Unity——为什么iPhone6和iPhone7对触摸输入的行为不同?

我在update()中有下面的代码,可以拖动相机并检测对象上的单击。当我们在iphone 6和x上尝试时,一切都很好,但是当我们在iphone7上尝试时,拖动屏幕非常没有反应,单击对象只在您非常轻触屏幕时才起作用。有人知道发生了什么事吗?

if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began) {
             fingerMoved = false;

             if (_eventSystem.IsPointerOverGameObject(Input.GetTouch(0).fingerId)) {
                 fingerMoved = true;
             }
             hit_position = Input.GetTouch(0).position;
             camera_position = cam.position;
         } else if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved) {
             current_position = Input.GetTouch(0).position;
             LeftMouseDrag();

             if (Vector2.Distance(hit_position, current_position) > 7f) {
                 fingerMoved = true;
             }

             cam.DOMoveY(target_position.y, 0.75f);
         } else if (!fingerMoved && Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended) {
             foreach (var item in storageList) {
                 if (Vector2.Distance(item.transform.position, Camera.main.ScreenToWorldPoint(hit_position)) < 0.5f) {
                     sideMenu.Open(item.myNo);
                 }
             }
         }
 void LeftMouseDrag() {
     Vector3 direction = Camera.main.ScreenToWorldPoint(current_position) - Camera.main.ScreenToWorldPoint(hit_position);
     direction.x = 0f;
     direction = direction * -1;
     target_position = camera_position + direction;
     if (target_position.y > camMaxY) {
         target_position.y = camMaxY;
     }
     if (target_position.y < camMinY) {
         target_position.y = camMinY;
     }
 }