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用两个碰撞体，场景编辑的时候记得第二个trigger collider的触发边界，与第一个要分开。

private void OnTriggerEnter2D(Collider2D collision)
{
    if (collision.gameObject.name == "Player")
    {
        collision.gameObject.transform.SetParent(transform);
    }
}

private void OnTriggerExit2D(Collider2D collision)
{
    if (collision.gameObject.name == "Player")
    {
        collision.gameObject.transform.SetParent(null);
    }
}

public class WaypointFollower : MonoBehaviour
{
    [SerializeField] private GameObject[] waypoints;
    private int currentWaypointIndex = 0;

    [SerializeField] private float speed = 2f;


    // Update is called once per frame
    void Update()
    {
        if (Vector2.Distance(waypoints[currentWaypointIndex].transform.position, transform.position) < .1f)
        {
            currentWaypointIndex++;
            if (currentWaypointIndex >= waypoints.Length)
            {
                currentWaypointIndex = 0;
            }
        }
        transform.position = Vector2.MoveTowards(transform.position, waypoints[currentWaypointIndex].transform.position, Time.deltaTime * speed);
    }
}