SwiftyPand

Easy expandable tableview cell

#Usage *Create tableview with custom cell

*Insert 2 views into cell

*Set the Priority of the height constraint of second view to 999

*For the top view set all "Constants" to 0

*Inside your custom tableView cell class make constraint variable of the height constraint

@IBOutlet weak var expandedHeightConstraint: NSLayoutConstraint!

var showDetails = false{
    didSet{
        expandedHeightConstraint.priority = showDetails ? 250 : 999
    }
}

*Inside your tableview class add heightForRowAtIndexPath function and make variable var selectedIndex = -1

override func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
  if(selectedIndex == indexPath.row){
    return 210
  }else{
    return 135
  }
}

*Inside cellForRowAtIndexPath make it to expand

if (self.selectedIndex == indexPath.row){
                self.selectedIndex = -1
            }else{
                self.selectedIndex  = indexPath.row
            }
            
            self.productstable.beginUpdates()
            self.productstable.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.Automatic)
            self.productstable.endUpdates()
        }

Images for easier understanding about constraints