需求是这样的，游戏中常常需要在手机屏幕的左右边界各加一个碰撞体。效果就是角色撞到屏幕边缘被弹回之类的。但是屏幕的比例会变，因此需要写代码，让它们一直处于边界。
碰撞体如下：
代码也很简单：
using UnityEngine; public class SideCollider : MonoBehaviour { [Header("border colliders --- ")] public Transform leftBorderCollider; public Transform rightBorderCollider; [Header("half collider width --- ")] public float halfColliderWidth = 0.5f; // half screen width size private float halfScreenWidth; private void Start() { float halfSreenHeight = Camera.main.orthographicSize; halfScreenWidth = Screen.width / (float)Screen.height * halfSreenHeight; Debug.Log(halfScreenWidth); // leftBorderCollider.position = new Vector3(-halfScreenWidth - halfColliderWidth, leftBorderCollider.position.y, leftBorderCollider.position.z); rightBorderCollider.position = new Vector3(halfScreenWidth + halfColliderWidth, rightBorderCollider.position.y, rightBorderCollider.position.z); } }