1.新建青蛙节点

拖动青蛙sprite到场景，命名为FrogSprite

在FrogSprite下新建空子节点，命名为EnemyFrog，使其坐标位置和FrogSprite一致

再将EnemyFrog拖到和FrogSprite一个层级

最后将FrogSprite拖到EnemyFrog的子节点下

注：青蛙上下跳动，使其坐标位置不固定，EnemyFrog用于记录青蛙的坐标

2.制作青蛙动画

在Animations下新建Enemies文件夹，用于存放敌人的动画

点击EnemyFrog，新建动画Frog_Idle，存放在Enemies文件夹下

点击录制按钮，再点击切换到FrogSprite上，切换帧，拖动图片到SpriteRender中的Sprite下，使其更换图片显示

制作完成后，停止record，点击播放测试效果

3.添加基本组件

EnemyFrog添加Rigidbody 2D组件

FrogSprite添加Box Collider 2D组件，调整碰撞区域

新建脚本EnemyController，绑定到EnemyFrog

public float moveSpeed; //移动速度public Transform leftPoint; //移动范围左边点public Transform rightPoint; //移动范围右边点private bool movingRight; //是否向右移动private Rigidbody2D theRB; //Enemy刚体public SpriteRenderer theSR; //Enemy SR

在EnemyFrog下添加两个空节点LeftPoint和RightPoint，分别标识移动范围的左右临界点，设置位置，并指向两个Transform

在Start中初始化

void Start(){  theRB = GetComponent<Rigidbody2D>();  //设置左右点父节点为空，使其为固定点，不随父节点移动而变化  leftPoint.parent = null;  rightPoint.parent = null;  movingRight = true;}

Update中实现移动

void Update(){  if(movingRight)  {    //设置速度为moveSpeed    theRB.velocity = new Vector2(moveSpeed, theRB.velocity.y);    theSR.flipX = true;    if(transform.position.x > rightPoint.position.x)    {    	movingRight = false;    }	}   else   {      theRB.velocity = new Vector2(-moveSpeed, theRB.velocity.y);      theSR.flipX = false;      if (transform.position.x < leftPoint.position.x)      {      	movingRight = true;      }  }}

添加参数

//暂停public float moveTime;public float waitTime;private float moveCount;private float waitCount;

Start中初始化

moveCount = moveTime;

Update中加入判断，并设置移动和等待时间随机

void Update(){  if (moveCount > 0)  {  	moveCount -= Time.deltaTime;    if (movingRight)    {      //设置速度为moveSpeed      theRB.velocity = new Vector2(moveSpeed, theRB.velocity.y);      theSR.flipX = true;      if (transform.position.x > rightPoint.position.x)      {        movingRight = false;      }    }    else    {      theRB.velocity = new Vector2(-moveSpeed, theRB.velocity.y);      theSR.flipX = false;      if (transform.position.x < leftPoint.position.x)      {        movingRight = true;      }    }    if (moveCount <= 0)    {      //waitCount = waitTime;      waitCount = Random.Range(waitTime * 0.75f, waitTime * 1.25f);    }  }  else if(waitCount > 0)  {    waitCount -= Time.deltaTime;    theRB.velocity = new Vector2(0, theRB.velocity.y);    if (waitCount <= 0)    {      //moveCount = moveTime;      moveCount = Random.Range(moveTime * 0.75f, moveTime * 1.25f);    }  }}

在EnemyFrog上，新建动画Frog_Jump，保存在Animations/Enemies文件夹下

点击record，切换到FrogSprite上，在相应帧上切换图片

在相应帧调整Y坐标，使其看起来上下跳跃

6.动画衔接

切换到Animator，添加bool型参数isMoving

添加衔接Frog_Idle---->Frog_Jump

添加衔接Frog_Jump---->Frog_Idle

新建动画主体参数，在Start中初始化获取

private Animator anim; //动画主体anim = GetComponent<Animator>();

在Update中判断moveCount后面和else后面分别设置动画

//设置移动动画trueanim.SetBool("isMoving", true);//设置移动动画falseanim.SetBool("isMoving", false);

调节时间点

设置Curves，平缓动画

8.消灭敌人

在player下添加空节点，命名为Stompbox

添加碰撞检测，设置为Trigger，并调整碰撞体大小和位置

新加Tag，命名为Enemy

设置FrogSprite的Tag为Enemy

新建脚本组件Stompbox，绑定至Stompbox节点

添加碰撞检测函数

private void OnTriggerEnter2D(Collider2D other){  if (other.CompareTag("Enemy"))  {    //Debug.Log("Hit Enemy");    other.transform.parent.gameObject.SetActive(false);  }}

