ios - saving objects to parse -

i'm still new ios development have knowledge of swift language, i'm trying learn how save objects parse, after created app on parse , downloaded xcode swift template parse , pasted application id & cleint-key appdelegate.swift file , add save file code parse viewcontroller file , tried run app, got error in appdelegate.swift : please check link below view error: http://i.gyazo.com/9ef2283ab1db616d4f8a13350482cbfd.png

// //  appdelegate.swift // //  copyright 2011-present parse inc. rights reserved. //  import uikit  import bolts import parse  // if want use of ui components, uncomment line // import parseui  // if want use crash reporting - uncomment line // import parsecrashreporting  @uiapplicationmain class appdelegate: uiresponder, uiapplicationdelegate {      var window: uiwindow?      //--------------------------------------     // mark: - uiapplicationdelegate     //--------------------------------------      func application(application: uiapplication, didfinishlaunchingwithoptions launchoptions: [nsobject: anyobject]?) -> bool {          parse.setapplicationid("s4evmuoptdrwk7cxkfgfgax09vbdcwowx1v51wcd",             clientkey: "y7vxfm1q4boria599stucncifghgiooekbun7n00")          parse.enablelocaldatastore()          // ****************************************************************************         // uncomment line if want enable crash reporting         // parsecrashreporting.enable()         //         // uncomment , fill in parse credentials:         // parse.setapplicationid("your_application_id", clientkey: "your_client_key")         //         // if using facebook, uncomment , add facebookappid bundle's plist         // described here: https://developers.facebook.com/docs/getting-started/facebook-sdk-for-ios/         // uncomment line inside parsestartproject-bridging-header , following line here:         // pffacebookutils.initializefacebook()         // ****************************************************************************          pfuser.enableautomaticuser()          let defaultacl = pfacl();          // if objects private default, remove line.         defaultacl.setpublicreadaccess(true)          pfacl.setdefaultacl(defaultacl, withaccessforcurrentuser:true)          if application.applicationstate != uiapplicationstate.background {             // track app open here if launch push, unless             // "content_available" used trigger background push (introduced in ios 7).             // in case, skip tracking here avoid double counting app-open.              let prebackgroundpush = !application.respondstoselector("backgroundrefreshstatus")             let oldpushhandleronly = !self.respondstoselector("application:didreceiveremotenotification:fetchcompletionhandler:")             var nopushpayload = false;             if let options = launchoptions {                 nopushpayload = options[uiapplicationlaunchoptionsremotenotificationkey] != nil;             }             if (prebackgroundpush || oldpushhandleronly || nopushpayload) {                 pfanalytics.trackappopenedwithlaunchoptions(launchoptions)             }         }         if application.respondstoselector("registerusernotificationsettings:") {             let usernotificationtypes = uiusernotificationtype.alert | uiusernotificationtype.badge | uiusernotificationtype.sound             let settings = uiusernotificationsettings(fortypes: usernotificationtypes, categories: nil)             application.registerusernotificationsettings(settings)             application.registerforremotenotifications()         } else {             let types = uiremotenotificationtype.badge | uiremotenotificationtype.alert | uiremotenotificationtype.sound             application.registerforremotenotificationtypes(types)         }          return true     }      //--------------------------------------     // mark: push notifications     //--------------------------------------      func application(application: uiapplication, didregisterforremotenotificationswithdevicetoken devicetoken: nsdata) {         let installation = pfinstallation.currentinstallation()         installation.setdevicetokenfromdata(devicetoken)         installation.saveinbackground()          pfpush.subscribetochannelinbackground("", block: { (succeeded: bool, error: nserror!) -> void in             if succeeded {                 println("parsestarterproject subscribed push notifications on broadcast channel.");             } else {                 println("parsestarterproject failed subscribe push notifications on broadcast channel error = %@.", error)             }         })     }      func application(application: uiapplication, didfailtoregisterforremotenotificationswitherror error: nserror) {         if error.code == 3010 {             println("push notifications not supported in ios simulator.")         } else {             println("application:didfailtoregisterforremotenotificationswitherror: %@", error)         }     }      func application(application: uiapplication, didreceiveremotenotification userinfo: [nsobject : anyobject]) {         pfpush.handlepush(userinfo)         if application.applicationstate == uiapplicationstate.inactive {             pfanalytics.trackappopenedwithremotenotificationpayload(userinfo)         }     }      ///////////////////////////////////////////////////////////     // uncomment method if want use push notifications background app refresh     ///////////////////////////////////////////////////////////     // func application(application: uiapplication, didreceiveremotenotification userinfo: [nsobject : anyobject], fetchcompletionhandler completionhandler: (uibackgroundfetchresult) -> void) {     //     if application.applicationstate == uiapplicationstate.inactive {     //         pfanalytics.trackappopenedwithremotenotificationpayload(userinfo)     //     }     // }      //--------------------------------------     // mark: facebook sdk integration     //--------------------------------------      ///////////////////////////////////////////////////////////     // uncomment method if using facebook     ///////////////////////////////////////////////////////////     // func application(application: uiapplication, openurl url: nsurl, sourceapplication: string?, annotation: anyobject?) -> bool {     //     return fbappcall.handleopenurl(url, sourceapplication:sourceapplication, session:pffacebookutils.session())     // } } 

//************************

and viewcontroller.swift used code :

import uikit import parse

class viewcontroller: uiviewcontroller {

override func viewdidload() {     super.viewdidload()       var gamescore = pfobject(classname:"gamescore")     gamescore["score"] = 1337     gamescore["playername"] = "sean plott"     gamescore["cheatmode"] = false     gamescore.saveinbackgroundwithblock {         (success: bool, error: nserror?) -> void in         if (success) {             // object has been saved.         } else {             // there problem, check error.description         }     }  }     override func didreceivememorywarning() {     super.didreceivememorywarning()     // dispose of resources can recreated. } 

}

parse has documentation , here can find how save objects. switch programming language swift.

as error getting seems have parameter. if want handle response block should using method: + subscribetochannelinbackground:block:. reference can read documentation.

edit: try nserror? instead of nserror!. should have this:

pfpush.subscribetochannelinbackground("", block: { (succeeded: bool, error: nserror?) -> void in         if succeeded {             println("parsestarterproject subscribed push notifications on broadcast channel.");         } else {             println("parsestarterproject failed subscribe push notifications on broadcast channel error = %@.", error)         }     })