Found nil when assigning image in UICollectionView - image

Question

As a beginner in writing swift code, I am getting error in the following code:
override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = self.collectionView?.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath) as! CollectionViewCell
// Configure the cell
let imageURL = NSURL(string: usersImageArray[indexPath.row])
print("The image url is \(imageURL)")
let imageData = NSData(contentsOf: imageURL as! URL)
cell.userImage.image = UIImage(data: imageData as! Data)
cell.userName.text = usersNameArray[indexPath.row]
return cell
}
The imageURL does contain an image url and the imageData does contain image Data but still I get "fatal error: unexpectedly found nil while unwrapping an Optional value"
I have seen and read other questions and answers and tried but still I can not find the problem. What exactly is causing the error though it does contain the URL and image data?
UPDATED:
My CollectionViewCell Class:
import UIKit
class CollectionViewCell: UICollectionViewCell {
#IBOutlet weak var userImage: UIImageView!
#IBOutlet weak var userName: UILabel!
override func layoutSubviews() {
super.layoutSubviews()
self.makeImageRound()
}
func makeImageRound(){
self.userImage.layer.masksToBounds = true
self.userImage.layer.cornerRadius = self.userImage.frame.size.width/2.0
}
}

Answer 1

You have given the URL like this : optional(imageurl), it takes as it is , so you should avoid optional(. ) , to avoid this use '!' After userimagearray[indexpath.row]!
Try this and print imageurl and then see what happens
Try this
if imagedata == nil{
//give some image
}
else{
//give imagedata here
}
And take reuseidentifier = "cell"
Not cell whatever you take in a storyboard tableviewcell