操作方法：登录用户的最佳做法

演示如何以无提示方式获取默认用户的示例

游戏需要建立初始用户。 此示例演示如何尽快地实现此操作。 如果你的游戏菜单需要向用户显示可明确其身份的问候语，并且你不希望立即显示 UI，则通常需要遵循此模式。

HRESULT Identity_TrySignInDefaultUserSilently(_In_ XTaskQueueHandle asyncQueue)
{
    XAsyncBlock* asyncBlock = new XAsyncBlock();
    asyncBlock->queue = asyncQueue;
    asyncBlock->callback = Identity_TrySignInDefaultUserSilently_Callback;

    // Request to silently sign in the default user.
    HRESULT hr = XUserAddAsync(XUserAddOptions::AddDefaultUserSilently, asyncBlock);

    if (FAILED(hr))
    {
        delete asyncBlock;
    }

    return hr;
}

void CALLBACK Identity_TrySignInDefaultUserSilently_Callback(_In_ XAsyncBlock* asyncBlock)
{
    // NOTE: XUserAddResult will add a Ref to the passed-in XUserHandle.
    XUserHandle newUser = nullptr;
    HRESULT hr = XUserAddResult(asyncBlock, &newUser);

    if (SUCCEEDED(hr))
    {
        // TO DO: create Xbox services context and do something with that user.
        // ...
    }
    else 
    {
        // You are here because there's no default user or because of an error.
        // Display some UI, such as "Press A or Enter to continue," and try the sign-in with the UI flow.
    }

    delete asyncBlock;
}

演示如何获取初始用户的示例

与上一个示例一样，游戏需要建立初始用户。 在这种情况下，游戏希望在请求用户时显示 UI。 只有在系统无法确定默认用户时，才会显示 UI。

HRESULT Identity_TrySignInDefaultUser(_In_ XTaskQueueHandle asyncQueue)
{
    XAsyncBlock* asyncBlock = new XAsyncBlock();
    asyncBlock->queue = asyncQueue;
    asyncBlock->callback = Identity_TrySignInDefaultUser_Callback;

    // Request to silently sign in the default user.
    HRESULT hr = XUserAddAsync(XUserAddOptions::AddDefaultUserAllowingUI, asyncBlock);

    if (FAILED(hr))
    {
        delete asyncBlock;
    }

    return hr;
}

void CALLBACK Identity_TrySignInDefaultUser_Callback(_In_ XAsyncBlock* asyncBlock)
{
    // NOTE: XUserAddResult will add a Ref to the passed-in XUserHandle.
    XUserHandle newUser = nullptr;
    HRESULT hr = XUserAddResult(asyncBlock, &newUser);

    if (SUCCEEDED(hr))
    {
        // TO DO: create Xbox services context and do something with that user.
        // ...
    }
    else
    {
        // You are probably here because someone canceled out of the UI flow to 
        // sign in or an expected error occurred.
        // Display some UI, such as "Press A or Enter to continue," and try the sign-in 
        // again with the UI flow.
    }

    delete asyncBlock;
}

另请参阅

用户标识和 XUser