How to create a NSMutableDictionary in Swift? -

i'm trying create nsmutabledictionary use key chain in ios, i'm getting following error.

could not find overload 'init' accepts supplied arguments

this code i'm using:

var keychainquery: nsmutabledictionary = nsmutabledictionary(objects: [ksecclassgenericpassword, service, useraccount, kcfbooleantrue, ksecmatchlimitone], forkeys: [ksecclass, ksecattrservice, ksecattraccount, ksecreturndata, ksecmatchlimit]) 

any idea causing this?

the complete code:

import uikit import security  let serviceidentifier = "myserivice" let useraccount = "authenticateduser" let accessgroup = "myserivice"  class keychainservice: nsobject {      class func savetoken(token: nsstring) {         self.save(serviceidentifier, data: token)     }      class func loadtoken() -> nsstring? {         var token = self.load(serviceidentifier)          return token     }      class func save(service: nsstring, data: nsstring) {         var datafromstring: nsdata = data.datausingencoding(nsutf8stringencoding, allowlossyconversion: false)         // instantiate new default keychain query         var keychainquery: nsmutabledictionary = nsmutabledictionary(objects: [ksecclassgenericpassword, service, useraccount, datafromstring], forkeys: [ksecclass, ksecattrservice, ksecattraccount, ksecvaluedata])          // delete existing items         secitemdelete(keychainquery cfdictionaryref)          // add new keychain item         var status: osstatus = secitemadd(keychainquery cfdictionaryref, nil)     }      class func load(service: nsstring) -> nsstring? {         // instantiate new default keychain query         // tell query return result         // limit our results 1 item         var keychainquery: nsmutabledictionary = nsmutabledictionary(objects: [ksecclassgenericpassword, service, useraccount, kcfbooleantrue, ksecmatchlimitone], forkeys: [ksecclass, ksecattrservice, ksecattraccount, ksecreturndata, ksecmatchlimit])          var datatyperef :unmanaged<anyobject>?          // search keychain items         let status: osstatus = secitemcopymatching(keychainquery, &datatyperef)          let opaque = datatyperef?.toopaque()          var contentsofkeychain: nsstring?          if let op = opaque? {             let retrieveddata = unmanaged<nsdata>.fromopaque(op).takeunretainedvalue()              // convert data retrieved keychain string             contentsofkeychain = nsstring(data: retrieveddata, encoding: nsutf8stringencoding)         } else {             println("nothing retrieved keychain. status code \(status)")         }          return contentsofkeychain     } } 

for code can use nsdictionary way:

    var keychainobjects = nsarray(objects:"\(ksecclassgenericpassword)", service, useraccount, datafromstring)     var keychainvalues = nsarray(objects:"\(ksecclass)","\(ksecattrservice)", "\(ksecattraccount)","\(ksecvaluedata)")     let keychainquery = nsdictionary(objects: keychainobjects, forkeys: keychainvalues)