1.建立中心角色
#import
CBCentralManager *manager; manager = [[CBCentralManager alloc] initWithDelegate:selfqueue:nil];
2.判断手机蓝牙状态
//当手机的蓝牙状态发生改变时，调用该方法
-(void)centralManagerDidUpdateState:(CBCentralManager*)central{ if(central.state==CBCentralManagerStatePoweredOn){ //当蓝牙状态为开时 扫描外设 [self.manager scanForPeripheralsWithServices:nil options:nil]; } }
3.当扫描到外设调用方法
-(void)centralManager:(CBCentralManager*)central didDiscoverPeripheral:(CBPeripheral*)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber*)RSSI
{
//连接外设
[self.manager connectPeripheral:peripheral options:nil];
}
4.连接成功时调用方法
-(void)centralManager:(CBCentralManager*)central didConnectPeripheral:(CBPeripheral*)peripheral
{//停止扫描
[self.manager stopScan];
//设置外设的代理回调
peripheral.delegate=self;
//按照指定的UUID查找外设中的对应服务
[self.peripheraldiscoverServices:@[[CBUUIDUUIDWithString:@"蓝牙外设服务UUID"]]];
}
5找到相关服务时 调用方法
-(void)peripheral:(CBPeripheral*)peripheral didDiscoverServices:(NSError*)error
{
for(CBService*serviceinperipheral.services)
{
//在外设中所有的服务中找到准备查询的服务
if([service.UUIDisEqual:[CBUUIDUUIDWithString:@"蓝牙外设服务UUID"]]) {
//获得服务中的特征
[peripheraldiscoverCharacteristics:@[[CBUUIDUUIDWithString:@"蓝牙外设服务特征UUID"]]forService:service];
}
}
}
//当找到相关服务时，调用该方法
-(void)peripheral:(CBPeripheral*)peripheral didDiscoverServices:(NSError*)error
{
for(CBService*serviceinperipheral.services)
{
//在外设中所有的服务中找到准备查询的服务
if([service.UUIDisEqual:[CBUUIDUUIDWithString:@"服务UUID"]]) {
//获得服务中的特征
[peripheraldiscoverCharacteristics:@[[CBUUIDUUIDWithString:@"特征UUID"]]forService:service];
}
}
}
//获得特征里边的数据
-(void)peripheral:(CBPeripheral*)peripheral didUpdateValueForCharacteristic:(CBCharacteristic*)characteristic error:(NSError*)error
{ NSLog(@"%@",characteristic.value); }
-(void)peripheral:(CBPeripheral*)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic*)characteristic error:(NSError*)error
{
if(characteristic.isNotifying) {
NSLog(@"%@",characteristic);
}
else
{
//断开与外设的连接
[self.managercancelPeripheralConnection:peripheral];
}
}