void OnTriggerEnter2D(Collider2D collisionObject) not working with drag object to the trigger

Unity Engine
1

Hi
i am creating 2D game to drag letters and put them in the right order or place and make some action when put them in the correct order like sound .Anyway , i am using trigger so when i drag the letter to that trigger, it should give me that sound, but it doesn’t. unless i use Rigidbody 2D property the letter (which i dont want to use Rigidbody).

this is the code i use for the trigger:

using UnityEngine;
using System.Collections;

public class GameTrigger1_1 : MonoBehaviour {
    public AudioClip au;
        public void OnTriggerEnter2D(Collider2D collisionObject){
        if (string.Equals (collisionObject.tag, "D")) {
                    audio.PlayOneShot(au);
                }                  
   
        }
   
}

i already give the letter BoxCollider 2D property, and i dont know its not working and give me any output while i drag the letter to the trigger, looking for your help

thanks

2

I’m not pro, but just giving my 2 cents, did you tick the checkbox for isTrigger for your collider?
Also, to see if it is actually colliding, try using debug.log (“test message”) in your code.