swift tableview how to select all rows

Question

I have Button in tableview I want when I press that button will select all cell rows, how to do that? I tried alot but I got nothing

I\'m so confused how to make the but

Answer 1

var selectedUsernameArray : NSMutableArray = []
var username1Array : NSMutableArray = ["hel","dsf","fsdg"]//just a sample

Initially button name should be "Select all"

Button action :

 @IBAction func buttonAction(sender: UIButton) {

   if(sender.titleLabel?.text == "Select all")
    {
        selectedUsernameArray .addObjectsFromArray(username1Array as [AnyObject])
        sender.titleLabel?.text = "Deselect all"
    }
    else
   {
    selectedUsernameArray .removeAllObjects();
    sender.titleLabel?.text = "Select all"
    }

    self.tableView .reloadData()
}

tableview delegate

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! UITableViewCell
    var ob: AnyObject = username1Array .objectAtIndex(indexPath.row);
    cell.textLabel?.text = ob as? String;
    if(selectedUsernameArray .containsObject(ob))
    {
      cell.backgroundColor = UIColor.blueColor();
    }
    else
    {
        cell.backgroundColor = UIColor.whiteColor();
    }
    return cell
}

Answer 2

In cellForRowAtIndexPath:

UITableViewCell *cell...

cell.accesoryType = isSelectAll ? UITableViewCellAccessoryCheckmark : UITableViewCellAccessoryNone;

Answer 3

var isSelectAll = false; //global variable

isSelectAll = true;//on button action
self.tableView.reloadData()//on button action

in cellForRowAtIndexPath method

if(isSelectAll==true)
{
cell.backgroundColor = UIColor.blueColor();
}
else
{
cell.backgroundColor = UIColor.white();
}