UITableViewCell checkmark change on select

swift:

var selectedCell:UITableViewCell?{
    willSet{
        selectedCell?.accessoryType = .None
        newValue?.accessoryType = .Checkmark
    }
}

then:

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    selectedCell = self.tableView.cellForRowAtIndexPath(indexPath)
    self.mapView.selectAnnotation(self.mapView.annotations[indexPath.row], animated: true)
}

Another solution:

-(NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSIndexPath *oldIndex = [self.tableView indexPathForSelectedRow];
    [self.tableView cellForRowAtIndexPath:oldIndex].accessoryType = UITableViewCellAccessoryNone;
    [self.tableView cellForRowAtIndexPath:indexPath].accessoryType = UITableViewCellAccessoryCheckmark;
    return indexPath;
}

And yeah: you don't have to check if oldIndex is nil :)

---

Swift 3 and later:

override func tableView(_ tableView: UITableView, willSelectRowAt indexPath: IndexPath) -> IndexPath? {
    if let oldIndex = tableView.indexPathForSelectedRow {
        tableView.cellForRow(at: oldIndex)?.accessoryType = .none
    }
    tableView.cellForRow(at: indexPath)?.accessoryType = .checkmark

    return indexPath
}

1. Keep a property in your view controller called selectedRow, which represents the index of a row that represents the checked item in a table section.

2. In your view controller's -tableView:cellForRowAtIndexPath: delegate method, set the accessoryType of the cell to UITableViewCellAccessoryCheckmark if the cell's indexPath.row equals the selectedRow value. Otherwise, set it to UITableViewCellAccessoryNone.

3. In your view controller's -tableView:didSelectRowAtIndexPath: delegate method, set the selectedRow value to the indexPath.row that is selected, e.g.: self.selectedRow = indexPath.row

Zyphrax suggested a great solution that worked great for me! And if you need to clear the previous selected row, just use:

[self.tableView reloadData]; 

in

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath