iOS-判断蓝牙是否打开

http://blog.csdn.net/nogodoss/article/details/41313129    CBCentralManager  (客户端)

http://www.2cto.com/kf/201508/435766.html              CBPeripheralManager  (服务端)

http://doc.okbase.net/kw-ios/archive/94529.html   对比