1.拾蘋果原型各個物體的動作
籃筐：隨玩家的滑鼠左右移動，碰到蘋果則接住蘋果
蘋果：下落，如果蘋果碰到地面則消失，並且使其他蘋果一起消失
蘋果樹：左右隨機移動，每隔一定時間落下一個蘋果
2.五個指令碼
Apple;ApplePicker;AppleTree;Basket;HighScore

Apple

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Apple : MonoBehaviour {
    public static float bottomY = -20f;
    //宣告一個靜態變數，靜態變數可以被類的所有例項共享。
	void Update () {
        if(transform.position.y < bottomY)
        {
            Destroy(this.gameObject);
            //this呼叫該語句的C#類的當前例項
            ApplePicker apScript = Camera.main.GetComponent<ApplePicker>();
            apScript.AppleDestroyed();
        }
		
	}
}
 

AppleTree

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class AppleTree : MonoBehaviour {
    public GameObject applePrefab; //用來初始化蘋果例項的預設

   public float speed = 1f;//蘋果樹移動的速度

    public float leftAndRightEdge = 10f;//蘋果樹的活動區域，到達邊界時則改變方向

    public float chanceToChangeDirection = 0.1f;//蘋果樹改變方向的概率

    public float secondsBetweenAppleDrops = 1f; //蘋果出現的時間間隔

	// Use this for initialization
	void Start () {
        //每秒掉落一個蘋果
        InvokeRepeating("DropApple", 2f, secondsBetweenAppleDrops);
        //InvokeRepeating函式能夠反覆呼叫另一個命名函式
		
	}
    void DropApple()
    {
        GameObject apple = Instantiate(applePrefab) as GameObject;
        apple.transform.position = transform.position;
    }
	
	// Update is called once per frame
	void Update () {
        //基本運動
        Vector3 pos = transform.position;//定義了三維向量pos,使其等於蘋果樹當前位置
        pos.x += speed * Time.deltaTime;
        transform.position = pos;//將修改後的pos賦值給transform.position
        
        //改變方向，讓蘋果樹在達到leftAndRightEdge值時改變方向
        if(pos.x < -leftAndRightEdge)
        {
            speed = Mathf.Abs(speed);

        }else if(pos.x > leftAndRightEdge)
        {
            speed = -Mathf.Abs(speed);
        }
		
	}
    private void FixedUpdate()
    {
        //隨機改變運動方向
        if(Random.value < chanceToChangeDirection)
        {
            speed *= -1;//改變方向
        }
    }
}
 

ApplePicker

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class ApplePicker : MonoBehaviour {
    public GameObject basketPrefab;
    public int numBaskets = 3;
    public float basketBottomY = -14f;
    public float basketSpacingY = 2f;
    public List<GameObject> basketList;

	// Use this for initialization
	void Start () {
        basketList = new List<GameObject>();
        for(int i = 0; i < numBaskets; i++)
        {
            GameObject tBasketGo = Instantiate(basketPrefab) as GameObject;
            Vector3 pos = Vector3.zero;
            pos.y = basketBottomY + (basketSpacingY * i);
            tBasketGo.transform.position = pos;
            basketList.Add(tBasketGo);
        }
		
	}
	
	// Update is called once per frame
	void Update () {
		
	}
    public void AppleDestroyed()
    {
        //消除所有下路中的蘋果
        GameObject[] tAppleArray = GameObject.FindGameObjectsWithTag("Apple");
        foreach(GameObject tGO in tAppleArray)
        {
            Destroy(tGO);
        }
        int basketIndex = basketList.Count - 1;//消除一個蘭寬
        GameObject tBasketGO = basketList[basketIndex];
        basketList.RemoveAt(basketIndex);
        Destroy(tBasketGO);
        if(basketList.Count == 0)
        {
            SceneManager.LoadScene("_Scene_0");
        }
    }
}

 

Basket

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class Basket : MonoBehaviour {
    private Text scoreGT;

	// Use this for initialization
	void Start () {
        GameObject scoreGO = GameObject.Find("ScoreCounter");//查詢遊戲物件
        scoreGT = scoreGO.GetComponent<Text>();//獲取元件
        scoreGT.text = "0";//設定初始分數
		
	}
	
	// Update is called once per frame
	void Update () {
        Vector3 mousePos2D = Input.mousePosition;
        //從Input中獲取滑鼠在螢幕中的當前位置

        mousePos2D.z = -Camera.main.transform.position.z;
        //攝像機的z座標決定在三維空間中將滑鼠沿z軸向前移動多遠

        Vector3 mousePos3D = Camera.main.ScreenToWorldPoint(mousePos2D);
        //將該點從二維螢幕空間轉換到三維遊戲世界空間

        //將籃筐的x位置移動到滑鼠處的x位置處
        Vector3 pos = this.transform.position;
        pos.x = mousePos3D.x;
        this.transform.position = pos;
		
	}
    private void OnCollisionEnter(Collision collision)
    {
        //檢查與籃筐碰撞的是什麼物件
        GameObject collidedWith = collision.gameObject;
        //將撞到的遊戲物件賦值給臨時變數collidedWith
        if(collidedWith.tag == "Apple")
            //檢查collidedWith是否帶有Apple標籤，從而確定是否是Apple物件
            //是的話將其銷燬
        {
            Destroy(collidedWith);
        }
        int score = int.Parse(scoreGT.text);//將scoreGT轉換為整數值
        score += 100;
        scoreGT.text = score.ToString();//將分數轉換為字串顯示在螢幕上
        if(score > HighScore.score)
        {
            HighScore.score = score;
        } 
    }
}

HighScore

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class HighScore : MonoBehaviour {
    static public int score = 0;


	// Use this for initialization
	void Start () {
		
	}
    private void Awake()
    {
        if (PlayerPrefs.HasKey("ApplePickerHighScore"))
        {
            score = PlayerPrefs.GetInt("ApplePickerHighScore");
        }
        PlayerPrefs.SetInt("ApplePickerHighScore", score);
    }

    // Update is called once per frame
    void Update () {
        Text gt = this.GetComponent<Text>();
        gt.text = "0";
        gt.text = "High Score: " + score;
		if(score > PlayerPrefs.GetInt("ApplePickerHighScore"))
        {
            PlayerPrefs.SetInt("ApplePickerHighScore", score);
        }
	}
}

所用到的API

Returns the absolute value of f.
(計算並返回指定引數 f 絕對值)

FixedUpdate，是在固定的時間間隔執行，不受遊戲幀率的影響。