ios - Parse switching view controller on sucessful login -

after user logs in sucessfully, need switch view controllers timeline section of app, going tab bar view controller 5 different tabs @ bottom. here code have far, works , connected parse database have setup. import uikit import parse

class loginviewcontroller: uiviewcontroller {  @iboutlet var usernamefield: uitextfield! @iboutlet var passwordfield: uitextfield!  override func viewdidload() {     super.viewdidload()      // additional setup after loading view. }  override func didreceivememorywarning() {     super.didreceivememorywarning()     // dispose of resources can recreated. } @ibaction func logintapped(sender: anyobject) {      let username = usernamefield.text     let password = passwordfield.text      pfuser.loginwithusernameinbackground(username, password:password) {         (user: pfuser?, error: nserror?) -> void in         if user != nil {             println("success")         } else {             var loginerror:uialertview = uialertview(title: "invalid login", message: "i did not recognize credentials. try again?", delegate: self, cancelbuttontitle: "dismiss")             loginerror.show()         }     } }  @ibaction func closetapped(sender: anyobject) {     dismissviewcontrolleranimated(true, completion: nil) } } 

in line println("sucessful"), instead of printing out sucessful login need switch timeline home (the tab bar view controller).

use segue transition new view controller if login successful:

if user != nil {   self.performseguewithidentifier("successfulloginpage", sender: self) 

}