Deselect the rest of cells when first cell is select - ios

Question

I have a tableview cells, and the titles I get from server. Titles are array of strings. The data is drawing like this
All data
List item
Coffees
Teas
Dessert
Main dishes
when I click on each of these I can easily select them and deselect, that part works perfect. Now i want that when i select List item, Coffees, teas, dessert, main dishes together, these 5 items will be deselected and all data(first cell) will be selected automatically.
I know i should write this in didselect method, only i dont know how to write logic correctly. Please help me to solve this. Thanks
this is my code example
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
guard let isSelected = arrayOfTitles[indexPath.row].isSelected else {arrayOfTitles[indexPath.row].isSelected = true; return}
arrayOfTitles[indexPath.row].isSelected = !isSelected
filter?.values?[indexPath.row].isSelected = !isSelected
for i in 1..<arrayOfTitles.count {
if arrayOfTitles[i].isSelected == isSelected {
arrayOfTitles[0].isSelected = isSelected
arrayOfTitles[i].isSelected = !isSelected
}
}
}

Answer 1

You can try
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
guard let isSelected = arrayOfTitles[indexPath.row].isSelected else {arrayOfTitles[indexPath.row].isSelected = true; return}
arrayOfTitles[indexPath.row].isSelected = !isSelected
filter?.values?[indexPath.row].isSelected = !isSelected
let allSelected = arrayOfTitles[1...].filter { $0.isSelected }
if allSelected.count == arrayOfTitles.count - 1 {
arrayOfTitles[0].isSelected = true
(1..<arrayOfTitles.count).forEach { arrayOfTitles[$0].isSelected = false }
}
}

Answer 2

Because a table view maintains its own array of selected rows (IndexPaths), you don't really need to maintain a separate .isSelected property on your data. If you need it (for state persistence, for example), you can always grab the selected rows when needed.
So, here's another approach...
I'm guessing that if you have some of the rows selected, and you then select the top row, you would also want to deselect the other rows:
class ViewController: UIViewController, UITableViewDataSource, UITableViewDelegate {
var arrayOfTitles: [String] = [
"All data",
"List Item",
"Coffees",
"Teas",
"Dessert",
"Main dishes",
]
let tableView = UITableView()
override func viewDidLoad() {
super.viewDidLoad()
tableView.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(tableView)
let g = view.safeAreaLayoutGuide
NSLayoutConstraint.activate([
tableView.topAnchor.constraint(equalTo: g.topAnchor, constant: 20.0),
tableView.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 20.0),
tableView.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -20.0),
tableView.bottomAnchor.constraint(equalTo: g.bottomAnchor, constant: -20.0),
])
tableView.register(UITableViewCell.self, forCellReuseIdentifier: "c")
tableView.dataSource = self
tableView.delegate = self
tableView.allowsMultipleSelection = true
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return arrayOfTitles.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let c = tableView.dequeueReusableCell(withIdentifier: "c", for: indexPath)
c.textLabel?.text = arrayOfTitles[indexPath.row]
return c
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
// ignore if nothing is selected
guard let paths = tableView.indexPathsForSelectedRows else { return }
// if we selected the top row ("All data"), deselect the others
if indexPath.row == 0 {
// deselect the other rows
paths.forEach {
if $0.row != 0 {
tableView.deselectRow(at: $0, animated: true)
}
}
} else {
// get the selected rows as a sorted array of Int
let rows: [Int] = (paths.map { $0.row }).sorted()
// Int array of rows 1 thru 5
let myFiveRows: [Int] = Array(1...5)
// if the two arrays are equal (they're both [1,2,3,4,5])
if rows == myFiveRows {
// deselect all
tableView.selectRow(at: nil, animated: true, scrollPosition: .none)
// select the top row
tableView.selectRow(at: IndexPath(row: 0, section: 0), animated: true, scrollPosition: .none)
}
}
}
}