A simple swipe detector for touchscreens for Unity3D. Four cardinal directions.

SwipeInput.cs

using UnityEngine;

/*
 * Swipe Input script for Unity by @fonserbc, free to use wherever
 *
 * Attack to a gameObject, check the static booleans to check if a swipe has been detected this frame
 * Eg: if (SwipeInput.swipedRight) ...
 *
 * 
 */

public class SwipeInput : MonoBehaviour {

	// If the touch is longer than MAX_SWIPE_TIME, we dont consider it a swipe
	public const float MAX_SWIPE_TIME = 0.5f; 
	
	// Factor of the screen width that we consider a swipe
	// 0.17 works well for portrait mode 16:9 phone
	public const float MIN_SWIPE_DISTANCE = 0.17f;

	public static bool swipedRight = false;
	public static bool swipedLeft = false;
	public static bool swipedUp = false;
	public static bool swipedDown = false;
	
	
	public bool debugWithArrowKeys = true;

	Vector2 startPos;
	float startTime;

	public void Update()
	{
		swipedRight = false;
		swipedLeft = false;
		swipedUp = false;
		swipedDown = false;

		if(Input.touches.Length > 0)
		{
			Touch t = Input.GetTouch(0);
			if(t.phase == TouchPhase.Began)
			{
				startPos = new Vector2(t.position.x/(float)Screen.width, t.position.y/(float)Screen.width);
				startTime = Time.time;
			}
			if(t.phase == TouchPhase.Ended)
			{
				if (Time.time - startTime > MAX_SWIPE_TIME) // press too long
					return;

				Vector2 endPos = new Vector2(t.position.x/(float)Screen.width, t.position.y/(float)Screen.width);

				Vector2 swipe = new Vector2(endPos.x - startPos.x, endPos.y - startPos.y);

				if (swipe.magnitude < MIN_SWIPE_DISTANCE) // Too short swipe
					return;

				if (Mathf.Abs (swipe.x) > Mathf.Abs (swipe.y)) { // Horizontal swipe
					if (swipe.x > 0) {
						swipedRight = true;
					}
					else {
						swipedLeft = true;
					}
				}
				else { // Vertical swipe
					if (swipe.y > 0) {
						swipedUp = true;
					}
					else {
						swipedDown = true;
					}
				}
			}
		}

		if (debugWithArrowKeys) {
			swipedDown = swipedDown || Input.GetKeyDown (KeyCode.DownArrow);
			swipedUp = swipedUp|| Input.GetKeyDown (KeyCode.UpArrow);
			swipedRight = swipedRight || Input.GetKeyDown (KeyCode.RightArrow);
			swipedLeft = swipedLeft || Input.GetKeyDown (KeyCode.LeftArrow);
		}
	}
}

How to make it that it makes an input while it's swiping? so I can make a movement with Time.deltaTime
if (SwipeInput.swipedRight == true) { player.transform.Translate(Vector3.right * Time.deltaTime * playerSpeed); Debug.Log("Swipe Input Right" + playerPosition); }

Works very well cheers for that.
I took the liberty of adding a delegate:

`using UnityEngine;

/*

• Swipe Input script for Unity by @Fonserbc, free to use wherever
• Attack to a gameObject, check the static booleans to check if a swipe has been detected this frame
• Eg: if (SwipeInput.swipedRight) ...

*/

public class SwipeInput : MonoBehaviour {

// If the touch is longer than MAX_SWIPE_TIME, we dont consider it a swipe
public const float MAX_SWIPE_TIME = 0.5f; 

// Factor of the screen width that we consider a swipe
// 0.17 works well for portrait mode 16:9 phone
public const float MIN_SWIPE_DISTANCE = 0.17f;

public static bool swipedRight = false;
public static bool swipedLeft = false;
public static bool swipedUp = false;
public static bool swipedDown = false;
static bool swiped;


public bool debugWithArrowKeys = true;


public delegate void OnSwipe();
public static event OnSwipe swipeListeners;



Vector2 startPos;
float startTime;

public void Update()
{
	swiped = false;
	swipedRight = false;
	swipedLeft = false;
	swipedUp = false;
	swipedDown = false;

	if(Input.touches.Length > 0)
	{
		Touch t = Input.GetTouch(0);
		if(t.phase == TouchPhase.Began)
		{
			startPos = new Vector2(t.position.x/(float)Screen.width, t.position.y/(float)Screen.width);
			startTime = Time.time;
		}
		if(t.phase == TouchPhase.Ended)
		{
			if (Time.time - startTime > MAX_SWIPE_TIME) // press too long
				return;

			Vector2 endPos = new Vector2(t.position.x/(float)Screen.width, t.position.y/(float)Screen.width);

			Vector2 swipe = new Vector2(endPos.x - startPos.x, endPos.y - startPos.y);

			if (swipe.magnitude < MIN_SWIPE_DISTANCE) // Too short swipe
				return;

			if (Mathf.Abs (swipe.x) > Mathf.Abs (swipe.y)) { // Horizontal swipe
				if (swipe.x > 0) {
					swiped = swipedRight = true;
				}
				else {
					swiped = swipedLeft = true;
				}
			}
			else { // Vertical swipe
				if (swipe.y > 0) {
					swiped = swipedUp = true;
				}
				else {
					swiped = swipedDown = true;
				}
			}
		}
	}

	if (debugWithArrowKeys) {
		swipedDown = swipedDown || Input.GetKeyDown (KeyCode.DownArrow);
		swipedUp = swipedUp|| Input.GetKeyDown (KeyCode.UpArrow);
		swipedRight = swipedRight || Input.GetKeyDown (KeyCode.RightArrow);
		swipedLeft = swipedLeft || Input.GetKeyDown (KeyCode.LeftArrow);
		swiped = swipedDown || swipedLeft || swipedRight || swipedUp;
	}

	if (swiped)
    {
		if (swipeListeners != null)
		{
			swipeListeners();
		}

	}
}

}`