Countdown Timer NullReferenceException

Asked Dec 27 '17 at 08:23

Active Dec 27 '17 at 08:23

Viewed 24 times

I'm trying to make a timer in Unity but always got error "NullReferenceException: Object reference not set to an instance of an object"

here is my code

using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class Timer : MonoBehaviour{

public int timeLeft = 5;
public Text countdownText;

// Use this for initialization
void Start()
{
    StartCoroutine("LoseTime");
}

// Update is called once per frame
void Update()
{
    countdownText.text = ("Time Left = " + timeLeft);

    if (timeLeft <= 0)
    {
        StopCoroutine("LoseTime");
        countdownText.text = "Times Up!";
    }
}

IEnumerator LoseTime()
{
    while (true)
    {
        yield return new WaitForSeconds(1);
        timeLeft--;
    }
}
}

please Help

asked Dec 27 '17 at 08:23

Ace Shafiq

My error is at countdownText.text = ("Time Left = " + timeLeft); – Ace Shafiq Dec 27 '17 at 08:24
3

You are not initializing `countdownText` in your code. Also, Avoid using public fields. Use public properties instead. – Zohar Peled Dec 27 '17 at 08:27
You should initialize `public int timeLeft = 5;` locally inside `Update()` function – Souvik Ghosh Dec 27 '17 at 08:31
`countdownText = new Text()`.... – Zohar Peled Dec 27 '17 at 08:34
already tried, still cannot resolve – Ace Shafiq Dec 27 '17 at 08:43
When I Compile it it does not show error, but when I run It will show the error – Ace Shafiq Dec 27 '17 at 08:44
you need to assign it onw of your exisiting text component in Awake or Start method. something like `countdownText = gameObject.GetComponent();` . With correct type, or give it a tag and search by tag. – Pac0 Dec 27 '17 at 08:45

Countdown Timer NullReferenceException

0 Answers0