Closure block not reloading table on second time swift3 - ios

Question

I have a table with button and label .When I tap on button it gets highlighted .So I have 5 rows each with button and label and when I tap on every button they are highlighted.Now on remaining view apart from table I have cancel button when I tap on it I want all the selected rows to reload again.My code works fine for the first execution .Like I selected all 5 button then tap on cancel button all rows are reloaded.But when I select button in table row again and tap on cancel nothing happens.Call is going inside my closure function I can see the correct index printed for reloading but nothing happens.My code is this-:
Cell Custom class-:
import UIKit
class TestingControllerCellTableViewCell: UITableViewCell {
#IBOutlet weak var TableButton: UIButton!
#IBOutlet weak var TableMenu: UILabel!
var TableButtonCallBack : (()->())?
override func awakeFromNib() {
super.awakeFromNib()
ButtonLayout()
// Initialization code
}
func ButtonLayout()
{
TableButton.layer.cornerRadius = 12.5
TableButton.layer.borderWidth = 1.0
TableButton.layer.borderColor = UIColor.gray.cgColor
self.selectionStyle = UITableViewCellSelectionStyle.none
}
#IBAction func filterTableRadioButtonAction(_ sender: UIButton) {
TableButtonCallBack?()
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
controller class-:
import UIKit
class filterControllerViewController: UIViewController {
#IBOutlet weak var TableViewController: UITableView!
fileprivate var ButtonSelectedIndex = [[Int]]()
fileprivate var cancelDataItemSelectedCallBack : ((Int)->())? = nil
override func viewDidLoad() {
super.viewDidLoad()
filterTableViewSetUp()
// Do any additional setup after loading the view.
}
// CANCEL ACTION
#IBAction func cancelDataItemSelected(_ sender: UIButton) {
for sectionIndex in 0..<filterRadioButtonSelectedIndex.count
{
for valueIndex in 0..<ButtonSelectedIndex[sectionIndex].count
{
cancelDataItemSelectedCallBack!(ButtonSelectedIndex[sectionIndex][valueIndex])
}
}
ButtonSelectedIndex.removeAll()
}
func TableViewSetUp()
{
TableViewController.delegate = self
TableViewController.dataSource = self
TableViewController.backgroundColor = UIColor.green
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
}
extension filterControllerViewController:UITableViewDataSource,UITableViewDelegate
{
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return data.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let filterCell = tableView.dequeueReusableCell(withIdentifier: "filterCell", for: indexPath) as! FilterControllerCellTableViewCell
filterCell.filterTableRadioButtonCallBack = {
filterCell.TableButton.backgroundColor = UIColor.blue
self.ButtonSelectedIndex.append([indexPath.row])
}
// THIS cancelDataItemSelectedCallBack CALLED FIRST TIME AND RELOAD TABLE EVEN GETS CALLED SECOND TIME SHOWS CORRECT INDEX BUT TABLE BUTTONS STLL REMAIN HIGHLIGHTED
self.cancelDataItemSelectedCallBack = { data in
let indexPath = IndexPath(item: data, section: indexPath.section)
print(indexPath)
self.TableViewController.reloadRows(at: [indexPath], with: UITableViewRowAnimation.none)
}
return filterCell
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
{
return 40.0
}
}
I know I am missing something but not getting it.Please help
print indexPath within self.cancelDataItemSelectedCallBack gives me this output which is correct.But it works only one time.
[0, 2]
[0, 3]

Answer 1

You have to reload the UI on the main thread like this:
self.cancelDataItemSelectedCallBack = { data in
OperationQueue.main.addOperation {
let indexPath = IndexPath(item: data, section: indexPath.section)
self.TableViewController.reloadRows(at: [indexPath], with: UITableViewRowAnimation.none)
}
}