Change colour of like button in tableview cell - swift

Question

I am trying to change the color of the like button in my table view cell to red when the users taps on the like button for a specific post. But at the moment when i click like for one post, all the other post like buttons turn red too.
func didTapLike(_ sender: UIButton) {
if let indexPath = getCurrentCellIndexPath(sender) {
clickedLike = indexPath
like()
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if indexPath.section == 0 {
let cell = tableView.dequeueReusableCell(withIdentifier: "postCell", for: indexPath) as! PostTableViewCell
if let indexPath = clickedLike {
// change like button to red
let selectedRow = indexPath.row
cell.HeartButton.setImage(UIImage(systemName: "heart.fill"), for: .normal)
cell.HeartButton.tintColor = UIColor.red
cell.LikeCount.textColor = UIColor.red
}
}
}

Answer 1

You have to understand the principle of reusable cells. What is happening is the cells that you have liked are being re-used to the cells that you never liked in the first place. Thus, it looks as if you liked everything because property of the cells that you never liked never had their properties reset.
The same cell maybe be reused with the same properties later on even though you have set its properties at the cellForRowAt function which is why you may see that there's no changes. Thus, you have to specifically reset its properties every time it is reused.
This can be done by overriding the prepareForReuse()inside the cell and setting the properties to its default values again. For example, you may want to try the following in your PostTableViewCell:
override func prepareForReuse() {
super.prepareForReuse()
//set it all back to the default values (in this case, heart and black color tint)
self.HeartButton.setImage(UIImage(systemName: "heart"), for: .normal)
self.HeartButton.tintColor = UIColor.black
self.LikeCount.textColor = UIColor.black
}