iphone - UITableView Multiple Selection

Question

How can I add a UITableView into my View-Based Application where the user will tap on more than one cell, and it will become selected, exactly like the Clock app's "New Alarm" setting named "Repeat" (Clock>Alarms> + >Repeat), and how can I get all of the selected cells in an array?

Answer 1

For multiple selection, add the line below in viewDidLoad()

tableView.allowsMultipleSelection = true

Configure each cell after dequeuing (or initializing) it in tableView(_:cellForRowAt:)

let selectedIndexPaths = tableView.indexPathsForSelectedRows
let rowIsSelected = selectedIndexPaths != nil && selectedIndexPaths!.contains(indexPath)
cell.accessoryType = rowIsSelected ? .checkmark : .none
// cell.accessoryView.hidden = !rowIsSelected // if using a custom image

Update each cell when it's selected/deselected

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)!
    cell.accessoryType = .checkmark
    // cell.accessoryView.hidden = false // if using a custom image
}

override func tableView(_ tableView: UITableView, didDeselectRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)!
    cell.accessoryType = .none
    // cell.accessoryView.hidden = true  // if using a custom image
}

When you're done, get an array of all the selected rows

let selectedRows = tableView.indexPathsForSelectedRows

and get the selected data, where dataArray maps to the rows of a table view with only 1 section

let selectedData = selectedRows?.map { dataArray[$0.row].ID }