Method in NSTimer Selector is invalid

Question

self.presentViewController(playerViewController, animated: true){
        self.playerViewController.player?.play()
        self.playerTimer = NSTimer.scheduledTimerWithTimeInterval(4, target: self, selector:Selector("stopAfter4seconds:"), userInfo: nil, repeats: false)
    }

    func stopAfter4seconds(timer: NSTimer){
    self.playerViewController.player?.pause()
    self.playerViewController.player = nil
    self.dismissViewControllerAnimated(true, completion: nil)
    self.presentViewController(GameViewController1(), animated: true, completion: nil)
    }
}

So.. I've tried just about everything to get this NSTimer to work and nothing seems to go correctly. I've tried:

Adding & Removing colon in between
```
("stopAfter4seconds:")
```
Adding & Removing the (timer:NSTimer) in the parameter of the
```
stopAfter4seconds()
```

Adding & Removing the second Selector in

selector:Selector("stopAfter4seconds:")

Errors I'm getting:

stopAfter4seconds]: unrecognized selector sent to instance 0x7bb1ae90
Terminating app due to uncaught exception 'NSInvalidArgumentException'
Thread 1 : signal SIGABRT

I have no idea what I'm doing wrong so please if anyone has any idea let me know.

I couldn't get what you want to do. – fatihyildizhan Nov 27 '15 at 22:25 — fatihyildizhan, Nov 27 '15 at 22:25
Check this one: http://stackoverflow.com/a/27435406/2125010 – fatihyildizhan Nov 27 '15 at 22:47 — fatihyildizhan, Nov 27 '15 at 22:47

fatihyildizhan · Answer 1 · 2015-11-27T22:26:45.983

1

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func viewDidAppear(animated: Bool) {
        print("run viewDidAppear")
        myFunction1()
    }


    func myFunction1() {
        print("call timer")
        NSTimer.scheduledTimerWithTimeInterval(1.0, target: self, selector: Selector("myFunction2"), userInfo: nil, repeats: false)
    }

    func myFunction2(){
        print("do stuff")
    }
}

edited Nov 27 '15 at 22:26

answered Nov 27 '15 at 22:17

fatihyildizhan

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My NStimer is in the method override func viewDidAppear(animated:Bool) – AlrightyRob Nov 27 '15 at 22:21
should I move all the code to a new method, then call that method into the viewDidAppear? – AlrightyRob Nov 27 '15 at 22:21
I guess so, try to move your function into class. – fatihyildizhan Nov 27 '15 at 22:22
moved my function into the entire class view at the top, it did not seem to help – AlrightyRob Nov 27 '15 at 22:35
Can you explain briefly when do you want to run `NSTimer?` After closing the `presentViewController` ? – fatihyildizhan Nov 27 '15 at 22:40
Yes, My goal is to Run the NSTimer after 4 seconds (i.e. how long the video is), then present another view. – AlrightyRob Nov 27 '15 at 22:41
Got it!!! It was a combination moving the function to the entire class view and adding the colon back to the selector :) thanks again – AlrightyRob Nov 27 '15 at 23:06

score 1 · Accepted Answer · answered Nov 27 '15 at 23:25

If the method is defined like so:

func stopAfter4seconds(timer: NSTimer) { ... }

Then you'd create the timer like so:

NSTimer.scheduledTimerWithTimeInterval(4, target: self, selector: Selector("stopAfter4seconds:"), userInfo: nil, repeats: false)

Or you can omit Selector() and just do:

NSTimer.scheduledTimerWithTimeInterval(4, target: self, selector: "stopAfter4seconds:", userInfo: nil, repeats: false)

It would appear, though, that you've implemented this stopAfter4seconds function inside the method that called presentViewController. This stopAfter4seconds, itself, must be a method, not defined inside another method.

Method in NSTimer Selector is invalid

2 Answers2