如何引用由Unity3D单行为类组成的类？

Question

我创建了一个类来组织一些数据，一个类由其中的几个类组成(子类？)这样我就能做些像..。

classA.classB.value = 1;

然而，我不知道如何引用我的课程。如果有人知道我该怎么做，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。当要初始化的类不从new派生时，可以使用MonoBehaviour关键字进行初始化。您的Genome和Quantity类不是从MonoBehaviour派生的，因此新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类都是从MonoBehaviour派生的。您永远不应该使用新的关键字来初始化它们。

例如：

class Gene :MonoBehaviour{

}

如果不使用新关键字，则使用脚本附加的addComponent或Instantiate GameObject。如果类将从MonoBehaviour派生，则类中永远不应该有构造函数。

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