c# Destroy upon collision isn't working

Questions & Answers
1

I have runner who is supposed to destroy another game object “food” which is placed in my prefabs folder. Unfortunately, the code isn’t working as expected. I would like to know what went wrong and how do I make the runner destroy “food” once the two collides?

I am attaching the screenshot of runner:

This is the c# code of runner:

using UnityEngine;
using System.Collections;

public class runner : MonoBehaviour {


	// The force which is added when the player jumps
	// This can be changed in the Inspector window
public Vector2 jumpForce = new Vector2(0, 1);



	// Use this for initialization
	void Start () {
			 

		
		// destroy food upon collision
		
		Destroy (GameObject.FindWithTag("food"),3);// 20sec


	}

	// Update is called once per frame
	void Update () {


	
		// Jump
		if (Input.GetKeyUp("space"))
		{
			rigidbody2D.velocity = Vector2.zero;
			rigidbody2D.AddForce(jumpForce);
		}
		// Die by being off screen
		Vector2 screenPosition = Camera.main.WorldToScreenPoint(transform.position);
		if (screenPosition.y > Screen.height || screenPosition.y < 0)
		{
			Die();
		}
	}

	// Die by collision
	void OnCollisionEnter2D(Collision2D other)
	{
		Die();
	}
	
	void Die()
	{
		Application.LoadLevel(Application.loadedLevel);
	}
}

Moreover, this is the screenshot of “food”.

This is the c# code of “food”.

using UnityEngine;
using System.Collections;

public class foodpow : MonoBehaviour {

	public Vector2 velocity = new Vector2(-4, 0);
	
	// Use this for initialization
	void Start()
	{
		rigidbody2D.velocity = velocity;
	}
}
2

Your code does a completely different thing. Placing

Destroy (GameObject.FindWithTag("food"),3);// 20sec

in your start function will destroy the first food object found 3 seconds after the start of the scene.

You should check for that in your OncollisionEnter2D function instead:

// Die by collision
void OnCollisionEnter2D(Collision2D other) {
		if (other.gameObject.CompareTag("food")) {
			Destroy (other.gameObject);
		} else {
			Die();
		}
	}
3

@Andres Fernandez :

Thanks for responding to my question! Just a follow up questions though, when I debug the code, an error message appears at the last “}” in the code you posted saying " expected".

May I ask why I’m getting this error? I just copied the code you posted. should I retain this code or remove it instead?

void Die()
{
Application.LoadLevel(Application.loadedLevel);
}
}