WaitForSeconds and WaitForEndOfFrame in Unity - Mini Project: Build & Apply

Using WaitForSeconds and WaitForEndOfFrame in Unity

📖 Scenario: You are making a simple Unity game where you want to show a message, wait for a short time, then show another message after the frame ends. This helps you understand how to pause actions in Unity using WaitForSeconds and WaitForEndOfFrame.

🎯 Goal: Create a Unity script that first prints "Start waiting...", then waits for 2 seconds using WaitForSeconds, then prints "Waited 2 seconds", then waits until the end of the current frame using WaitForEndOfFrame, and finally prints "End of frame reached".

📋 What You'll Learn

Create a coroutine method called WaitExample.

Use WaitForSeconds to wait for 2 seconds.

Use WaitForEndOfFrame to wait until the frame ends.

Print messages exactly as specified at each step.

Start the coroutine in the Start method.

💡 Why This Matters

🌍 Real World

Waiting for seconds or frame ends is common in games to control timing, animations, or effects smoothly.

💼 Career

Understanding coroutines and waiting methods is essential for Unity developers to create responsive and well-timed gameplay experiences.

1

Create the Unity script and print the start message

Create a public class called WaitExampleScript that inherits from MonoBehaviour. Inside it, write a Start method that prints "Start waiting..." to the console.

Unity

using UnityEngine;

public class WaitExampleScript : MonoBehaviour
{
    // Your code here
}

Need a hint?

Remember to use Debug.Log to print messages in Unity.

2

Add the coroutine method and start it

Add a public IEnumerator method called WaitExample inside WaitExampleScript. In the Start method, start this coroutine using StartCoroutine(WaitExample()).

Unity

using UnityEngine;
using System.Collections;

public class WaitExampleScript : MonoBehaviour
{
    void Start()
    {
        Debug.Log("Start waiting...");
        // Your code here
    }

    // Your code here
}

Need a hint?

Use StartCoroutine to run the coroutine method.

3

Use WaitForSeconds to wait 2 seconds and print message

Inside the WaitExample coroutine, replace yield return null; with yield return new WaitForSeconds(2);. After this line, print "Waited 2 seconds" using Debug.Log.

Unity

using UnityEngine;
using System.Collections;

public class WaitExampleScript : MonoBehaviour
{
    void Start()
    {
        Debug.Log("Start waiting...");
        StartCoroutine(WaitExample());
    }

    public IEnumerator WaitExample()
    {
        // Your code here
    }
}

Need a hint?

WaitForSeconds pauses the coroutine for the given seconds.

4

Use WaitForEndOfFrame and print final message

After printing "Waited 2 seconds" in the WaitExample coroutine, add yield return new WaitForEndOfFrame();. Then print "End of frame reached" using Debug.Log. This completes the coroutine.

Unity

using UnityEngine;
using System.Collections;

public class WaitExampleScript : MonoBehaviour
{
    void Start()
    {
        Debug.Log("Start waiting...");
        StartCoroutine(WaitExample());
    }

    public IEnumerator WaitExample()
    {
        yield return new WaitForSeconds(2);
        Debug.Log("Waited 2 seconds");
        // Your code here
    }
}

Need a hint?

WaitForEndOfFrame waits until the current frame finishes rendering.