title: Cannot convert value of type 'Int' to expected argument type 'IndexSet'
body: <pre><code>for number in 0..&lt;fetchResult.count{
      imgManager.requestImage(for: fetchResult.objects(at: number) as! PHAsset, targetSize: CGSize(width:200, height:200), contentMode: .aspectFill, options: requestOptions, resultHandler: {
      image, error in
          self.imageArray.append(image!)
      })
  }
  </code></pre>
  
  <p>I have following error with number in fetchResult.objects(at:number)</p>
  
  <blockquote>
    <p>cannot convert value of type 'Int' to expected argument type 'IndexSet'</p>
  </blockquote>
  
  <p>How can I solve this problem?</p>