Question

我正在尝试编写一个接收通知的BTLE监控应用。我使用Core Bluetooth（在iOS 7.1上）构建了中央应用程序和模拟外围应用程序。我的中心可以很好地连接到外围设备，它宣传具有2 CBCharacteristicPropertyNotify特征的服务。但是，一旦中心发现了这些特征（为了清晰起见，删除了非必要的代码），就会发生这种情况。

PD =中央的CBPeripheralDelegate

PMD =外设中的CBPeripheralManagerDelegate

调用PD回调

- (void)peripheral:(CBPeripheral *)peripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
{
    for (CBCharacteristic *characteristic in service.characteristics)
    {
        [peripheral setNotifyValue:YES forCharacteristic:characteristic];
    }
}

为2个特征调用了两次PMD回调

- (void)peripheralManager:(CBPeripheralManager *)peripheral central:(CBCentral *)central didSubscribeToCharacteristic:(CBCharacteristic *)characteristic
{
    if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:FILTER_GENUINE_CHARACTERISTIC_UUID]])
    {
        BOOL genuineSent = [self.peripheralManager updateValue:genuineValue
                                                     forCharacteristic:self.filterGenuineCharacteristic
                                                  onSubscribedCentrals:nil];
    }
    else if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:FILTER_LOADING_CHARACTERISTIC_UUID]])
    {
        BOOL loadingSent = [self.peripheralManager updateValue:loadingValue
                                                     forCharacteristic:self.filterLoadingCharacteristic
                                                  onSubscribedCentrals:nil];
    }
}

注意：第一次调用此方法时，updateValue:forCharacteristic:onSubscribedCentrals:的返回值为YES。第二次返回始终为NO。

针对2个特征调用了两次PD回调

- (void)peripheral:(CBPeripheral *)peripheral didUpdateNotificationStateForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error

注意：characteristic.isNotifying始终为YES。

但就是这样，没有调用其他回调方法！

返回peripheralManagerIsReadyToUpdateSubscribers:的{{1}}来电永远不会调用PMD回拨updateValue:forCharacteristic:onSubscribedCentrals:

NO

返回- (void)peripheralManagerIsReadyToUpdateSubscribers:(CBPeripheralManager *)peripheral的{{1}}来电永远不会调用PD回调peripheral:didUpdateValueForCharacteristic:error:

updateValue:forCharacteristic:onSubscribedCentrals:

我一直在运行iOS 7.1的iPad Air和iPhone 5s上测试这些应用程序。

知道为什么永远不会调用通知吗？

核心蓝牙特征通知不起作用

0 个答案: