iOS如果获取蓝牙Mac地址

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

根据这个思路：

[peripheral discoverServices:@[[CBUUID UUIDWithString:@"180A"]]];
[service discoverCharacteristics:@[[CBUUID UUIDWithString:@"2A23"]]];
[peripheral readValueForCharacteristic:characteristic]
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]];
//00:E0:4C:3F:14:DE

这里可一个大家推荐一个非常好用的蓝牙开发的库，跟CoreBluetooth的接口一摸一样，只是数据是用过block返回的，用起来更加的方便。MPBluetoothKit
Github地址

下面是写的MPBluetoothKit 获取Mac地址的代码

    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);}];}}}];}}];