title: how to get image from PHAssetCollection
body: <p>As you see I try to retrieve image from all photos and put last one in imageView. I don't know how to do the same with selfie. How to use PHImageManager to retrieve image from selfie collection.</p>
  
  <pre><code>    let photoOptions = PHFetchOptions()
      photoOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: true)]
  
      let photos = PHAsset.fetchAssets(with: .image, options: photoOptions)
  
      let selfies = PHAssetCollection.fetchAssetCollections(with: .smartAlbum, subtype: .smartAlbumSelfPortraits, options: photoOptions)
  
      var size = CGSize()
  
      size.height = 200
      size.width = 200
  
      let asset = photos.lastObject
  
      PHImageManager.default().requestImage(for: asset!, targetSize: size, contentMode: PHImageContentMode.aspectFit , options: nil) { (result, info) -&gt; Void in
  
          self.mainImage.image = result
          print("P gI: Image gotten. Image Size: \(self.mainImage.image?.size), Size: \(size), Date: \(asset?.creationDate)")}
  
      let selfieAsset = selfies.lastObject
      PHImageManager.default().requestImage(for: selfieAsset!, targetSize: size, contentMode: PHImageContentMode.aspectFit , options: nil) { (result, info) -&gt; Void in
  
          self.mainImage.image = result
          print("P gI: Image gotten. Image Size: \(self.mainImage.image?.size), Size: \(size), Date: \(asset?.creationDate)")}
  </code></pre>