处理游戏状态更改

本主题提供用于处理设备状态更改的示例代码。

订阅游戏状态更改

扁平 C API

uint64_t xuid{ 123 };

HRESULT hr = XblPresenceSubscribeToTitlePresenceChange(
    xboxLiveContext,
    xuid,
    titleId,
    &state.titlePresenceChangeSubscription
);

取消订阅游戏状态更改

扁平 C API

HRESULT hr = XblPresenceUnsubscribeFromTitlePresenceChange(
    xboxLiveContext,
    state.titlePresenceChangeSubscription
);

state.titlePresenceChangeSubscription = nullptr;

添加游戏状态更改处理程序

扁平 C API

state.titlePresenceChangedHandlerToken =  XblPresenceAddTitlePresenceChangedHandler(
    xboxLiveContext,
    [](void* context, uint64_t xuid, uint32_t titleId, XblPresenceTitleState titleState)
    {
        UNREFERENCED_PARAMETER(context);
        LogToFile("Title presence change notification received:");
        LogToFile("Xuid = %u, titleId = %u, titleState = %u", xuid, titleId, titleState);
    },
    nullptr
);

有关详细信息，请参阅XblPresenceTitleState。

删除游戏状态更改处理程序

扁平 C API

HRESULT hr = XblPresenceRemoveTitlePresenceChangedHandler(
    xboxLiveContext,
    state.titlePresenceChangedHandlerToken
);

state.titlePresenceChangedHandlerToken = 0;