Setting up NSFileManager on Array

My array is setup as follows:

var images = [UIImage]()

As i add images in the app to the array i would like to us NSFileManager to save and retrieve those files when opening the app again.

func saveImageDocumentDirectory(){  let fileManager = NSFileManager.defaultManager()

  
 //Error below in Paths 

let paths = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString).stringByAppendingPathComponent()

  
//Error below in setting the image constant  

let image = UIImage(imageView.image)  
print(paths)  
let imageData = UIImageJPEGRepresentation(image!, 0.5) fileManager.createFileAtPath(paths as String, contents: imageData, attributes: nil)  }

Also the code for inserting the image into the collection view is as follows below

override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {  
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ImageView", for: indexPath)  
if let imageView = cell.viewWithTag(1000) as? UIImageView {  imageView.image = images[indexPath.item]  } 
 return cell  } 

@objc func importPicture() {  
let picker = UIImagePickerController()  
picker.allowsEditing = true  
picker.delegate = self  
present(picker, animated: true)  } 

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {  
guard let image = info[UIImagePickerControllerEditedImage] as? UIImage else { return }  dismiss(animated: true)  
images.insert(image, at: 0)  collectionView?.reloadData()  }