ios - Swift multipeer connectivity chat -

i tried create chat app similar tutorial.

the problem have right tutorial coded in swift 1, writing code in swift 2.

consequently, there errors appearing on screen not mentioned in tutorials documentation. there 2 delegate errors say,

"mpcmanager not conform x-delegate , y-delegate".

what can fix issue?

code of class mpcmanager:

// //  mpcmanager.swift //  mpcrevisited // //  created maximilian biegel on 22/04/16. //  copyright © 2016 appcoda. rights reserved. //  import uikit import multipeerconnectivity  protocol mpcmanagerdelegate {     func foundpeer()     func lostpeer()      func invitationwasreceived(frompeer: string)     func connectedwithpeer(peerid: mcpeerid) }  class mpcmanager: nsobject, mcsessiondelegate, mcnearbyservicebrowserdelegate, mcnearbyserviceadvertiserdelegate {      var session: mcsession!      var peer: mcpeerid!     var browser: mcnearbyservicebrowser!     var advertiser: mcnearbyserviceadvertiser!     var foundpeers = [mcpeerid]()     var invitationhandler: ((bool, mcsession!)->void)!     var delegate: mpcmanagerdelegate?      override init() {         super.init()          peer = mcpeerid(displayname: uidevice.currentdevice().name)          browser = mcnearbyservicebrowser(peer: peer, servicetype: "chat-mpc")         browser.delegate = self          advertiser = mcnearbyserviceadvertiser(peer: peer, discoveryinfo: nil, servicetype: "chat-mpc")         advertiser.delegate = self     }      func browser(browser: mcnearbyservicebrowser!, foundpeer peerid: mcpeerid!, withdiscoveryinfo info: [nsobject : anyobject]!) {         foundpeers.append(peerid)          delegate?.foundpeer()     }      func browser(browser: mcnearbyservicebrowser, lostpeer peerid: mcpeerid) {         (index, apeer) in foundpeers.enumerate() {             if apeer == peerid {                 foundpeers.removeatindex(index)                 break             }         }          delegate?.lostpeer()     }      func browser(browser: mcnearbyservicebrowser, didnotstartbrowsingforpeers error: nserror) {         print(error.localizeddescription)     }      func advertiser(advertiser: mcnearbyserviceadvertiser!, didreceiveinvitationfrompeer peerid: mcpeerid!, withcontext context: nsdata!, invitationhandler: ((bool, mcsession!) -> void)!) {         self.invitationhandler = invitationhandler          delegate?.invitationwasreceived(peerid.displayname)     }              func advertiser(advertiser: mcnearbyserviceadvertiser, didnotstartadvertisingpeer error: nserror) {         print(error.localizeddescription)     }      func session(session: mcsession, peer peerid: mcpeerid, didchangestate state: mcsessionstate) {         switch state {             case mcsessionstate.connected:                 print("connected session: \(session)")                 delegate?.connectedwithpeer(peerid)              case mcsessionstate.connecting:                 print("connecting session: \(session)")              default:                 print("did not connect session: \(session)")         }     }      func senddata(dictionarywithdata dictionary: dictionary<string, string>, topeer targetpeer: mcpeerid) -> bool {         let datatosend = nskeyedarchiver.archiveddatawithrootobject(dictionary)         let peersarray = nsarray(object: targetpeer)         var error: nserror?         /*          if !session.senddata(datatosend, topeers: peersarray, withmode: mcsessionsenddatamode.reliable, error: &error) {          print(error?.localizeddescription)          return false          }          */         return true     }      func session(session: mcsession, didreceivedata data: nsdata, frompeer peerid: mcpeerid) {         let dictionary: [string: anyobject] = ["data": data, "frompeer": peerid]         nsnotificationcenter.defaultcenter().postnotificationname("receivedmpcdatanotification", object: dictionary)     }      func session(session: mcsession, didstartreceivingresourcewithname resourcename: string, frompeer peerid: mcpeerid, withprogress progress: nsprogress) { }      func session(session: mcsession, didfinishreceivingresourcewithname resourcename: string, frompeer peerid: mcpeerid, aturl localurl: nsurl, witherror error: nserror?) { }      func session(session: mcsession, didreceivestream stream: nsinputstream, withname streamname: string, frompeer peerid: mcpeerid) { }   }