UITableView didSelectRowAtIndexPath add additional checkmark at tap

Question

When i select a player in \'didSelectRowAtIndexPath\' and add a checkmark on the selected row it adds an additional checkmark.

If i tap row = 0 it adds a checkmark to ro

Answer 1

I am using storyboards with Dynamic Prototype Cells to display a list of states I used some of the ideas above before I found this solution

Step 1

@interface StateViewController : UITableViewController
{
    NSMutableArray *checkedIndexPaths;
}

Step 2

(void)viewDidLoad
{
    [super viewDidLoad];
    self.states = [[GAIGStateStore sharedInstance]allStates];

    //Setup default array to keep track of the checkmarks
    checkedIndexPaths = [NSMutableArray arrayWithCapacity:self.states.count];
    for (int i = 0; i < self.states.count; i++) {
        [checkedIndexPaths addObject:[NSNumber numberWithBool:NO]];
    }
}

Step 3

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

    //This toggles the checkmark
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

    if (cell.accessoryType == UITableViewCellAccessoryNone)
    {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        //This sets the array
        [checkedIndexPaths replaceObjectAtIndex:indexPath.row withObject:[NSNumber numberWithBool:YES]];

    } else
    {
        cell.accessoryType = UITableViewCellAccessoryNone;
         //This sets the array
        [checkedIndexPaths replaceObjectAtIndex:indexPath.row withObject:[NSNumber numberWithBool:NO]];

    }


}

Step 4

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:stateCell forIndexPath:indexPath];

    UILabel *stateLabel = (UILabel *)[cell viewWithTag:1000];

    StateProvince *myState = [self.states objectAtIndex:indexPath.row];

    stateLabel.text = myState.label;

    //Now set the check marks
    // Assume cell not checked;
    [cell setAccessoryType:UITableViewCellAccessoryNone];

    NSNumber *num = [checkedIndexPaths objectAtIndex:indexPath.row];


    if (num == [NSNumber numberWithBool:YES]) {
           [cell setAccessoryType:UITableViewCellAccessoryCheckmark];
    }


    return cell;
}