How to run NSTimer in background and sleep in iOS?

Question

I found a lot of post in stackoverflow about NSTimer run in background.

However I didn\'t find any solution.

In my app , I play sound in background

Answer 1

With Swift

let app = UIApplication.sharedApplication()
app.beginBackgroundTaskWithExpirationHandler(nil)
let timer = NSTimer.scheduledTimerWithTimeInterval(1,
            target: self,
            selector:"DoSomethingFunctions",
            userInfo: nil,
            repeats: true)
NSRunLoop.currentRunLoop().addTimer(timer, forMode: NSRunLoopCommonModes)