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);
}

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}
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。