Image in table view [duplicate] - ios

Question

This question already has an answer here:
Asynchronously load image in uitableviewcell
(1 answer)
Closed 5 years ago.
I have a problem with the image in table view cell
The images are downloaded form the Google Firebase and in every cell there is one of that
But when I scroll up or down the images change automatically the index
Here is my code, someone can help me? thanks a lot!
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if postsArray[indexPath.row].imageNoImage == true{
let cell = tableView.dequeueReusableCell(withIdentifier: "imageLook", for: indexPath) as! imageLookTableViewCell
cell.authorLabel.text = self.postsArray[indexPath.row].author
cell.likesCountLabel.text = "\(self.postsArray[indexPath.row].likes!)"
cell.postID = postsArray[indexPath.row].postId
cell.textViewPost.text = self.postsArray[indexPath.row].textPost
let url = URL(string: postsArray[indexPath.row].pathToImage as! String)
if url != nil {
DispatchQueue.global().async {
let data = try? Data(contentsOf: url!)
DispatchQueue.main.async {
if data != nil {
cell.imagePost.image = UIImage(data:data!)
}else{
}
}
}
}
for person in self.postsArray[indexPath.row].peopleWhoLike {
if person == FIRAuth.auth()!.currentUser!.uid {
cell.likesBtn.isHidden = false
break
}
}
return cell
}

Answer 1

Your question is not very descriptive/well written, but I think your problem is that you are not caching your images.
Try this:
let imageCache = NSCache()
let cell = tableView.dequeueReusableCell(withIdentifier: "imageLook", for: indexPath) as! imageLookTableViewCell
cell.authorLabel.text = self.postsArray[indexPath.row].author
cell.likesCountLabel.text = "\(self.postsArray[indexPath.row].likes!)"
cell.postID = postsArray[indexPath.row].postId
cell.textViewPost.text = self.postsArray[indexPath.row].textPost
let url = URL(string: postsArray[indexPath.row].pathToImage as! String)
if url != nil {
if let cachedImage = imageCache.objectForKey(url) as? UIImage {
cell.imagePost.image = cachedImage
return
}
DispatchQueue.global().async {
let data = try? Data(contentsOf: url!)
DispatchQueue.main.async {
if data != nil {
if let myImageName = UIImage(data:data!){
imageCache.setObject(myImageName, forKey: url)
}
cell.imagePost.image = UIImage(data:data!)
}else{
}
}
}
}
for person in self.postsArray[indexPath.row].peopleWhoLike {
if person == FIRAuth.auth()!.currentUser!.uid {
cell.likesBtn.isHidden = false
break
}
}
return cell
}