获取蓝牙Mac地址
func getBleMAcAdressWithData(data :NSData) -> NSString{
var array = [UInt8](repeating: 0,count:data.length)
data.getBytes(&array, length: data.length)
let macString = NSMutableString()
for index in 2...(data.length-1){
let str = NSString(format: "%02x", array[index]) as String
macString.append(str)
}
return macString
}
