Perform segue when timer is finished

Question

I am trying to perform segue right after the timer reach 0. My code as below for the timer in the viewDidLoad:

override func viewDidLoad() {
        super.viewDidLoad()

        if timerRunning == false {
            timerCounter = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(Counting), userInfo: nil, repeats: true)
            timerRunning = true
        }

        if counter == 0 {
            timerRunning = false
        }

and this is the function counter:

func Counting() {

    counter -= 1
    timer.text = "\(counter)"
    if counter == 0 {
        timerCounter.invalidate()
        timerRunning = false
        self.performSegue(withIdentifier: "resultView", sender: self)
    }
}

You need to perform that segue operation on the main / UI thread I think. — luk2302, Jan 24 '17 at 13:34
Check to make sure you have given your segue the identifier `"resultView"`. — vacawama, Jan 24 '17 at 14:14
Are you running this in the simulator? What error is in the console log? — vacawama, Jan 24 '17 at 14:23
No in my phone, I got this error when I tried the below answer : libc++abi.dylib: terminating with uncaught exception of type NSException — Yousef humdan, Jan 24 '17 at 14:36

score 0 · Accepted Answer · answered Jan 24 '17 at 14:02

0

You simply need to perform the segue on the main thread. Use

DispatchQueue.main.async{
   self.performSegue(withIdentifier: "resultView", sender: self)
}

answered Jan 24 '17 at 14:02

mginn

16,036
4
26
54

I put this line inside if counter == 0 and it shows me this error: libc++abi.dylib: terminating with uncaught exception of type NSException – Yousef humdan Jan 24 '17 at 14:35
What's the exception? – mginn Jan 24 '17 at 15:57

score 0 · Answer 2 · answered Jan 24 '17 at 15:11

If you are certain the segue identifier is correct for both the performSegue call and in storyboards or xib, then perhaps self is somehow being deallocated before it should?

try this:

DispatchQueue.main.async{

    [weak self] in

    self?.performSegue(WithIdentifier:"resultView", sender: self)

}

Or try optional chaining self before running the performSegue just to be sure.

Perform segue when timer is finished

2 Answers2

Linked