Call every second a function using swift

// anwswer to http://stackoverflow.com/questions/41915285/polling-with-rxswift-and-parse-server
func myObs() -> Observable<Int> {
    return Observable<Int>.create { observer in
        
        let sig = Observable<Int>.interval(1.0, scheduler: MainScheduler.instance)
        
        let subscription =
            sig.subscribe(onNext: { num in
                observer.onNext(num)
                if num == 10 {
                    observer.onCompleted()
                }
            })
        
        return Disposables.create {
            subscription.dispose()
        }
    }
}
        
        
        
let _  = myObs().subscribe(onNext: {num in
    print(num)
})
// OUTPUT
// 0
// 1
// 2
// 3
// 4
// 5
// 6
// 7
// 8
// 9
// 10