title: iOS - Scan BLE devies in background
body: <p>I have noticed that scanForPeripheralsWithServices is not working in background. I tried with following:</p>
  
  <ol>
  <li>specified UUID and option nil</li>
  <li>set  UIBackgroundModes bluetooth-central and bluetooth-peripheral info.plist</li>
  </ol>
  
  <p>I want a background service that should scan BLE devices in background continuously.
  Thanks for your help!</p>