添加参数deathEffect，并添加死亡特效指向

public GameObject deathEffect;

碰撞检测中加入死亡特效显示

Instantiate(deathEffect, other.transform.position, other.transform.rotation);

在PlayerController中添加弹力参数bounceForce，添加函数Bounce()给角色加弹力

public float bounceForce; //消灭敌人后弹力//给角色加消灭敌人后的弹力public void Bounce(){	theRB.velocity = new Vector2(theRB.velocity.x, bounceForce);}

player节点下设置弹力值

在Stompbox中，碰撞检测函数里，加入给角色弹力

private void OnTriggerEnter2D(Collider2D other){  if (other.CompareTag("Enemy"))  {    other.transform.parent.gameObject.SetActive(false);    //死亡特效    Instantiate(deathEffect, other.transform.position, other.transform.rotation);    //消灭敌人后给角色加弹力    PlayerController.sInstance.Bounce();  }}

在Stompbox中添加参数

public GameObject collectible; //掉落宝物[Range(0, 100)]public float chanceToDrop; //掉落的几率

碰撞检测里，敌人死亡后添加

float dropSelect = Random.Range(0, 100f);if (dropSelect <= chanceToDrop){	Instantiate(collectible, other.transform.position, other.transform.rotation);}

在节点Stompbox中，添加宝物，设置掉落几率值

12.敌人攻击角色

在EnemyFrog节点上添加组件Box Collider 2D，并设置

添加脚本组件DamagePlayer，伤害角色

设置Frog_Jump动画，使其与Frog跳跃时一致

调整跳跃时Curves，使其与FrogSprite大致一致

13.该篇章最终代码

Stompbox.cs

using System.Collections;using System.Collections.Generic;using UnityEngine;public class Stompbox : MonoBehaviour{  public GameObject deathEffect; //死亡特效  public GameObject collectible; //掉落宝物  [Range(0, 100)]public float chanceToDrop; //掉落的几率  // Start is called before the first frame update  void Start()  {  }  // Update is called once per frame  void Update()  {  }  private void OnTriggerEnter2D(Collider2D other)  {    if (other.CompareTag("Enemy"))    {      //Debug.Log("Hit Enemy");      other.transform.parent.gameObject.SetActive(false);      //死亡特效      Instantiate(deathEffect, other.transform.position, other.transform.rotation);      //消灭敌人后给角色加弹力      PlayerController.sInstance.Bounce();      float dropSelect = Random.Range(0, 100f);      if (dropSelect <= chanceToDrop)      {        Instantiate(collectible, other.transform.position, other.transform.rotation);      }    }  }}

EnemyController.cs

using System.Collections;using System.Collections.Generic;using UnityEngine;public class EnemyController : MonoBehaviour{  public float moveSpeed; //移动速度  public Transform leftPoint; //移动范围左边点  public Transform rightPoint; //移动范围右边点  private bool movingRight; //是否向右移动  private Rigidbody2D theRB; //Enemy刚体  public SpriteRenderer theSR; //Enemy SR  private Animator anim; //动画主体  //暂停  public float moveTime;  public float waitTime;  private float moveCount;  private float waitCount;  // Start is called before the first frame update  void Start()  {    theRB = GetComponent<Rigidbody2D>();    anim = GetComponent<Animator>();    //设置左右点父节点为空，使其为固定点，不随父节点移动而变化    leftPoint.parent = null;    rightPoint.parent = null;    movingRight = true;    moveCount = moveTime;  }  // Update is called once per frame  void Update()  {    if (moveCount > 0)    {    	moveCount -= Time.deltaTime;    	if (movingRight)    	{        //设置速度为moveSpeed        theRB.velocity = new Vector2(moveSpeed, theRB.velocity.y);        theSR.flipX = true;        if (transform.position.x > rightPoint.position.x)        {        	movingRight = false;        }    	}      else      {        theRB.velocity = new Vector2(-moveSpeed, theRB.velocity.y);        theSR.flipX = false;        if (transform.position.x < leftPoint.position.x)        {        	movingRight = true;        }    	}      if (moveCount <= 0)      {        //waitCount = waitTime;        waitCount = Random.Range(waitTime * 0.75f, waitTime * 1.25f);      }      //设置移动动画true      anim.SetBool("isMoving", true);    }    else if(waitCount > 0)    {      waitCount -= Time.deltaTime;      theRB.velocity = new Vector2(0, theRB.velocity.y);      if (waitCount <= 0)      {        //moveCount = moveTime;        moveCount = Random.Range(moveTime * 0.75f, moveTime * 1.25f);      }      //设置移动动画false      anim.SetBool("isMoving", false);    }  }}