MKMapView showsuserlocation

In my app I have a rare bug that stops showing the userlocation. If I tone the app down and just have the map, and set everything up in the viewDidLoad, and at the end do the typical:

myMapView.showsUserLocation = YES;

everything works great 99% of the time. It always works when t开发者_高级运维he App is starting from scratch, but like 1 time out of 100, when resuming from the background, the userlocation doesn't show. And even if I make a button to turn showsUserLocation back on, it still won't show (and upon doing NSLog's the property shows that it is set to YES in the MKMapView). If I kill the program, and start it again, it works fine again.

Everything is being done in the main thread as well.

Anyone encounter anything like this?

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you can refer this image for fetch location in backgroud Mode