ios - Perform action button in uitableview cell to perform delete functionality -

i have 1 table view, , in each cell have x button delete particular cell . have done iboutlet of button custom table view cell. , in cell row @ index path have done add target button. when press button in table view cell. app crash. if put braekpoint. showing in target added code line.

here code :

func followbutton(sender: anyobject) {           if let button = sender as? uibutton {             print("button clicked: \(button.tag)")             let item = addtocartdata[button.tag]             print("name: \(item.cartid!)")              let headers = [                 "cache-control": "no-cache",                 "postman-token": "4c933910-0da0-b199-257b-28fb0b5a89ec"             ]              let jsonobj:dictionary<string, any> = [                 "cartid" : "\(item.cartid!)",                 "carttype" : "3"             ]               if (!jsonserialization.isvalidjsonobject(jsonobj)) {                 print("is not valid json object")                 return             }              if let postdata = try? jsonserialization.data(withjsonobject: jsonobj, options: jsonserialization.writingoptions.prettyprinted) {                 let request = nsmutableurlrequest(url: nsurl(string: "http://exp.cart.php")! url,                                                   cachepolicy: .useprotocolcachepolicy,timeoutinterval: 10.0)                 request.httpmethod = "post"                 request.allhttpheaderfields = headers                 request.httpbody = postdata                  let session = urlsession.shared                 let datatask = session.datatask(with: request urlrequest, completionhandler: { (data, response, error) -> void in                     if (error != nil) {                         ///print(error)                     } else {                          dispatchqueue.main.async(execute: {                              if let json = (try? jsonserialization.jsonobject(with: data!, options: [])) as? dictionary<string,anyobject>                             {                                 let status = json["status"] as? int;                                  if(status == 1)                                 {                                      // self.tableview.reloaddata()                                     print("items deleted")                                     self.tableview.reloaddata()                                   }                              }                         })                     }                 })                  datatask.resume()             }           }      } 

in swift 3, action's argument selector, syntax #selector(method-signature). final code is:

func tableview(_ tableview: uitableview, cellforrowat indexpath: indexpath) -> uitableviewcell {     let cell = tableview.dequeuereusablecell(withidentifier: "cartcel", for: indexpath) as! carttableviewcell     cell.deletebutton.tag = indexpath.row;     cell.deletebutton.addtarget(self, action: #selector(followbutton(sender:)), for: .touchupinside)      return cell; } 

for additional question:

i need value of each cell , need pass parameter 1 api call. if not mach. how can selector. perform delete functionality

func followbutton(sender: anyobject) {     if let button = sender as? uibutton {         print("button clicked: \(button.tag)")         let item = addtocartdata[button.tag]         print("name: \(item.cartproname), quality: \(item.proqty), price: \(item.cartproprice)")     } }