UITableViewCell Accessory Type Checked on Tap & Set other unchecked

Question

I am confused a little bit about settings table view cell accessories.

I have fixed two sections in my table

• Home
• Office

What I

Answer 1

I would keep track of the data that should be checked and change the cell in tableView:didSelectRowAtIndexPath: and update which data is checked in tableView:cellForRowAtIndexPath: like this:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    // do usual stuff here including getting the cell

    // determine the data from the IndexPath.row

    if (data == self.checkedData)
    {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    } else {
        cell.accessoryType = UITableViewCellAccessoryNone;
    }

    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    // determine the selected data from the IndexPath.row

    if (data != self.checkedData) {
       self.checkedData = data;
    }

    [tableView reloadData];
}

Answer 2

Declare one int variable named prev and implement this method:-

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

 UITableViewCell *cell =[tableView cellForRowAtIndexPath:indexPath];

   if (cell.accessoryType==UITableViewCellAccessoryNone) 
   {
      cell.accessoryType=UITableViewCellAccessoryCheckmark;
      if (prev!=indexPath.row) {
         cell=[tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:prev inSection:0]];
         cell.accessoryType=UITableViewCellAccessoryNone;
         prev=indexPath.row;
     }

 }
 else{
     cell.accessoryType=UITableViewCellAccessoryNone;
 }
}

Answer 3

In Swift 2.0 using custom accessoryView uitableviewcell with swift

1º Creating Globar var IndexPath

var indexSelected = NSIndexPath()

2º In didSelectRowAtIndexPath

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        indexSelected = indexPath
        TB_Lojas.reloadData()
    }

3º in cellForRowAtIndexPath:

if SelectedIndexPath == indexPath {
                let img = UIImageView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
                img.image = UIImage(named: "check")
                cell.accessoryView = img
            }else{
                let img = UIImageView(frame: CGRect(x: 0, y: 0, width: 20, height: 20))
                img.image = UIImage(named: "uncheck")
                cell.accessoryView = img
            }
}

Answer 4

BlackBerry's answer in Swift 3. UITableView with standard cells, selecting 0 or 1 cells.

private var previousSelection = NSIndexPath()

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: true)
    let cell = tableView.cellForRow(at: indexPath)!
    if cell.accessoryType == .none {
        cell.accessoryType = .checkmark
        selection = indexPath

        if previousSelection == IndexPath() {
            previousSelection = indexPath
        } else if previousSelection != indexPath {
            let previousCell = tableView.cellForRow(at: previousSelection)
            previousCell?.accessoryType = .none
            previousSelection = indexPath
        }
    } else if cell.accessoryType == .checkmark {
        cell.accessoryType = .none
        selection = IndexPath()
    }

}

Answer 5

I known this question is quite old, but here is the Swift version based on Blackberry's response (which I've voted up by the way)

import UIKit

class PlacesViewController: UITableViewController, UITableViewDelegate, UITableViewDataSource {

    var placesArray = NSMutableArray()
    
    var previousCheckedIndex = 0
    
    override func viewDidLoad() {
        super.viewDidLoad()

        self.placesArray.addObject("Tandil")
        self.placesArray.addObject("Balcarce")
        self.placesArray.addObject("Mar del Plata")
        
        self.tableView.rowHeight = UITableViewAutomaticDimension
    }

    
    
    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.placesArray.count
    }
    
    
    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        
        var cell: UITableViewCell = self.tableView.dequeueReusableCellWithIdentifier("cell") as UITableViewCell

        cell.textLabel?.text = self.placesArray.objectAtIndex(indexPath.row) as? String
        

        return cell
    }
    
    
    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

        if (indexPath.row != previousCheckedIndex) {
            var cell: UITableViewCell = self.tableView.cellForRowAtIndexPath(indexPath)!
            if (cell.accessoryType == UITableViewCellAccessoryType.None) {
                cell.accessoryType = UITableViewCellAccessoryType.Checkmark
                if (previousCheckedIndex != indexPath.row) {
                    cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow: previousCheckedIndex, inSection: 0))!
                    cell.accessoryType = UITableViewCellAccessoryType.None
                    previousCheckedIndex = indexPath.row
                }
            } else {
                cell.accessoryType = UITableViewCellAccessoryType.None
            }
        
            tableView.reloadData()
        }
    }
}

Answer 6

Here's how I do it with static cells, and bypassing cellForRow

Create a var that stores the location of the "checked" cell.

 NSInteger _checkedCell;

Then just implement willDisplayCell and didSelectRow methods like this.

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (_checkedCell == indexPath.row) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    }
    else {
        cell.accessoryType = UITableViewCellAccessoryNone;
    }
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    _checkedCell = indexPath.row;
    [self.tableView reloadData];
}