简书链接:unity滚轮控制摄像机距离
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if (Input.GetAxis("Mouse ScrollWheel") != 0)

         {
             CinemachineVirtualCamera virtualCamera = cam as CinemachineVirtualCamera;
             CinemachineComponentBase body = virtualCamera.GetCinemachineComponent(CinemachineCore.Stage.Body);
             if (body is not CinemachineFramingTransposer)
             {
                 return;
             }
             CinemachineFramingTransposer transposer = (body as CinemachineFramingTransposer);
             float cameraDistance = transposer.m_CameraDistance;
             if (GameUtil.IsPointerOverUI(Input.mousePosition))
             {
                 return;
             }
             float delta_z = -Input.GetAxis("Mouse ScrollWheel") * ZoomSpeed;
       /*      if (distance == 0 ||Mathf.Abs(distance-transposer.m_CameraDistance)>10) //后面的逻辑主要是 内外摄像机切换的时候他们两个必定是初始值不一样的，所以当检测到明显的差距那么初始值就重新赋值一下
             {
                 distance = transposer.m_CameraDistance;
             }*/
             //distance += delta_z;
             transposer.m_CameraDistance += delta_z;

         }

if (Input.GetAxis("Mouse ScrollWheel") != 0)

         {
             CinemachineVirtualCamera virtualCamera = cam as CinemachineVirtualCamera;
             CinemachineComponentBase body = virtualCamera.GetCinemachineComponent(CinemachineCore.Stage.Body);
             if (body is not CinemachineFramingTransposer)
             {
                 return;
             }
             CinemachineFramingTransposer transposer = (body as CinemachineFramingTransposer);
             float cameraDistance = transposer.m_CameraDistance;
             if (GameUtil.IsPointerOverUI(Input.mousePosition))
             {
                 return;
             }
             float delta_z = -Input.GetAxis("Mouse ScrollWheel") * ZoomSpeed;
       /*      if (distance == 0 ||Mathf.Abs(distance-transposer.m_CameraDistance)>10) //后面的逻辑主要是 内外摄像机切换的时候他们两个必定是初始值不一样的，所以当检测到明显的差距那么初始值就重新赋值一下
             {
                 distance = transposer.m_CameraDistance;
             }*/
             //distance += delta_z;
             transposer.m_CameraDistance += delta_z;

         }   if (Input.GetAxis("Mouse ScrollWheel") != 0)

         {
             CinemachineVirtualCamera virtualCamera = cam as CinemachineVirtualCamera;
             CinemachineComponentBase body = virtualCamera.GetCinemachineComponent(CinemachineCore.Stage.Body);
             if (body is not CinemachineFramingTransposer)
             {
                 return;
             }
             CinemachineFramingTransposer transposer = (body as CinemachineFramingTransposer);
             float cameraDistance = transposer.m_CameraDistance;
             if (GameUtil.IsPointerOverUI(Input.mousePosition))
             {
                 return;
             }
             float delta_z = -Input.GetAxis("Mouse ScrollWheel") * ZoomSpeed;
       /*      if (distance == 0 ||Mathf.Abs(distance-transposer.m_CameraDistance)>10) //后面的逻辑主要是 内外摄像机切换的时候他们两个必定是初始值不一样的，所以当检测到明显的差距那么初始值就重新赋值一下
             {
                 distance = transposer.m_CameraDistance;
             }*/
             //distance += delta_z;
             transposer.m_CameraDistance += delta_z;

         }



如果是非虚拟相机则修改position.z轴就行