Question

Okay so I am slowly figuring this out. Just one more issue I am having. I am using a string and saying that if the string is equal to the cell text to put a checkmark on it when it loads the tableView.

Here is my code for that:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

static NSString *CellIdentifier = @"Cell";
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if ([cell.textLabel.text isEqualToString:transferData]) {

    cell.accessoryType = UITableViewCellAccessoryCheckmark;

}

I am then telling it to remove that checkmark and add the checkmarks accordingly when being selected:

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

cell.accessoryType = UITableViewCellAccessoryNone;

  UITableViewCell      *cellCheck = [tableView
                              cellForRowAtIndexPath:indexPath];

cellCheck.accessoryType = UITableViewCellAccessoryCheckmark;

  transferData = cellCheck.textLabel.text;
  NSLog(@"%@", transferData);
}


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

UITableViewCell* uncheckCell = [tableView
                                cellForRowAtIndexPath:indexPath];
uncheckCell.accessoryType = UITableViewCellAccessoryNone;

}

Everything works fine, except when it first loads. For some reason when I select on another cell, the checkmark that is originally loaded with the tableView won’t go away. Why is this?

Answer 1

You are making a common mistake.

When selecting the cell, you are setting the state of the check mark directly. What you should be doing is setting the state of the checkmark in the data source and let the table cell configure itself from the data source.

Edited example for an exclusive checked table view

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSArray *changedIndexPaths = nil;

    NSIndexPath *currentCheckedIndexPath = [self indexPathOfCurrentCheckedObject];

    if (currentCheckedIndexPath && ![currentCheckedIndexPath isEqual:indexPath]) {
        // There is currently a checked index path - unselect the data source and
        // add it to the changed index array.

        [[self.tableData objectAtIndex:currentCheckedIndexPath.row] setChecked:NO];
        changedIndexPaths = @[indexPath, currentCheckedIndexPath];
    } else{
        changedIndexPaths = @[indexPath];
    }

    [[self.tableData objectAtIndex:indexPath.row] setChecked:YES];

    [self.tableView reloadRowsAtIndexPaths:changedIndexPaths withRowAnimation:UITableViewRowAnimationNone];

}

I have a new sample app you can download to see the whole project: