Alex教程每一P的教程原代码加上我自己的理解初步理解写的注释，可供学习Alex教程的人参考
此代码仅为较上一P有所改变的代码

【Unity教程】从0编程制作类银河恶魔城游戏_哔哩哔哩_bilibili

Sword_Skill.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class Sword_Skill : Skill
{[Header("Skill Info")][SerializeField] private GameObject swordPrefab;//sword预制体[SerializeField] private Vector2 launchDir;//发射方向[SerializeField] private float swordGravity;//发射体的重力public void CreateSword(){GameObject newSword = Instantiate(swordPrefab,player.transform.position,transform.rotation);Sword_Skill_Controller newSwordScript = newSword.GetComponent<Sword_Skill_Controller>();newSwordScript.SetupSword(launchDir, swordGravity);}
}

Sword_Skill_Controller.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class Sword_Skill_Controller : MonoBehaviour
{private Animator anim;private Rigidbody2D rb;private CircleCollider2D cd;private Player player;private void Awake(){anim = GetComponentInChildren<Animator>();rb = GetComponent<Rigidbody2D>();cd = GetComponent<CircleCollider2D>();}public void SetupSword(Vector2 _dir,float _gravityScale){rb.velocity = _dir;rb.gravityScale = _gravityScale;}
}

SkillManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class SkillManager : MonoBehaviour
{public static SkillManager instance;public Dash_Skill dash { get; private set; }public Clone_Skill clone { get; private set; }public Sword_Skill sword { get; private set; }private void Awake(){if (instance != null){Destroy(instance.gameObject);}elseinstance = this;}private void Start(){dash = GetComponent<Dash_Skill>();clone = GetComponent<Clone_Skill>();sword = GetComponent<Sword_Skill>();}
}

Skill.cs

using System.Collections;
using System.Collections.Generic;
using System.Threading;
using UnityEngine;public class Skill : MonoBehaviour
{[SerializeField] protected float cooldown;protected float cooldownTimer;protected Player player;//拿到playerprotected virtual void Start(){player = PlayerManager.instance.player;//拿到player}protected virtual void Update(){cooldownTimer -= Time.deltaTime;}public virtual bool CanUseSkill(){if (cooldownTimer < 0){UseSkill();cooldownTimer = cooldown;return true;}else{Debug.Log("Skill is on cooldown");return false;}}public virtual void UseSkill(){// do some skill thing}}

PlayerAnimationTrigger.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class playerAnimationTriggers : MonoBehaviour
{private Player player => GetComponentInParent<Player>();//获得夫组件上的实际存在的Player组件private void AnimationTrigger(){player.AnimationTrigger();}private void AttackTrigger(){Collider2D[] colliders = Physics2D.OverlapCircleAll(player.attackCheck.position, player.attackCheckRadius);//创建一个碰撞器组，保存所有圈所碰到的碰撞器//https://docs.unity3d.com/2022.3/Documentation/ScriptReference/Physics2D.OverlapCircleAll.htmlforeach(var hit in colliders)//https://blog.csdn.net/m0_52358030/article/details/121722077{if(hit.GetComponent<Enemy>()!=null){hit.GetComponent<Enemy>().Damage();}}}private void ThrowSword(){SkillManager.instance.sword.CreateSword();}
}