How to Use Co-routine For Taking Touch Event in Unity(Mouse Event And Keyboard KeyEvent), Also Explained How to call coroutine from other script

1. Co-routine for Taking Touch Event

Step 1: Add Box-Collider to Your GameObject On which you want take touch event.


Write Following in followpath.CS

Step 2 : Following is Co-Routine for taking touch event.
             ------------------------------------------------------------------------------


// This method accepts gameobject  name parameter, 
// Then in this method we get name of object on which user tap.
// If both equals then we end while loop.In this way we can take touch event and mouse click event.

public IEnumerator WaitForTouch_Player(string player1)
 {

  bool found = false;
  Touch touch;
  Ray screenRay;
  RaycastHit hit;
  string objname;

  while (Input.touchCount == 0 || found == false)
  {

   if (Input.touchCount > 0) {

    touch = Input.GetTouch (0);

    if (touch.phase == TouchPhase.Began) {
     screenRay = Camera.main.ScreenPointToRay (touch.position);

     if (Physics.Raycast (screenRay, out hit)) {

      objname = hit.collider.gameObject.name;

      if (objname.Equals (player1)) {
       found = true;       
       print("object tap");
       yield return null;
          break;
      }
     }
    }
   }
   yield return null;
  }
  yield return null;
 }

Step 3 : How to call Co-Routine.
             ----------------------------------

            StartCoroutine(WaitForTouch_Player("player_blue"));

2. Co-routine for Taking Touch Event from other Script.

Now if you want to use Co-Routine from other script it is explained as below.
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There is two files named followpath.cs and ReyCast.cs

Co-routine will be in ReyCast.cs and we call coroutine from followpath.cs

Both file attached to path gameobject in editor.

--------------------------------------------------------------------
followpath.cs

void Start () {


// First we find gameobject.
// Then we find component of ReyCasr script that will use to call co-routine from ReyCast  script.

GameObject go = GameObject.Find("path");

ReyCast other = (ReyCast) go.GetComponent(typeof(ReyCast));

   // "player_blue" here is gameobject name.
   other.StartCoroutine (other.WaitForTouch_Player ("player_blue"));
}


// This method will be called when objectname on which you tap and argument which you send while calling co-routine same.
public void callback() {
     // call back called from coroutine.
}


-------------------------------------------------------
ReyCast.cs

// First we find gameobject.
// Then we find component of followpath script that will use to call callback method of        followpath    script.
void Start() {
        GameObject go = GameObject.Find("path");
        followpath pre = (followpath)go.GetComponent(typeof(followpath));
}


// This method accepts gameobject  name parameter, 
// Then in this method we get name of object on which user tap.
// If both equals then we end while loop and call method callback of followpath script.

public IEnumerator WaitForTouch_Player(string player1)
{

bool found = false;
Touch touch;
Ray screenRay;
RaycastHit hit;
string objname;

while (Input.touchCount == 0 || found == false)
{

if (Input.touchCount > 0) {

touch = Input.GetTouch (0);

if (touch.phase == TouchPhase.Began) {
screenRay = Camera.main.ScreenPointToRay (touch.position);

if (Physics.Raycast (screenRay, out hit)) {

objname = hit.collider.gameObject.name;

if (objname.Equals (player1)) {
found = true;
    pre .callback ();
yield return null;

break;
}
}
}
}
yield return null;
}
yield return null;
}

}