Touch input basics in Unity - Mini Project: Build & Apply

Touch Input Basics

📖 Scenario: You are creating a simple Unity app that reacts when the user touches the screen. This is common in mobile games and apps where touch controls are used.

🎯 Goal: Build a Unity script that detects when the user touches the screen and prints the touch position to the console.

📋 What You'll Learn

Create a list to store current touches

Create a variable to count the number of touches

Use a loop to check each touch's position

Print the touch positions to the console

💡 Why This Matters

🌍 Real World

Touch input is essential for mobile apps and games to respond to user finger taps and gestures.

💼 Career

Understanding touch input is key for mobile game developers and app creators working with Unity.

1

Create a list to hold current touches

Create a variable called touches and set it to Input.touches to get the current touches on the screen.

Unity

using UnityEngine;

public class TouchInput : MonoBehaviour
{
    void Update()
    {
        // Your code here
    }
}

Need a hint?

Use Input.touches to get all current touches as an array.

2

Create a variable to count the number of touches

Create an integer variable called touchCount and set it to Input.touchCount to get how many touches are currently on the screen.

Unity

using UnityEngine;

public class TouchInput : MonoBehaviour
{
    void Update()
    {
        Touch[] touches = Input.touches;
        // Create touchCount variable here
    }
}

Need a hint?

Input.touchCount gives the number of touches currently detected.

3

Loop through each touch and get its position

Use a for loop with variable i from 0 to touchCount (exclusive) to access each touch in touches. Inside the loop, create a variable touchPos and set it to touches[i].position.

Unity

using UnityEngine;

public class TouchInput : MonoBehaviour
{
    void Update()
    {
        Touch[] touches = Input.touches;
        int touchCount = Input.touchCount;
        // Loop through touches and get position
    }
}

Need a hint?

Use a for loop to go through each touch and get its position.

4

Print each touch position to the console

Inside the for loop, add a line to print the text "Touch position: " followed by the touchPos variable using Debug.Log.

Unity

using UnityEngine;

public class TouchInput : MonoBehaviour
{
    void Update()
    {
        Touch[] touches = Input.touches;
        int touchCount = Input.touchCount;
        for (int i = 0; i < touchCount; i++)
        {
            Vector2 touchPos = touches[i].position;
            // Print touchPos here
        }
    }
}

Need a hint?

Use Debug.Log("Touch position: " + touchPos); to print the position.