Delegete function is not firing-Swift 4 : Scenario:
I have a table view and a custom button cell.In controller of cell I have made a delegete to call a function of MainController.
Issue is my cell button action is firing but the delete function not.

CustomCell Controller:
import UIKit

    protocol CustChatButtonDelegate: class {
        func chatActionClick(cell: CustButtonCell)
    }
    class CustButtonCell: UITableViewCell {
    
        var delegete:CustChatButtonDelegate?
         @IBOutlet weak var btnChat: UIButton!
        
        override func prepareForReuse() {
            super.prepareForReuse()
    //        self.delegete=nil
        }
        override func awakeFromNib() {
            super.awakeFromNib()
            // Initialization code
        }
        override func setSelected(_ selected: Bool, animated: Bool) {
            super.setSelected(selected, animated: animated)
    
            // Configure the view for the selected state
        }
        @IBAction func btnChatActionClick(_ sender: Any) {
            print("btn click")
            self.delegete?.chatActionClick(cell: self)
        }
        
    }

MainController:

    import UIKit
    
    class ChatController: UIViewController ,UITableViewDelegate, UITableViewDataSource, ChatButtonDelegate,CustChatButtonDelegate {
    
    func chatActionClick(cell: CustButtonCell) {
            print("btnClicked")
        }
    
    }