ios - Find custom Object index in array -

i have array of custom object called service , in didselectrow populate selected array of object:

func tableview(tableview: uitableview, didselectrowatindexpath indexpath: nsindexpath) {     if let cell = tableview.cellforrowatindexpath(indexpath) {         let services:[service] = self.menu[indexpath.section].services         self.selectedservices.append(services[indexpath.row])     } } 

the problem can't figure out how retrieve diddeselectrow:

func tableview(tableview: uitableview, diddeselectrowatindexpath indexpath: nsindexpath) {     if let cell = tableview.cellforrowatindexpath(indexpath) {         cell.accessorytype = .none         let services = self.menu[indexpath.section].services         let service = services[indexpath.row]         //how can found index position of service inside selectedservices?      }  } 

i suggest don't store selectedservices, rely on uitableview.indexpathsforselectedrows.

var selectedservices: [service] {     let indexpaths = self.tableview.indexpathsforselectedrows ?? []     return indexpaths.map { self.menu[$0.section].services[$0.row] } } 

this way, don't need manually maintain selectedservices , remove entire tableview(_:didselectrowatindexpath:) function.

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if must maintain separate state, find service using index(where:) or index(of:) — see how find index of list item in swift?.

if let = (self.selectedservices.index { $0 === service }) { // find index `i` in array has item identical `service`.     self.selectedservices.remove(at: i) }