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I am using ImageIO to modify the photo GPS metadata, and then using PHPhotoLibrary.sharedPhotoLibrary().performChanges, create PHAssetChangeRequest to commit the change. While it works perfectly on iOS simulator, running on iOS devices (iPhone 4S, iPhone 6 Plus) always giving me the following error:
Error Domain=NSCocoaErrorDomain Code=-1 "The operation couldn’t be completed. (Cocoa error -1.)

My app is written entirely in Swift.

Steps to Reproduce:
When saving a location to a photo:
1. requestContentEditingInputWithOptions
2. Create NSData of the photo
3. Create CGImageSource from contentInput in step 1
4. Create CGImageDestinationCreateWithData
5. Create the GPS Dictionary with new GPS Location info
6. Add the GPS Dictionary to ImageDestination in step 4 using CGImageDestinationAddImageFromSource
7. CGImageDestinationFinalize
8. Create contentEditingOutput from contentInput from step 1
9. Define adjustmentData
10. NSData in step 4 writeToURL(contentEditingOutput in step8)
11. PHPhotoLibrary.sharedPhotoLibrary().performChanges
12. Create PHAssetChangeRequest and assign contentEditingOutput in step 8.

These steps work on iOS simulator, when I try to test it on device, it won't be able to complete the step 12, by giving me the error:
Error Domain=NSCocoaErrorDomain Code=-1 "The operation couldn’t be completed. (Cocoa error -1.)