Unity3D 2D游戏开发 官方教程。(十五)

十五移动端

给游戏添加移动端控制代码。首先修改游戏的编译目标平台从PC换成移动端。然后在Player脚本中增加对触屏的控制代码。

15.1修改配置
点击File/Building Settings…

系统弹出Build Sertting窗口，默认为PC平台（PC,Max & Linux Standalone）如图：

确认Main场景在Scenes In Build窗口中。如果没有点击“Add Scene”添加。

修改PlatForm为IOS如图：

点击”Switch Platform”确认，然后关闭窗口即可。
15.2修改脚本
修改Player脚本代码如下：

using UnityEngine;using System.Collections;using UnityEngine.UI;public class Player : MovingObject {    public int wallDamage = 1;    public int pointsPerFood = 10;    public int pointsPerSoda = 20;    public float restartLevelDelay = 1f;    public Text foodText;    public AudioClip moveSound1;    public AudioClip moveSound2;    public AudioClip eatSound1;    public AudioClip eatSound2;    public AudioClip drinkSound1;    public AudioClip drinkSound2;    public AudioClip gameOverSound;    private Animator animator;    private int food ;    private Vector2 touchOrigin = -Vector2.one;    // Use this for initialization    protected override void Start ()     {        animator = GetComponent<Animator>();        food = GameManager.instance.playerFoodPoints;        foodText.text = "Food: "+food;        base.Start();    }    // Update is called once per frame    void Update ()     {        if(!GameManager.instance.playersTurn)            return ;        int horizontal = 0;        int vertical = 0 ;    //判断平台执行对应代码    #if UNITY_EDITOR || UNITY_STANDALONE || UNITY_WEBPLAYER        horizontal = (int)Input.GetAxisRaw("Horizontal");        vertical = (int)Input.GetAxisRaw("Vertical");        if(horizontal!=0)            vertical = 0;    #else        //初始无记录信息        if(Input.touchCount>0)        {            Touch myTouch = Input.touches[0];            if(myTouch.phase == TouchPhase.begin)            {                //记录第一个触点                touchOrigin = myTouch.position;            }            else if(myTouch.phase == TouchPhase.Ended && touchOrigin.x>=0)            {                //触屏接触，记录位置，计算两点距离，大的优先作为控制命令                Vector2 touchEnd = myTouch.position;                float x = touchEnd.x - touchOrigin.x;                float y = touchEnd.y - touchOrigin.y;                touchOrigin.x = -1;                if(Mathf.Abs(x)>Mathf.Abs(y))                    horizontal = x > 0 ? 1 : -1;                else                    vertical = y > 0 ? 1 : -1;            }        }    #endif        if(horizontal!=0 || vertical!=0)            AttemptMove<Wall>(horizontal,vertical);    }    private void OnDisable()    {        GameManager.instance.playerFoodPoints = food;    }    protected override void OnCantMove<T>(T component)    {        Wall hitWall = component as Wall;        hitWall.DamageWall(wallDamage);        animator.SetTrigger("PlayerChop");    }    private void Restart()    {        Application.LoadLevel(Application.loadedLevel);    }    private void OnTriggerEnter2D(Collider2D other)    {        if(other.tag == "Exit")        {            Invoke("Restart",restartLevelDelay);            enabled = false;        }        else if(other.tag == "Food")        {            food += pointsPerFood;            foodText.text = "+" + pointsPerFood + " Food: "+food;            SoundManager.instance.RandomizeSfx(eatSound1,eatSound2);            other.gameObject.SetActive(false);        }        else if(other.tag == "Soda")        {            food += pointsPerSoda;            foodText.text = "+" + pointsPerSoda + "Food: "+food;            SoundManager.instance.RandomizeSfx(drinkSound1,drinkSound2);            other.gameObject.SetActive(false);        }    }    public void LoseFood(int loss)    {        animator.SetTrigger("PlayerHit");        food -= loss;        foodText.text = "-" + loss + "Food: "+food;        CheckIfGameOver();    }    protected override void AttemptMove<T>(int xDir,int yDir)    {        food--;        foodText.text = "Food: "+food;        base.AttemptMove<T>(xDir,yDir);        RaycastHit2D hit;        if(Move (xDir,yDir,out hit))        {            SoundManager.instance.RandomizeSfx(moveSound1,moveSound2);        }        CheckIfGameOver();        GameManager.instance.playersTurn =false;    }    private void CheckIfGameOver()    {        if(food <= 0 )        {            SoundManager.instance.PlaySingle(gameOverSound);            SoundManager.instance.musicSource.Stop();            GameManager.instance.GameOver();        }    }}

到此整个教程示例已经全部结束。在学习过程中总是有这样或者那样的问题，可能是对环境的不熟悉也可能是粗心没有注意教程中细节的设计。特此记录笔记供以后查找使用。