how to select Table View row selection with custom checkbox button? - ios

Question

How to select tableview row with custom button . i have another button called select all its outside of the table view my question is while clicking outside of the tableview button how to select and deselect inside tableview rows? At the same time i could able to select single row in the tableview ? how to do it in swift 3? This is my code in cellforrow method
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let identifier = "Custom"
var cell: TStudentAttendanceCell! = tableView.dequeueReusableCell(withIdentifier: identifier) as? TStudentAttendanceCell
if cell == nil {
tableView.register(UINib(nibName: "TStudentAttendanceCell", bundle: nil), forCellReuseIdentifier: identifier)
cell = tableView.dequeueReusableCell(withIdentifier: identifier) as? TStudentAttendanceCell
}
print("studentAttendanvceArray--",studentAttendanceArray.object(at: indexPath.row) )
var localDic :NSDictionary!
localDic = studentAttendanceArray.object(at: indexPath.row) as! NSDictionary
Common.sharedInstance.StopActivity()
cell.profile_img.image = self.image
cell.name_lbl.text = localDic["student_name"] as? String
cell.selectionStyle = UITableViewCellSelectionStyle.none
cell.contentView.backgroundColor = UIColor.clear
let whiteRoundedView : UIView = UIView(frame: CGRect(x: 10, y: 8, width: self.view.frame.size.width - 20, height: 90))
whiteRoundedView.layer.backgroundColor = CGColor(colorSpace: CGColorSpaceCreateDeviceRGB(), components: [1.0, 1.0, 1.0, 0.9])
whiteRoundedView.layer.masksToBounds = false
whiteRoundedView.layer.cornerRadius = 2.0
whiteRoundedView.layer.shadowOffset = CGSize(width: -1, height: 1)
whiteRoundedView.layer.shadowOpacity = 0.2
cell.contentView.addSubview(whiteRoundedView)
cell.contentView.sendSubview(toBack: whiteRoundedView)
return cell
}

Answer 1

ViewController
class ViewController: UIViewController,UITableViewDelegate, UITableViewDataSource {
#IBOutlet var tableView: UITableView!
var allStudentsArr:[[String:String]] = []
var selectedRows:[IndexPath] = []
override func viewDidLoad() {
super.viewDidLoad()
tableView.allowsSelection = false
allStudentsArr = [["name":"name1"],["name":"name2"],["name":"name3"],["name":"name4"],["name":"name5"],["name":"name6"],["name":"name7"],["name":"name8"]]
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return allStudentsArr.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as! CustomTableViewCell
cell.nameLbl.text = allStudentsArr[indexPath.row]["name"]
if selectedRows.contains(indexPath)
{
cell.checkBox.setImage(UIImage(named:"selected"), for: .normal)
}
else
{
cell.checkBox.setImage(UIImage(named:"unselected"), for: .normal)
}
cell.checkBox.tag = indexPath.row
cell.checkBox.addTarget(self, action: #selector(checkBoxSelection(_:)), for: .touchUpInside)
return cell
}
#objc func checkBoxSelection(_ sender:UIButton)
{
let selectedIndexPath = IndexPath(row: sender.tag, section: 0)
if self.selectedRows.contains(selectedIndexPath)
{
self.selectedRows.remove(at: self.selectedRows.index(of: selectedIndexPath)!)
}
else
{
self.selectedRows.append(selectedIndexPath)
}
self.tableView.reloadData()
}
#IBAction func selectAllBtnAction(_ sender: UIBarButtonItem) {
self.selectedRows = getAllIndexPaths()
self.tableView.reloadData()
}
func getAllIndexPaths() -> [IndexPath] {
var indexPaths: [IndexPath] = []
for j in 0..<tableView.numberOfRows(inSection: 0) {
indexPaths.append(IndexPath(row: j, section: 0))
}
return indexPaths
}
}
Custom Cell
class CustomTableViewCell: UITableViewCell {
#IBOutlet var nameLbl: UILabel!
#IBOutlet var checkBox: UIButton!
}

Answer 2

Thats how you can programatically select all rows of a single section
#IBAction func didTapSelectAllButton(sender: UIButton) {
let totalRows = tableView.numberOfRows(inSection: 0)// Make some logic if you have more than 1 section
for row in 0..<totalRows {
let indexPath = IndexPath(row: row, section: 0)
tableView.selectRow(at: indexPath, animated: false, scrollPosition: .none)
}
}
If you don't want to use default check box of tableView then disable multipleSelection from tableView and implement logic using an extra global array.
var selectedArrayIndex = [Int]()
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
if selectedArrayIndex.contains(indexPath.row) {
selectedArrayIndex.remove(at: selectedArrayIndex.index(of: indexPath.row)!)
}else {
selectedArrayIndex.append(indexPath.row)
}
}
override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if selectedArrayIndex.contains(indexPath.row) {
// Enable You Check
cell.checkBoxView.isHidden = false
}else {
cell.checkBoxView.isHidden = true
}
}
#IBAction func didTapSelectAllButton(sender: UIButton) {
let totalRows = tableView.numberOfRows(inSection: 0)// Make some logic if you have more than 1 section
selectedArrayIndex.removeAll()
for row in 0..<totalRows {
selectedArrayIndex.append(row)
}
}