I am trying to enable/ disable a script on a UnityEngine GameObject dynamically based on a string of the class name.

I am looping through a list of strings (the class names) and trying to get the script component on the gameObject using gameObject.GetComponent().

My method:

private void changeWeaponScript(int weaponIndex) {
    if (weaponInventory.ElementAtOrDefault(weaponIndex) != null) {
        for (int i = 0; i < weaponInventory.Count; i  ) {
            if (weaponInventory[i] != weaponInventory[weaponIndex]) {
                if (weaponInventory[i] != null) {
                    Debug.Log("disable "   weaponInventory[i]);
                    (GetComponent(weaponInventory[weaponIndex]) as MonoBehaviour).enabled = false;
                }
            } 
        }

        Debug.Log("enable "   weaponInventory[weaponIndex]);
        (GetComponent(weaponInventory[weaponIndex]) as MonoBehaviour).enabled = true;
    }
}

I have also tried getting the type using Type.GetType:

Type weaponClass = Type.GetType(weaponInventory[i]);
gameObject.GetComponent(weaponClass).enabled = false;

Any suggestions would be appreciated.

CodePudding user response：

You can use Reflection to get all the types of subclasses of a given type, and filter those out by a string matching their partial or full name.

In this example I'll get the types of all MonoBehaviour's matching a given string as an IEnumerable. You can then use Unity's functions, such as FindObjectByType, GetComponent, AddComponent, and Destroy to get, create or destroy these components.

using System;
using System.Collections.Generic;
using System.Reflection;
using System.Linq;

// ... in some function
string partialClassName = "Sword"; // does not include namespace
string superClassType = typeof(MonoBehaviour); // type of superclass
IEnumerable<Type> types = superClassType
.Assembly.GetTypes().Where(t => t.IsSubclassOf(superClassType) && !t.IsAbstract).Select(t => t.Name == partialClassName));
// types are now a list of subclasses of MonoBehaviour that match "Sword"