Unity拖动Sprite

注意要加collider。

    private void OnMouseDown()
    {
        oriMousePos = Input.mousePosition;
        oriPos = transform.position;
    }

    private void OnMouseDrag()
    {
        var offset = (Camera.main.ScreenToWorldPoint(Input.mousePosition).x - Camera.main.ScreenToWorldPoint(oriMousePos).x);    
        transform.position = new Vector3(oriPos.x + offset, transform.position.y, transform.position.z);
    }