iOS之获取蓝牙Mac地址_ios蓝牙device id转mac

在做iOS蓝牙开发的时候肯定会遇到这种问题，苹果自带的CoreBluetooth SDK中不能获取到蓝牙的Mac地址，只能得到UUID，但是UUID并不是唯一的，换一个设备再连接UUID就不一样了。而且Android手机是可以获取到Mac地址的，不能很好的兼容Android手机，Android是不可能获取到UUID，为了很好的兼容，只能iOS想办法获取Mac地址了。幸运的是iOS也不是没有办法获取到Mac地址。
主要思路

虽然苹果官方的API没有获取Mac地址的方法，但是当我翻看蓝牙的文档的时候，我发现蓝牙有提供一个设备信息的service［service UUID：0x180A］,里面提供了两个characteristic：获取芯片的Mac地址（0x2A23 ）和获取软件的版本号（0x2A26）。如下图所示：

实现

- (void)getMacAddress:(MPPeripheral *)mPeripheral
{
    CBUUID *macServiceUUID = [CBUUID UUIDWithString:@"180A"];
    CBUUID *macCharcteristicUUID = [CBUUID UUIDWithString:@"2A23"];
    [mPeripheral discoverServices:@[macServiceUUID] withBlock:^(MPPeripheral *peripheral, NSError *error) {
        if(peripheral.services.count){
            MPService *service = [peripheral.services objectAtIndex:0];
            [service discoverCharacteristics:@[macCharcteristicUUID] withBlock:^(MPPeripheral *peripheral, MPService *service, NSError *error) {
                for(MPCharacteristic *characteristic in service.characteristics){
                    if([characteristic.UUID isEqual:macCharcteristicUUID]){
                        [characteristic readValueWithBlock:^(MPPeripheral *peripheral, MPCharacteristic *characteristic, NSError *error){
                            NSString *value = [NSString stringWithFormat:@"%@",characteristic.value];
                            NSMutableString *macString = [[NSMutableString alloc] init];
                            [macString appendString:[[value substringWithRange:NSMakeRange(16, 2)] uppercaseString]];
                            [macString appendString:@":"];
                            [macString appendString:[[value substringWithRange:NSMakeRange(14, 2)] uppercaseString]];
                            [macString appendString:@":"];
                            [macString appendString:[[value substringWithRange:NSMakeRange(12, 2)] uppercaseString]];
                            [macString appendString:@":"];
                            [macString appendString:[[value substringWithRange:NSMakeRange(5, 2)] uppercaseString]];
                            [macString appendString:@":"];
                            [macString appendString:[[value substringWithRange:NSMakeRange(3, 2)] uppercaseString]];
                            [macString appendString:@":"];
                            [macString appendString:[[value substringWithRange:NSMakeRange(1, 2)] uppercaseString]];
                            NSLog(@"macString:%@",macString);
                        }];
                    }
                }
                
            }];
        }
    }];
}