Download and cache images in UITableViewCell

by

Swift 3:

Flickering can be avoided by this way:

Use the following code in public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell

cell.photoImageView.image = nil //or keep any placeholder here
cell.tag = indexPath.row
let task = URLSession.shared.dataTask(with: imageURL!) { data, response, error in
    guard let data = data, error == nil else { return }

    DispatchQueue.main.async() {
        if cell.tag == indexPath.row{
            cell.photoImageView.image = UIImage(data: data) 
        }
    }
}
task.resume()

By checking cell.tag == indexPath.row, we are assuring that the imageview whose image we are changing, is the same row for which the image is meant to be. Hope it helps!

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