touch input certain screen part

1.Create a Quad with a collider that fit to the touchable area as it facing the MainCamera. And turn off the Mesh Renderer.

1. Use the following logic to implement the swiping gesture.

   bool isTouchableArea = false;

         void Update() 
            {
                if (Input.touchCount > 0)
                {
                    if(Input.GetTouch(0).phase == TouchPhase.Began)
                    {
                        Ray ray =  Camera.main.ScreenPointToRay(Input.GetTouch(0).position);
                        //Debug.Log(ray.origin);
                        
                        RaycastHit hit;
                        
                        if(Physics.Raycast(ray,out hit))
                        {
                            //Debug.Log("Ray Catsed");
                            if(hit.collider!=null && hit.collider.name=="Quad")
                            {
                                //Debug.Log(hit.collider.name);
                                isTouchableArea = true;
                                
                            }
                            
                        }
                        else
                        {
                            isTouchableArea = false;
                        }
                        
                    }
                    
                    
                    if(isTouchableArea && Input.GetTouch(0).phase == TouchPhase.Moved)
                    {
                        Vector2 touchDeltaPosition = Input.GetTouch(0).deltaPosition;
                        Debug.Log(touchDeltaPosition);
    
                        rigidbody.velocity = touchDeltaPosition;
                    }
                    
                    
                }
                
                                              
            }