//射线检测public void chekGround(){//射线检测地面//1<<8使得射线只检测索引为8的Ground层，防止检测到其他层RaycastHit2D hit = Physics2D.Raycast(transform.position, Vector2.down, 1, 1 << 8);//1<<8表示开启索引为8的层Debug.DrawLine(transform.position, transform.position + Vector3.down * 0.5f, Color.red);//绘制射线if (hit.collider != null){if (hit.collider.gameObject.name == "Ground"){//如果射线检测到的是地面isGround = true;}else{isGround = false;}}else{isGround = false;}}

2.碰撞体检测

public void checkGroundAndType(){//碰撞体检测地面if (collider.IsTouchingLayers(1 << 8) ){isGround = true;}else{isGround = false;}}