iOS蓝牙开发（一）蓝牙相关基础知识

MFI ======= make for ipad ,iphone, itouch 专们为苹果装备制作的装备
BLE ==== buletouch low energy，蓝牙4.0装备由于低耗电，所以也叫做BLE
peripheral,central == 外设和中心,发起连接的时central，被连接的装备为perilheral
service and characteristic === 服务和特点每一个装备会提供服务和特点，类似于服务真个api，但是机构不同。每一个外设会有很多服务，每一个服务中包括很多字段，这些字段的权限1般分为读read，写write，通知notiy几种，就是我们连接装备后具体需要操作的内容。
Description 每一个characteristic可以对应1个或多个Description用户描写characteristic的信息或属性
MFI === 开发使用ExternalAccessory 框架
4.0 BLE === 开发使用CoreBluetooth 框架

  //objcetive c特点的定义枚举
  typedef NS_OPTIONS(NSUInteger, CBCharacteristicProperties) {
      CBCharacteristicPropertyBroadcast												= 0x01,
      CBCharacteristicPropertyRead													= 0x02,
      CBCharacteristicPropertyWriteWithoutResponse									= 0x04,
      CBCharacteristicPropertyWrite													= 0x08,
      CBCharacteristicPropertyNotify													= 0x10,
      CBCharacteristicPropertyIndicate												= 0x20,
      CBCharacteristicPropertyAuthenticatedSignedWrites								= 0x40,
      CBCharacteristicPropertyExtendedProperties										= 0x80,
      CBCharacteristicPropertyNotifyEncryptionRequired NS_ENUM_AVAILABLE(NA, 6_0)		= 0x100,
      CBCharacteristicPropertyIndicateEncryptionRequired NS_ENUM_AVAILABLE(NA, 6_0)	= 0x200
  };