iphone - NSTimer stops in the background after some time -


i used nstimer call method after 1 sec when app goes in background , after 17 minutes timer stops working.

when came in foregound again started working, please tell me why happening , how resolve issue.

i tried using perform selector delay in recursion same purpose, again giving same result. please suggest solution. appreciated.

wierd issue- had one, following worked me.

 //run timer on runloop ensure works when app in background    [[nsrunloop currentrunloop]addtimer:self.timer formode: nsdefaultrunloopmode];

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