Update label when UITableViewCell is clicked - ios

Question

I have a table view with many table view cells. When the user clicks on a cell, I want to update the cell's label text.
Here is my table view controller class:
class MyTableViewController: UITableViewController {
var data = [Data]()
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
// Here I fetch and populate the data list
}
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return data.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cellIdentifier = "MyTableViewCell"
guard let cell = tableView.dequeueReusableCell(withIdentifier: cellIdentifier, for: indexPath) as? MyTableViewCell else {
fatalError("The dequeued cell is not an instance of MyTableViewCell.")
}
let cellData = data[indexPath.row]
cell.initialize(data: cellData)
return cell
}
}
And here is my table view cell class:
class MyTableViewCell: UITableViewCell {
var data: Data?
#IBOutlet weak var nameLabel: UILabel!
func initialize(data: Data) {
self.data = data
if let cellName = data.name {
nameLabel.text = cellName
}
}
}
How can I change the text of the nameLabel above (to "Clicked") when the user clicks on the table view cell?

Answer 1

There're no doubt different ways you could handle this, but here is what I would suggest:
Implement the UITableViewDelegate methods tableView(_:didSelectRowAt:) and tableView(_:didDeselectRowAt:). Add a selected bool to the data model for the cells in your table view, and update the state of that bool as the cells are selected/deselected.
Then modify your cellForRow(at:) method so it uses the selected flag to decide what to show in your label.
Finally, have your tableView(_:didSelectRowAt:) and tableView(_:didDeselectRowAt:) methods tell the table view to reload the newly selected/deselected cell.