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POiOS Email sending photos strips GPS Data but not the iOS Email App
 

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  1. POiOS Email sending photos strips GPS Data but not the iOS Email App
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    <p>Using the </p> <pre><code>MFMailComposeViewController </code></pre> <p>and attaching an image with GPS coords (taken on the iOS device with camera) like:</p> <pre><code>UIImage* image = [info objectForKey:UIImagePickerControllerOriginalImage]; NSData* data = UIImageJPEGRepresentation(image, 1.0); [self.mailer addAttachmentData:data mimeType:@"image/jpeg" fileName:@"testimagesent.jpg"]; </code></pre> <p>is not "including" the GPS data with the email send.</p> <p>But, if the same file is sent using the iOS email application the GPS information is being sent. </p> <p>Any clue on why this is happening and / or a way to fix this, setting on the MFMail, ??? </p> <p>[Addition]</p> <p>After playing around with this a bit, if the image is part of the main bundle of the app, the metadata is included with the image on the email attachment. </p> <pre><code>NSString *photoFilePath = [[NSBundle mainBundle] pathForResource:@"testimage" ofType:@"jpg"]; NSData *data = [NSData dataWithContentsOfFile:photoFilePath]; [self.mailer addAttachmentData:data mimeType:@"image/jpeg" fileName:@"testimagesent.jpg"]; </code></pre> <p>If the image is not part of the main bundle (from photopicker, etc) the data is not part of the attachment. </p> <p>Will be playing arounds a bit, but this is looking like some sort of Apple privacy issue on sending a photo via an application email?</p> <p>[Addition2]</p> <p>It looks like it is boiling down to the statement</p> <pre><code>CGImageDestinationAddImageFromSource(destination,source,0, (__bridge CFDictionaryRef) metadataAsMutable); </code></pre> <p>Is not adding the metadata if the image is from the library. This is strange and not accepted 100%, but the code looks good and is adding / changing for a bundled image file.</p>
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    1. COThis would be my guess, though I am not 100% sure as I haven't tried to keep the GPS data is this situation. When you encode the image as a JPEG the GPS data is not getting encoded or the original UIImage doesn't have the GPS data encoded in it. One of those two is just image data without GPS data. It probably isn't MFMailComposeViewController.
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      1. POiOS Email sending photos strips GPS Data but not the iOS Email App
      1. USStephen Johnson
    2. COStephen is correct. EXIF data is added only when you save the image to the library. It is not present with `UIImagePickerControllerOriginalImage`
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      1. POiOS Email sending photos strips GPS Data but not the iOS Email App
      1. USRok Jarc
    3. COThis might help at least to get started: http://stackoverflow.com/a/5294574/653513
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      1. POiOS Email sending photos strips GPS Data but not the iOS Email App
      1. USRok Jarc
 

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