDictionaryRef gpsAttachments = CMGetAttachment(imageDataSampleBuffer,kCGImagePropertyGPSDictionary, NULL);
if (exifAttachments)
{ // Attachments may be read or additional ones written
}
NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
UIImage *image = [[UIImage alloc] initWithData:imageData];
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
/
NSDictionary *newDict = (NSDictionary *)newMetadata;
[library writeImageToSavedPhotosAlbum:[image CGImage]
metadata:newDict completionBlock:^(NSURL *assetURL, NSError *error)
{
if (error)
{
}
}];
[library release];
[image release];
CFRelease(metadataDict);
CFRelease(newMetadata);
}
else if (error)
{
}
}];