Unity 中的 Firebase - 禁用持久性 [英] Firebase in Unity - Disable persistence

问题描述

我正在使用 Firebase 为 Android 制作一款手机游戏.该游戏有一个系统，允许玩家离线玩游戏并根据保存的日期时间更新/检索数据库中的数据.

I'm making a mobile game for Android using Firebase. This game has a system that allows the player to play offline and update/retrieve data from the database depending on the saved date-time.

这个日期时间(写在本地文件中)应该与保存在数据库中的日期时间相同，为此我写了这个:

This date-time (written in a local file) should be the same as the one saved in the database, and to do so I wrote this:

reference.Child("users/"+this.id+"/updateDate").SetValueAsync(updateDate).ContinueWith(task =>
{
    if (task.IsCompleted) {
        Debug.Log("Setting new update date into file: "+updateDate);
        this.lastUpdateDate = updateDate;
        WriteFile();
    }
});

问题是，即使没有互联网连接，该值也会被修改，但永远不会满足以下条件，所以会发生以下情况:如果您读取该值，即使没有互联网连接，您也会读取新"日期时间，而文件仍包含旧"日期时间(实际在数据库中的日期时间).

The problem is that, even if there is no internet connection, the value gets modified but the condition below is never satisfied so what happens is this: If you read the value, even without internet connection, you read the "new" date-time, while the file still contains the "old" one (the one actually in the database).

我知道最好的解决方案是删除所有内容并让离线持久性发挥作用，但我做了一些测试，它甚至不适用于 Android 的构建.所以我的问题如下:

I know the best solution is to delete everything and let offline persistence do its work, but I did a couple tests and it doesn't even work on Android's build. So my question is the following:

有没有办法在 Unity 中禁用离线持久性?

因为我已经尝试了 "FirebaseDatabase.DefaultInstance.setPersistenceEnabled(false)" 但似乎该函数甚至不存在于 Unity 的 API 中(它给了我编译错误).

Because I've tried "FirebaseDatabase.DefaultInstance.setPersistenceEnabled(false)" but it seems like that function is not even present in the Unity's API (it gives me compile errors).

感谢您的帮助！

推荐答案

要禁用持久性，请执行以下操作:

To disable persistence, do:

Firebase.FirebaseDatabase.DefaultInstance.SetPersistenceEnabled(false);

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如果您来自 Google，并且无法初始化持久性存储"使用 2 个编辑器测试 Unity 时崩溃，请执行

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If you're coming from Google with the "Failed to initialize persistence storage" crash when testing Unity with 2 editors, do

#if UNITY_EDITOR
  Firebase.FirebaseDatabase.DefaultInstance.SetPersistenceEnabled(false);
#endif

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