title: How to delete the last photo in Swift iOS8?
body: <p>I try to get the last photo from camera roll and delete it.Now I get the last photo but have problems in deleting the last photo.
  I tried this way but I delete all photos,so I plan to build a new PHFetchResult which only include the last photo but I don't know how to do that.</p>
  
  <pre><code>PHPhotoLibrary.sharedPhotoLibrary().performChanges( {
        PHAssetChangeRequest.deleteAssets(fetchResult)},
        completionHandler: { 
        success, error in
        NSLog("Finished deleting asset. %@", (success ? "Success" : error))
        }) 
  </code></pre>
  
  <p>Thank all of you to answer my question!</p>