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

// NSTimer run when app in background 


[[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];
loop = [NSTimer scheduledTimerWithTimeInterval:0.25 target:self selector:@selector(Update) userInfo:nil repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:loop forMode:NSRunLoopCommonModes];

This is what do you want?.