Selector In Swift 3.0

Question

I have doubt in Swift 3.0

In Objective-C you can declare a property for selector like this

@property (nonatomic,assign)SEL ItemSelected;

But how to declare a selector in Swift 3.0 as property because I would like to use this property in other class and should give action in that class.

I am trying to use it like this (Declared in tableview cell):

var itemSelected = #selector(selctedItem(_ :))

Using it in viewcontroller table view cell

cell.itemSelected(target: self, action: HomeViewController.self.selctedItem(_ :))

it's giving error

use of Undeclared item selectedItem

I am not sure how to use in tableview with selctor.

Answer 1

You can declare selector in Swift 3 like this.

var itemSelected: Selector?

Or

var itemSelected = #selector(tapGesture) 

Later you can use above itemSelected selector with action like this.

For eg:

let tap = UITapGestureRecognizer(target: self, action: itemSelected)

And tapGesture is declared like

func tapGesture(_ sender: UITapGestureRecognizer) { }

Edit: You have added collectionView inside your TableViewCell, so to get the selected IndexPath of CollectionViewCell, declare one protocol and use it with your tableViewCell.

protocol SelectedCellDelegate {
     func getIndexPathOfSelectedCell(tableIndexPath: IndexPath, collectionViewCell indexPath: IndexPath) 
}

Now create one instance of SelectedCellDelegate and instance of IndexPath within your CustomTableViewCell.

class CustomTableCell: UITableViewCell, UICollectionViewDelegate, UICollectionViewDataSource {
    //All outlet

    var delegate: SelectedCellDelegate?
    var tableCellIndexPath = IndexPath() 

    //CollectionViewDataSource method

    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
         self.delegate?.getIndexPathOfSelectedCell(tableIndexPath: tableCellIndexPath, indexPath: indexPath)
    }

}

Now inside your ViewController where you have added TableView implement the protocol SelectedCellDelegate and set the delegate and tableCellIndexPath in cellForRowAt indexPath method.

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, SelectedCellDelegate {
     //your methods

     func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
          let cell // Initialize the cell with your custom TableCell 
          cell.delegate = self
          cell.tableCellIndexPath = indexPath
          return cell
     }

Now add the delegate method in your ViewController.

func getIndexPathOfSelectedCell(tableIndexPath: IndexPath, collectionViewCell indexPath: IndexPath)  {
     print("TableView cell indexPath - \(tableIndexPath)")
     print("CollectionView cell indexPath - \(indexPath)") 
}