title: iOS app with iBeacon must restart device
body: <p>I built a simple ios app with IBeacon . I ran this app on an iPhone 4s whit ios7.1 while running an IBeacon base station.Everything is working right in background or foreground(exit region have 30 seconds delay in background).But over a period of time,about 3 hours,this app can not monitor any event though device setting were not change(blueTooth and locate is normal).This situation must restart the device.</p>
  
  <p>Please tell me what should i do aboult this situation?
  Thanks!</p>