问题描述
即使我的应用程序处于后台，也可以在蓝牙设备与iOS连接或断开连接时得到通知吗?在Android上，我使用ACTION_ACL_CONNECTED和ACTION_ACL_DISCONNECTED事件.但是我找不到适用于iOS的版本.
Is it possible to be notified when a Bluetooth Device is connected or disconnected from iOS even when my app is in background ?On Android, I use the ACTION_ACL_CONNECTED and ACTION_ACL_DISCONNECTED events. But I cannot find equivalents for iOS.
我找到了可用于监视蓝牙事件的CBCentralManager，但是当连接/断开蓝牙设备时，仅当我启用/禁用蓝牙时，才调用我的功能.是我这方面的错误还是正常?
I found the CBCentralManager that can be used to monitor Bluetooth events, but my functions aren't called when a bluetooth device is connected/disconnected, only when I enable/disable the bluetooth. Is it an error on my side or is it normal ?
我还找到了有关音频路由更改的文档，这也是检测蓝牙连接/断开连接的一个主意.只需检查新路由的种类并在那时检测连接的蓝牙设备即可.
I also found the doc about Audio Route changes, that can also be an idea to detect the bluetooth connections/disconnections. Just check the kind of new route and detect the connected bluetooth devices at that time.
在文档中，我还发现了NSNotification类型，如IOBluetoothHostControllerXXX，但没有任何解释.有人已经使用过它们吗?
In the doc, I also found NSNotification types like IOBluetoothHostControllerXXX but nothing is explained about them. Did someone already used them ?
还有更好的东西吗?还是我缺少什么?
Is there something better or am I missing something ?
推荐答案
通常您不会收到有关蓝牙外围设备连接和断开的通知.您可以获取您的应用连接到的BLE外围设备的连接和断开连接事件.
You cannot receive notifications about the connection and disconnection of Bluetooth peripherals generally. You can get connection and disconnection events for BLE peripherals that your app connects to.
例如，如果您的应用启动了与心率传感器的连接，则连接成功后，您将获得对CBCentralManagerDelegate连接功能的调用.如果该设备随后被关闭或超出范围，那么您将获得对断开连接委托方法的调用.
For example, if your app initiates a connection to a heart rate sensor then you will get a call to your CBCentralManagerDelegate connection function when the connection succeeds. If that device subsequently is switched off or goes out of range then you will get a call to the disconnection delegate method.
如果其他一些应用启动并建立了连接，那么您将不会得到回调.
If some other app initiates and makes the connection then you will not get a callback.
如前所述，您可以监视音频路由更改以推断已连接/断开了蓝牙音频设备，但是插入耳机时也会触发.
As you mentioned, you can monitor audio route changes to infer that a Bluetooth audio device has been connected/disconnected, but this will also fire when headphones are plugged in.
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