title: how to change the button title on click inside a tableview cell in swift 3
body: <p>I got  a tableview cell inside that i have image view , label and a ui button , i need to change the button title text and background colour on click . But when i try to do button from multiple cell is having the same effect . Please do help me !</p>
  
  <pre><code>func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -&gt; UITableViewCell {
  
      let cell = tableView.dequeueReusableCell(withIdentifier: "cell1", for: indexPath) as! subTableViewCell
  
      cell.catNameLabel.text = categoryNameArray[indexPath.row]
  
      cell.descLabel.text = descriptionArray[indexPath.row]
  
      cell.freqLabel.text = frequency[indexPath.row] + " at " + frequencyTime[indexPath.row]
  
      let url = "http://wiinnova.com/tenly/image/category_image/\(categoryImageArray[indexPath.row])"
  
      cell.img.imageFromServerURL(urlString: url)
      cell.button.tag = indexPath.row
      return cell 
  }
  </code></pre>