Unity+PlayFab c#顺序执行

Question

请注意C#语法，我正在对PlayFab执行Rest调用，以获取一个播放器配置文件，然后将播放器显示名称分配给一个本地公共变量，但是在执行过程中，我发现它们根本不是顺序的。我不明白为什么像python或java一样，所有函数都是顺序的，它们将在另一个函数完成后执行。

根据逻辑，它应该使用OnLoginWithGoogleAccountPlayFab执行开始函数，该函数将调用GetPlayerProfile，获取播放器名称并在公共字符串PlayerDisplayName，上赋值，然后调用ChangeSceneOnNewPlayer，后者将检查名称是否为null。

但它以这种方式执行在这里输入图像描述

public PlayerDisplayName;
void Start(){
        OnLoginWithGoogleAccountPlayFab();
}
public void OnLoginWithGoogleAccountPlayFab() {
        PlayFabClientAPI.LoginWithGoogleAccount(new LoginWithGoogleAccountRequest()
        {
            TitleId = PlayFabSettings.TitleId,
            ServerAuthCode = AuthCode,
            CreateAccount = true
        }, (result) =>
        {
            PlayFabId = result.PlayFabId;
            SessionTicket = result.SessionTicket;
            Debug.LogWarning("waaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrr- --------------------- GET PROFILE 1");
            GetPlayerProfile();
            Debug.LogWarning("waaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrr- ---------------------NAME 1 ");
            ChangeSceneOnNewPlayer();
        }, OnPlayFabError);
    }

public void GetPlayerProfile() {
        PlayFabClientAPI.GetPlayerProfile(new GetPlayerProfileRequest()
        {
            PlayFabId = PlayFabId,
            ProfileConstraints = new PlayerProfileViewConstraints()
            {
                ShowDisplayName = true,
            }
        }, (result) =>
        {
            Debug.LogWarning("waaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrr- ---------------------PROFILE 2");
            Debug.Log("The player's DisplayName profile data is: " + result.PlayerProfile.DisplayName);
            PlayerDisplayName = result.PlayerProfile.DisplayName;
            Debug.LogWarning("waaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrr- ---------------------PROFILE 3");
        }, OnPlayFabError);
    }

public void ChangeSceneOnNewPlayer() {
        Debug.Log("Player Info");
        Debug.LogWarning("waaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrr- ---------------------NAME 2 ");
        if (PlayerDisplayName == null) {
            Debug.Log("Player Info is NULL " + PlayerDisplayName);
            Debug.LogWarning("waaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrr- ---------------------NAME 3 ");
            SceneManager.LoadSceneAsync("New_Player", LoadSceneMode.Single);
        } else {
            Debug.Log("Player Info NOT null " + PlayerDisplayName);
            Debug.LogWarning("waaaaaaaaaaaaaaaaaaaaaarrrrrrrrrrrr- ---------------------NAME 3 ");
            SceneManager.LoadSceneAsync("City", LoadSceneMode.Single);
        }
    }

Answer 1

您的方法将按顺序执行，但返回的结果将异步返回。这在代码中引入了竞争条件，也是在收到播放机配置文件之前看到正在执行的ChangeSceneOnNewPlayer方法的原因。

让我们在下面的行中详细分析正在发生的事情(为清晰起见删除了调试)：

// Both these lines execute synchronously.
PlayFabId = result.PlayFabId;
SessionTicket = result.SessionTicket;

// Here you're invoking a synchronous method, but inside the method
// an asynchronous call is made to PlayFab, and the result will not be immediately
// returned.
GetPlayerProfile();

// Then you immediately call this method, but you haven't waited for the result from 
// PlayFab before you make this call.
ChangeSceneOnNewPlayer();

你想要的是这样的东西：

public PlayerDisplayName;

void Start()
{
    OnLoginWithGoogleAccountPlayFab();
}

public void OnLoginWithGoogleAccountPlayFab()
{
    PlayFabClientAPI.LoginWithGoogleAccount(new LoginWithGoogleAccountRequest()
    {
        TitleId = PlayFabSettings.TitleId,
        ServerAuthCode = AuthCode,
        CreateAccount = true
    }, (result) =>
    {
        PlayFabId = result.PlayFabId;
        SessionTicket = result.SessionTicket;

        // Get the profile, and specify a callback for when the result is returned
        // from PlayFab.
        GetPlayerProfile(OnGetPlayerProfile);
    }, OnPlayFabError);
}

public void GetPlayerProfile(Action<PlayerDisplayName> onGetPlayerDisplayName)
{
    PlayFabClientAPI.GetPlayerProfile(new GetPlayerProfileRequest()
    {
        PlayFabId = PlayFabId,
        ProfileConstraints = new PlayerProfileViewConstraints()
        {
            ShowDisplayName = true,
        }
    }, onGetPlayerDisplayName, OnPlayFabError);
}

// This method is used as a callback to your GetPlayerProfile function and is used
// to process the information.
public void OnGetPlayerProfile(PlayerDisplayName playerDisplayName)
{
    PlayerDisplayName = playerDisplayName;
    if (PlayerDisplayName == null)
    {
        SceneManager.LoadSceneAsync("New_Player", LoadSceneMode.Single);
    }
    else
    {
        SceneManager.LoadSceneAsync("City", LoadSceneMode.Single);
    }
}

这是使用任何RESTful API调用时的标准模式。