Unity通过组件名称字符串添加脚本

一、说明(AddComponent(string)已被官方弃用

1. 通过Type.GetType(string typeName)来得到字符串对应的Type。

public Component AddComponent(Type componentType)

2. Type.GetType(typeName)能获取到自定义类的类型,但是获取Unity的组件不行。

例如Type.GetType(“Rigidbody”)值为null,其实是少了程序集。

所以如下正确:

Type type = Type.GetType("UnityEngine.Rigidbody, UnityEngine.PhysicsModule")

3. 获取Unity的组件程序集全名,再通过Type.GetType()得到的就不为null了。

string qualifiedName = typeof(Rigidbody).AssemblyQualifiedName;
type = Type.GetType(qualifiedName);

二:C#代码

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

public class NewBehaviourScript : MonoBehaviour
{
    string coms = "BoxCollider";

    void OnValidate()
    {
        transform.AddComponentToString(coms);
    }
}

public static class ExtensionMethod
{
    public static Component AddComponentToString(this Transform transform,string ComponentName)
    {
        string qualifiedName;
        Dictionary ComponentQualifiedName = new Dictionary();
        //获取Unity的组件的全名
        qualifiedName = typeof(BoxCollider).AssemblyQualifiedName;
        ComponentQualifiedName.Add("BoxCollider", qualifiedName);
        qualifiedName = typeof(Rigidbody).AssemblyQualifiedName;
        ComponentQualifiedName.Add("Rigidbody", qualifiedName);
        //....需要添加Unity的组件自行再加


        Type type = null;
        Component component = transform.GetComponent(ComponentName);
        if (component == null)
        {
            if (ComponentQualifiedName.ContainsKey(ComponentName))
            {
                type = Type.GetType(ComponentQualifiedName[ComponentName]);
                component = transform.gameObject.AddComponent(type);
            }
            else
            {
                type = Type.GetType(ComponentName);
                component = transform.gameObject.AddComponent(type);
            }
        }
        return component;
    }
}

ExtensionMethod是一个扩展类,我将它扩展到Transform中,后续可以直接调用transform.AddComponentToString(string s);

如还有需要添加Unity的组件,还需要自行添加到ComponentQualifiedName中。

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