Why is OnTriggerEnter not working in Unity3D?-CodePudding

I am very new to unity, and this is probably going to seem like a dumb question to all the people who are good at C#, but I don't know why OnTriggerEnter is not working in this program. I have typed it as it said in the tutorial I'm following but it has no effect in the game. Help?

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

public class DetectCollisions : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        void OnTriggerEnter(Collider other)
        {
            Destroy(gameObject);
            Destroy(other.gameObject);
        }
    }
}

I haven't tried anything yet, I don't know what to try.

CodePudding user response：

Ok as you seem to have difficulty to understand what is happening here again.

void Update()
{
    // I am a local function within the Update method!
    void OnTriggerEnter(Collider other)
    {
        Destroy(gameObject);
        Destroy(other.gameObject);
    }
}

you have the OnTriggerEnter nested undert the Update method as a local function. This way Unity doesn't "know"/find it when trying to invoke it via its messaging system.

You rather want to have it as a normal method on class level

void Update()
{

}

void OnTriggerEnter(Collider other)
{
    Destroy(gameObject);
    Destroy(other.gameObject);
}

and now since Update and Start are empty it is actually best to remove them all along ;)