title: IOS Photos framework
body: <p>I want to retrieve all the photos from all the <strong>local</strong> albums on the device. Basically all the photos that are on the device
  Will the list of local identifiers be unique ?
  What is the best approach for this using the photos framework.</p>
  
  <p>My question is not duplicate since the other question talks about also cloud assets and assets that are not on the device. When retrieving actual data of the image it returns null data when trying to fetch synchronize.</p>