How to add background infinite timer with background mode BLE Central in IOS? <p>I want to keep my app can fire timer at specific time even when in background,now my app use BLE Central background mode, and I need to send some data to blue peripheral at a specific time, how to implement this? Now the timer selector seems can only be fired when enter back to foreground. I use Xcode 6.3, tested both on iOS 8.1.3 and iOS 8.3.</p>