C# Camera.main.ScreenPointToRay on android

You need to put the type of variable before ray, which is Ray:

Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);

You will need to do the same for the RaycastHit variable wherever you have declared that:

RaycastHit hit;

I don't see the rest of your code, but if this is happening in update it has to be:

void Update()

not:

function Update()

It's not a syntax error, the code compiles fine, and it works on the Windows build... but as i build for android and transfer the AP$$anonymous$$ to my device, it doesn't respond to any input.

I've declared both ray and hit in the class scope:

 using UnityEngine;
 using System.Collections;

 public class cardSelection : $$anonymous$$onoBehaviour {
 private RaycastHit hit;
 private Ray ray;
 private GameObject matchOne;
 private GameObject matchTwo;
     private bool touchEnabled = true; 

     void Update () {
     if (touchEnabled) {
         ray = Camera.main.ScreenPointToRay (Input.mousePosition);
             
         // Touch / $$anonymous$$ousecontrol
         if (Input.Get$$anonymous$$ouseButtonDown (0))
         {
             if (Physics.Raycast (ray, out hit, 100)) 
             {
                 if (! matchOne)
                     
                     {
                     
                         RevealCardOne();
                     }
                 else if (matchOne && !matchTwo)
                 {
                     
                     StartCoroutine (RevealCardTwo());
                     
                     if (cardsLeft == 0) 
                     {
                         
                          GameWon();
                     }
                 }
             }
         }

}

What i have also tried (which doesn't work either):

         if (Input.touches[0].phase == TouchPhase.Began || Input.touches[0].phase == TouchPhase.Stationary || Input.touches[0].phase == TouchPhase.$$anonymous$$oved) {
             
             ray = Camera.main.ScreenPointToRay(Input.touches[0].position);
             if (Physics.Raycast (ray, out hit, 100)) 
             {
                 if (! matchOne)
                     
                     {
                     
                         RevealCardOne();
                     }
                 else if (matchOne && !matchTwo)
                 {
                     
                     StartCoroutine (RevealCardTwo());
                     
                     if (cardsLeft == 0) 
                     {
                         
                          GameWon();
                     }
                 }
             }
             
         }