我如何从 Unity3D 单一行为中引用由 class 组成的 class？

Question

我做了一个 class 来组织一些数据，还有一个 class 由几个 classes (Subclass?) 组成，所以我可以做一些类似...

classA.classB.value = 1;

但是我不知道如何引用我的 classes。如果有人知道我应该怎么做，那就太好了！

using UnityEngine;
using System.Collections.Generic;
using System.Collections;

class Gene {
    public string name;
    public float value;
    public float complexity;

    public Gene() {
        name = "";
        value = 0;
        complexity = 0;
    }

    public Gene(string Name, float Value, float Complexity) {
        name = Name;
        value = Value;
        complexity = Complexity;
    }
}

class Genome {
    public Gene agility;
    public Gene intelligence;
    public Gene strength;

    public Genome(){
        agility = new Gene();
        intelligence = new Gene();
        strength = new Gene();
    }

    public Genome(Gene Agility, Gene Intelligence, Gene Strength) {
        agility = Agility;
        intelligence = Intelligence;
        strength = Strength;
    }
    public IEnumerator GetEnumerator() {
        return (IEnumerator)this;
    }
}

public class Life : MonoBehaviour {
    Genome genome;      //Warning Life.genome is never assigned to, and will always have its default value null
    Quantity quantity;  //Warning Life.quantity is never assigned to, and will always have its default value null

    void OnEnable() {
        genome = /*???*/;   //How do I add the reference?
        quantity = /*???*/; //How do I add the reference?

        genome.agility.name = "Agility"; //On Runtime: NullReferenceException: Object reference not set to an instance of an object
        genome.agility.complexity = 100;

        genome.intelligence.name = "Intelligence";
        genome.intelligence.complexity = 1000;

        genome.strength.name = "Strength";
        genome.strength.complexity = 100;
    }
}

Answer 1

您必须使用 new 关键字来初始化 genome 和 quantity。当您尝试初始化的 class 不是从 MonoBehaviour 派生时，您可以使用 new 关键字进行初始化。您的 Genome 和 Quantity classes 不是从 MonoBehaviour 派生的，因此 new 关键字是初始化它们的正确方法。

Genome genome = null;
Quantity quantity = null;

void Start()
{
    //initialize
    genome = new Genome(new Gene("", 0, 0), new Gene("", 0, 0), new Gene("", 0, 0));
    quantity = new Quantity ();

    //Now you can use both references
    genome.agility.name = "Agility"; 
    genome.agility.complexity = 100;

    genome.intelligence.name = "Intelligence";
    genome.intelligence.complexity = 1000;

    genome.strength.name = "Strength";
    genome.strength.complexity = 100;


}

现在，如果您的 Genome 和 Quantity class 都派生自 MonoBehaviour。你永远不应该使用 new 关键字来初始化它们。

例如：

class Gene :MonoBehaviour{

}

你不为此使用 new 关键字，你使用脚本附加到的 addComponent 或 Instantiate GameObject。如果 class 派生自 MonoBehaviour，那么你不应该在 class 中有构造函数。

void Start()
{
  genome = gameObject.AddComponent<Gene>();
}

我如何从 Unity3D 单一行为中引用由 class 组成的 class？

How do I reference a class made up of classes from a Unity3D monobehaviour?

c#

class

subclass

nullreferenceexception

unity3d