Some things wrong with swipe move!

float minSwipeDistY; float minSwipeDistX; Vector2 startPos;

     if (Input.touchCount > 0){
         Touch touch = Input.touches [0];

         switch (touch.phase) {

         case TouchPhase.Began;
             startPos = touch.position;
             break;

         case TouchPhase.Ended;
             float swipeDistVertical =  (new Vector3(0, touch.position.y, 0) - new Vector3(0, startPos.y, 0)).magnitude;
             if (swipeDistVertical > minSwipeDistY)
             {

                 float swipeValue = Mathf.Sign(touch.position.y - startPos.y);

                 if (swipeValue > 0 ){ //up
                     //UP
                     endPos = new Vector3 (transform.position.x, transform.position.y, transform.position.z + 1);
                 }else if(swipeValue < 0){ //down
                     //DOWN
                     endPos = new Vector3 (transform.position.x, transform.position.y, transform.position.z - 1);
                 }
             }

             float swipeDistHorizontal = (new Vector3(touch.position.x, 0, 0) - new Vector3(startPos.x, 0, 0)).magnitude;
             if (swipeDistHorizontal > minSwipeDistX)
             {
                 
                 float swipeValue = Mathf.Sign(touch.position.x - startPos.x);

                 if( swipeValue > 0){//right
                     //MoveRight    
                     endPos = new Vector3 (transform.position.x + 1, transform.position.y, transform.position.z);
                 }else if(swipeValue < 0){//left
                     //Moveleft
                     endPos = new Vector3 (transform.position.x - 1, transform.position.y, transform.position.z);
                 }
             }
             break;

         }
     }

Thank you! Could you please teach me how make swipe on touch screen?