UITableView Checkmark ONLY ONE Row at a Time

Question

You'd think this would be easy. With this code, I can check multiple rows in a table but what I WANT is to only have one row checked at a time. If a user selects a different row, then I want the old row to simply AUTOMATICALLY uncheck. Don't know how to do that. Here's my code:

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

[tableView deselectRowAtIndexPath:indexPath animated:YES];


UITableViewCell *theCell = [tableView cellForRowAtIndexPath:indexPath];

if (theCell.accessoryType == UITableViewCellAccessoryNone) {
    theCell.accessoryType = UITableViewCellAccessoryCheckmark;
    }

    else if (theCell.accessoryType == UITableViewCellAccessoryCheckmark) {
    theCell.accessoryType = UITableViewCellAccessoryNone;
    }
}

Thanks for any help you can lend!

Answer 1

Here's what I came up when I had this problem.
This code is implemented in the latest version of Swift, as of today...
For more info and/or the extension file, please check out the Github Gist of this snippet.

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {       
    if let sip = selectedIndex {
        tableView.deselectRow(at: sip, animated: false)
    }
    selectedIndex = indexPath
}

override func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
    if selectedIndex?.row == indexPath.row {
        selectedIndex = nil
    }
}

Answer 2

The best way is to set the accessory type in cellForRowAtIndexPath and use didSelectRowAtIndexPath to only record which path should be selected and then call reloadData.

Answer 3

tested and solved try this its worked perfectly

add this as global variable

var selectedIndexPath = NSIndexPath(row: 0, section: 0)

Add this in didselect method

        // old one check off
        if indexPath != selectedIndexPath as IndexPath {
            let oldCell = categorytable.cellForRow(at: selectedIndexPath as IndexPath)
            if oldCell?.accessoryView != nil {
                oldCell?.accessoryView = nil
            }
            else {
                let imageName = "checkmark"
                let image: UIImageView = UIImageView(image: UIImage(named: imageName))
                cell.accessoryView = image
            }
        }
        // the new one on

        if  cell.accessoryView == nil {
            let imageName = "checkmark"
            let image: UIImageView = UIImageView(image: UIImage(named: imageName))
            cell.accessoryView = image
        }
        else {
            cell.accessoryView = nil
        }

Answer 4

I think https://stackoverflow.com/a/5960016/928599 will help you.
I used it and it Works with deselectRowAtIndexPath too!

Answer 5

In Swift, following works perfectly:

lastSelectedIndexPath = NSIndexPath(forRow: 1, inSection: 0)//Row will be the previous selected row


    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
    let cell:LabelsSelectionCell = tableView.dequeueReusableCellWithIdentifier("LabelsSelectionCell", forIndexPath: indexPath) as! LabelsSelectionCell
    cell.setCellLael(labelOptionsArray[indexPath.row])
    if lastSelectedIndexPath == indexPath
    {
        cell.setCellCheckedStatus(true)
    }
    return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
    if let _ = lastSelectedIndexPath
    {
        let lastCell:LabelsSelectionCell = tableView.cellForRowAtIndexPath(lastSelectedIndexPath!) as! LabelsSelectionCell
        lastCell.setCellCheckedStatus(false)
    }
    let currentCell:LabelsSelectionCell = tableView.cellForRowAtIndexPath(indexPath) as! LabelsSelectionCell
    currentCell.setCellCheckedStatus(true)

    lastSelectedIndexPath = indexPath

    tableView.deselectRowAtIndexPath(indexPath, animated: true)
}

Answer 6

You don't need to reload the tableView.

See the below code:

Declare a NSIndexPath lastSelectedIndexPath variable for your class

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

    if(lastSelectedIndexPath) {

        UITableViewCell *lastCell = [tableView cellForRowAtIndexPath:lastSelectedIndexPath];
        [lastCell setAccessoryView:nil];
    }

    UITableViewCell *currentCell = [tableView cellForRowAtIndexPath:currentIndexPath];
    [currentCell setAccessoryView:UITableViewCellAccessoryCheckmark];

    lastSelectedIndexPath = indexPath;
}