组织字典以交换数据的最佳方式是什么？

Question

In unity I have a dictionary where I keep a lot of data. I'll need to access the data, read it, and sometimes overwrite it . I have it inside a class that's written more or less like

public class myClass
{
    public int myNumber;
    public string myString;
}

public class MyData : MonoBehaviour
{
    public Dictionary<string, myClass> someData = new Dictionary<string, myClass>();

    private void Awake()
    {
        someData.Add("one", new myClass() { myNumber = 1, myString = "first" });
        someData.Add("two", new myClass() { myNumber = 2, myString = "second" });
        someData.Add("three", new myClass() { myNumber = 3, myString = "third" });
    }
}

To avoid having to call gameObject.GetComponent<MyData>().someData everytime I need the Dictionary's data (since I need it across many GameObjects and scripts) I was thinking about setting the Dictionary as static which would allow to reference it with MyData.someData (and hopefully having better performance):

public static Dictionary<string, myClass> someData = new Dictionary<string, myClass>();

However, when I try accessing the Dictionary data in the Start method of other classes (that should therefore be executed after the Awake method of MyData ), MyData.someData is always null . I don't know if it has something to do with the calling order or if there's a problem with setting the Dictionary as static. I'm not experienced enough to understand.

Is static the correct usage here for the Dictionary? Or are there better solutions?

Moreover, if there's a Dictionary I only want to read but never modify, are there ways to define it so that it remains immutable?

Answer 1

instantiate the dictionary in Awake. add items to the dictionary in Start. Awake is always called before start so this will guarantee your dictionary is initialized before trying to access it.

Answer 2

Make the SomeData a static field and then you can call it as MyData.SomeData throughout your app. You need to explicitly call the Awake() method in order to add the three MyClass instances to SomeData dictionary. You can create a static constructor and call the Awake() inside it.

public class MyData : MonoBehaviour
{
    public static Dictionary<string, myClass> someData = new Dictionary<string, myClass>();

    static MyData()
    {
        Awake();
    }

    private static void Awake()
    {
        someData.Add("one", new myClass() { myNumber = 1, myString = "first" });
        someData.Add("two", new myClass() { myNumber = 2, myString = "second" });
        someData.Add("three", new myClass() { myNumber = 3, myString = "third" });
    }
}

There is a readonly dictionary in .NET 4.5... https://docs.microsoft.com/en-us/dotnet/api/system.collections.objectmodel.readonlydictionary-2?redirectedfrom=MSDN&view=netcore-3.1