Problem with swipe on touch input for iPad

Can someone help me on this? I'm trying to make a match-3 game for WebGL that can run on iPad too. It seems I need to manually code the touch input so it can run on iPad. I'm trying to convert this mouse input script into touch input script, but I can't seem to get the swipe method working, while on mouse input, dragging works just fine.

/// Mouse Input ///

Code (CSharp):

1. private void MouseInput () {
2.         if (state == GameState.None)
3.         {
4.             //user has clicked or touched
5.             if (Input.GetMouseButtonDown (0)) {
6.                 //get the hit position
7.                 var hit = Physics2D.Raycast (Camera.main.ScreenToWorldPoint (Input.mousePosition), Vector2.zero);
8.                 if (hit.collider != null) { //we have a hit!!!
9.                     hitGo = hit.collider.gameObject;
10.                     state = GameState.SelectionStarted;
11.                 }
12.             }
13.         }
14.         else if (state == GameState.SelectionStarted)
15.         {
16.             //user dragged
17.             if (Input.GetMouseButton (0)) {
18.                 var hit = Physics2D.Raycast (Camera.main.ScreenToWorldPoint (Input.mousePosition), Vector2.zero);
19.                 //we have a hit
20.                 if (hit.collider != null && hitGo != hit.collider.gameObject) {
21.                     //user did a hit, no need to show him hints
22.                     StopCheckForPotentialMatches ();
23.                     //if the two shapes are diagonally aligned (different row and column), just return
24.                     if (!Utilities.AreVerticalOrHorizontalNeighbors (hitGo.GetComponent<Shape> (),
25.                         hit.collider.gameObject.GetComponent<Shape> ())) {
26.                         state = GameState.None;
27.                     } else {
28.                         state = GameState.Animating;
29.                         FixSortingLayer (hitGo, hit.collider.gameObject);
30.                         StartCoroutine (FindMatchesAndCollapse (hit));
31.                     }
32.                 }
33.             }
34.         }
35.     }

/// Touch Input ///

Code (CSharp):

1. private void TouchInput () {
2.         if (state == GameState.None)
3.         {
4.             //user has clicked or touched
5.             if (Input.GetTouch(0).phase == TouchPhase.Began) {
6.                 touchPosWorld = Camera.main.ScreenToWorldPoint (Input.GetTouch (0).position);
7.                 Vector2 touchPosWorld2D = new Vector2 (touchPosWorld.x, touchPosWorld.y);
8.                 //get the hit position
9.                 RaycastHit2D hit = Physics2D.Raycast (touchPosWorld2D, Camera.main.transform.forward);
10.                 if (hit.collider != null) { //we have a hit!!!
11.                     hitGo = hit.collider.gameObject;
12.                     state = GameState.SelectionStarted;
13.                 }
14.             }
15.         }
16.         else if (state == GameState.SelectionStarted)
17.         {
18.             //user dragged
19.             if (Input.GetTouch(0).phase == TouchPhase.Began) {
20.                 touchPosWorld = Camera.main.ScreenToWorldPoint (Input.GetTouch (0).position);
21.                 Vector2 touchPosWorld2D = new Vector2 (touchPosWorld.x, touchPosWorld.y);
22.                 RaycastHit2D hit = Physics2D.Raycast (touchPosWorld2D, Camera.main.transform.forward);
23.                 //we have a hit
24.                 if (hit.collider != null && hitGo != hit.collider.gameObject) {
25.                     //user did a hit, no need to show him hints
26.                     StopCheckForPotentialMatches ();
27.                     //if the two shapes are diagonally aligned (different row and column), just return
28.                     if (!Utilities.AreVerticalOrHorizontalNeighbors (hitGo.GetComponent<Shape> (),
29.                         hit.collider.gameObject.GetComponent<Shape> ())) {
30.                         state = GameState.None;
31.                     } else {
32.                         state = GameState.Animating;
33.                         FixSortingLayer (hitGo, hit.collider.gameObject);
34.                         StartCoroutine (FindMatchesAndCollapse (hit));
35.                     }
36.                 }
37.             }
38.         }
39.     }

 

If you're only using one finger you don't need to use Input.GetTouch etc... - you can just keep using the mouse code and it should work on mobile devices. Also, if you decide to use Input.GetTouch( 0 ) you need to check it's valid first by making sure Input.touchCount is greater than zero.

 

problem is, it doesn't work if I only use the mouse code on iPad, since its not an iOS app, but a WebGL game that must be able to be accessed via iPad too.

and sorry I didn't post the Update method, but the touchCount check is already there too