ios - How to create an if statement with an array in swift? -

i trying make app uses login system. have created array both usernames , passwords. need test if password correct or not. how can create if statement tests values inside of array? here code in case need it.

import uikit  var namesarray = [string]() var passwordarray = [string]()  class viewcontroller: uiviewcontroller {      var username = "ege"     var password = "gürkan"     var truefalse = true      @iboutlet weak var idtextfield: uitextfield!     @iboutlet weak var passwordtextfield: uitextfield!     @iboutlet weak var truewronglabel: uilabel!      @ibaction func buttonpressed(sender: anyobject) {          if idtextfield.text == "ege" && passwordtextfield.text == "gürkan" {              self.performseguewithidentifier("geçiş", sender: self)          } else {              truewronglabel.text = "wrong id/pw"              idtextfield.resignfirstresponder()              passwordtextfield.resignfirstresponder()              truewronglabel.textcolor = uicolor.redcolor()              idtextfield.text = nil              passwordtextfield.text = nil          }     }      override func viewdidload() {         super.viewdidload()          nsuserdefaults.standarduserdefaults().setobject(namesarray, forkey: "namearray")          var recallednamearray = nsuserdefaults.standarduserdefaults().objectforkey("namearray")! nsarray          nsuserdefaults.standarduserdefaults().setobject(passwordarray, forkey: "passwordarray")         var recalledpasswordarray: anyobject? = nsuserdefaults.standarduserdefaults().objectforkey("passwordarray")             }      override func didreceivememorywarning() {         super.didreceivememorywarning()         // dispose of resources can recreated.     }         } 

in line says: if istextfield.text == "ege" want test if there value has user entered in textfield. how can it?

ps: new programming in general please don't use complicated terms while explaining

this beginning programming stuff.

there lots of ways this.

one straightforward way create struct contains name property , password property. create array of structs. when user enters username , password, use filter command find structure contains matching username, , check see if password correct.

if you're not comfortable swift filter function (i haven't used yet myself) loop through array looking matches.