Cant't recognize touch on iOS, but on Android and Mac it's ok

You might want to show us some of your touch-handling code so we can figure out what is wrong

hi razacx, for me its clear that there is not problem in touching event, because i havent change it and before yesterday everything worked ok.

can be there some problem with my settings of unity player setting or xcode?

Input.GetTouch() is known to work. Typically you use the touch position, and fire a ray into the scene to work out what it hits. Hard to see how that can't work. Where I have seen people have problems is where they use Unity's mouse handling code and scale GUIs.

I'm using this code for recognizing the touch of objects

                 foreach (Touch touch in Input.touches) {
                     if (touch.phase == TouchPhase.Began) {
                         RaycastHit hitInfo = GetObject (touch.position);
                         if (hitInfo.collider != null) {
                             if (hitInfo.collider.tag.Equals ("Instrument")) {
                                 Instrument script = hitInfo.collider.gameObject.GetComponent ();
                                 if (script != null) {
                                     script.Hit ();
                                 }
                             }
                         }
                     }
                 }

Could it be by updating to the newer version of Unity?

Ok guys, i found the cause of the problem, now i'm searching for the solution. The touch problem is caused by rotating the screen orientation. In the game i'm rotating from the portrait to the landscape left. when i left the portrait, the touches are just ok and everything is going well. do you have any suggestions? :-)