Simple timer with rxSwift

Question

I am trying to play a simple timer using RxSwift.

I only have a pause / play button that works to pause and resume.

  gameTimer = Observable<NSInteger>.interval(1, scheduler: MainScheduler.instance) .subscribeNext({ sec -> Void in print("\(sec) s") }).addDisposableTo(disposeBag!) pauseResumeButton.rx_tap .map{ !self.isRunning.value } .startWith(true) .bindTo( isRunning ) .addDisposableTo(disposeBag!) 

isRunning is a < Bool > variable, obviously. I can stop the timer settings of disposeBag = nil but I can not pause it .... tried to filter events, but obviously the score continues to grow ...

Can someone help me? Thanks!

Answer 1

A little trick:

 class ViewController: UIViewController { let isRunning = Variable(true) override func viewDidLoad() { super.viewDidLoad() isRunning.asObservable() .debug("isRunning") .flatMapLatest { isRunning in isRunning ? Observable<Int>.interval(1, scheduler: MainScheduler.instance) : .empty() } .flatMapWithIndex { (int, index) in Observable.just(index) } .debug("timer") .subscribe() .addDisposableTo(disposeBag) navigationItem.rightBarButtonItem!.rx.tap .subscribe(onNext: { [unowned self] in self.isRunning.value = !self.isRunning.value }) .addDisposableTo(disposeBag) } } 

Result:

 2016-12-17 20:53:11.408: timer -> subscribed 2016-12-17 20:53:11.414: isRunning -> subscribed 2016-12-17 20:53:11.415: isRunning -> Event next(true) 2016-12-17 20:53:12.503: timer -> Event next(0) 2016-12-17 20:53:13.488: timer -> Event next(1) 2016-12-17 20:53:14.488: timer -> Event next(2) 2016-12-17 20:53:15.488: timer -> Event next(3) 2016-12-17 20:53:16.154: isRunning -> Event next(false) 2016-12-17 20:53:23.155: isRunning -> Event next(true) 2016-12-17 20:53:24.223: timer -> Event next(4) 2016-12-17 20:53:25.229: timer -> Event next(5) 2016-12-17 20:53:26.228: timer -> Event next(6) 2016-12-17 20:53:27.220: timer -> Event next(7) 2016-12-17 20:53:28.225: timer -> Event next(8) 2016-12-17 20:53:29.221: timer -> Event next(9) 2016-12-17 20:53:29.971: isRunning -> Event next(false)