title: How to handle the Don't Allow option in permission dialogue in Swift
body: <p>I was working on a app which access the user photo library using the PHAssets class method. How would be able to “Access your photos” permission dialog again once the user selects his options Allow or Don't Allow. If the user selects Allow how could we fetch the data at the same time. 
  Second how can we handle Don't Allow option in Swift.
  Here is the code:</p>
  
  <p>override func viewDidLoad() {
          super.viewDidLoad()</p>
  
  <pre><code>    // Do any additional setup after loading the view, typically from a nib.
  
          let images = PHAsset.fetchAssetsWithMediaType(PHAssetMediaType.Image, options: nil)
          let targetSize: CGSize = CGSize(width: 350, height: 480)//  target size
          let contentMode: PHImageContentMode = PHImageContentMode.AspectFill //  content mode
          images.enumerateObjectsUsingBlock {
          object, index, stop in
  
          let options = PHImageRequestOptions()
          options.synchronous = true
          options.deliveryMode = .HighQualityFormat
  
  
              PHImageManager.defaultManager().requestImageForAsset(object as! PHAsset, targetSize: targetSize, contentMode: contentMode, options: options) {
                  image, info in
                  self.myCol.append(image)
  
              }
          }
         ImageCol.store = myCol
  
  
  
  }
  </code></pre>