BEMcheckbox check/uncheck issue in tableview in swift 3 - ios

Question

I am using BEMcheckbox. when i click it, it animates and show a hidden label but when I scroll my tableview my checkbox is automatically deselected. also when I scroll it doesn't select any checkbox automatically. what I want is when I scroll my tableview the checkbox which are checked remains checked and which are unchecked remains unchecked. my code is below. my view controller class.
class markAttendanceViewController: UIViewController , UITableViewDataSource , UITableViewDelegate{
#IBAction func selectall(_ sender: UIButton) {
sender.isSelected = !sender.isSelected
if sender.isSelected {
checkImageView.isHidden = false
checkboxLabel.layer.borderColor = UIColor.blue.cgColor
} else{
checkImageView.isHidden = true
checkboxLabel.layer.borderColor = UIColor.lightGray.cgColor
}
table.reloadData()
}
#IBOutlet weak var checkImageView: UIImageView!
#IBOutlet weak var checkboxLabel: UILabel!
#IBAction func backToAttendanceView(_ sender: AnyObject) {
let storyboard = UIStoryboard(name: "Main", bundle: nil)
var controller: UIViewController!
controller = storyboard.instantiateViewController(withIdentifier: "listViewController") as! listViewController
(controller as! listViewController).receivedString = "Mark Attendance"
let navController = UINavigationController(rootViewController: controller)
let revealController = self.revealViewController() as! RevealViewController
revealController.rightViewController = navController
revealController.rightViewController.view.addGestureRecognizer(revealController.panGestureRecognizer())
self.present(revealController, animated: true, completion: nil)
}
#IBOutlet weak var table: UITableView!
#IBOutlet weak var button: UIButton!
//var items:Array = [String]()
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.setNavigationBarHidden(true, animated: true)
checkboxLabel.layer.borderWidth = 1
checkboxLabel.layer.borderColor = UIColor.lightGray.cgColor
// items = ["Dashboard","Mark Attendance","Update Attendance","delete Attendance","Time Table","Academic Calendar","Reports","About Us","Logout","rbivwe","whefo","ewsow","webkgwo","wbiebfkwbei","ejwvabei","vdkgdvkJDB"]
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 20
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "attendanceTableViewCell") as! attendanceTableViewCell
// cell.studentname?.text = items[indexPath.row]
cell.serialnumber?.text = "\(indexPath.row + 1)"
if button.isSelected {
cell.present.isHidden = false
cell.box.setOn(true, animated: true)
} else
{
cell.box.setOn(false, animated: false)
cell.present.isHidden = true
}
return cell
}
}
My tableview cell class.
class attendanceTableViewCell: UITableViewCell,BEMCheckBoxDelegate {
#IBOutlet weak var present: UILabel!
#IBOutlet weak var box: BEMCheckBox!
#IBOutlet weak var studentname: UILabel!
#IBOutlet weak var serialnumber: UILabel!
#IBOutlet weak var view: UIView!
override func awakeFromNib() {
box.delegate = self
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
view.layer.masksToBounds = false
view.layer.cornerRadius = 2.0
view.layer.shadowOffset = CGSize(width: -1, height: 1)
view.layer.shadowOpacity = 0.2
// Configure the view for the selected state
}
func didTap(_ checkBox: BEMCheckBox) {
if box.on {
present.isHidden = false
} else {
present.isHidden = true
}
}
}

Answer 1

If someone still need a solution for this. The only way I got it work is to add checkBox state each time you tap on it and then check the state in cellForRowAt function. My suggestion:
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, BEMCheckBoxDelegate {
//...
var checkboxesState: [Int: Bool] = [:]
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = mainTableView.dequeueReusableCell(withIdentifier: "productCell", for: indexPath) as! ProductCell
cell.checkBox.delegate = self
cell.checkBox.tag = indexPath.row
if let isOn = checkboxesState[indexPath.row] {
if isOn {
cell.checkBox.on = true
} else {
cell.checkBox.on = false
}
} else {
cell.checkBox.on = false
}
//... other code
return cell
}
func didTap(_ checkBox: BEMCheckBox) {
checkboxesState.updateValue(checkBox.on, forKey: checkBox.tag)
}
//...
}