问题描述
我四处搜索，但我无法让它发挥作用.我想我只是不知道正确的语法，或者只是不太了解上下文.
I've searched around and I just can't get this to work. I think I just don't know the proper syntax, or just doesn't quite grasp the context.
我有一个包含公共整数的 BombDrop 脚本.我把它用于公共静态，但有人说这是一个非常糟糕的编程习惯，我应该学习封装.这是我写的:
I have a BombDrop script that holds a public int. I got this to work with public static, but Someone said that that is a really bad programming habit and that I should learn encapsulation. Here is what I wrote:
BombDrop 脚本:
<!-- language: c# -->
public class BombDrop : MonoBehaviour {
public GameObject BombPrefab;
//Bombs that the player can drop
public int maxBombs = 1;
// Update is called once per frame
void Update () {
if (Input.GetKeyDown(KeyCode.Space)){
if(maxBombs > 0){
DropBomb();
//telling in console current bombs
Debug.Log("maxBombs = " + maxBombs);
}
}
}
void DropBomb(){
// remove one bomb from the current maxBombs
maxBombs -= 1;
// spawn bomb prefab
Vector2 pos = transform.position;
pos.x = Mathf.Round(pos.x);
pos.y = Mathf.Round(pos.y);
Instantiate(BombPrefab, pos, Quaternion.identity);
}
}
所以我希望附加到预制游戏对象 Bombprefab 的 Bomb 脚本访问 BombDrop 中的 maxBombs 整数，这样当炸弹被摧毁时，它会将 BombDrop 中的 maxBombs 加 1.
So I want the Bomb script that's attached to the prefabgameobject Bombprefab to access the maxBombs integer in BombDrop, so that when the bomb is destroyed it adds + one to maxBombs in BombDrop.
这是需要参考的 Bomb 脚本.
And this is the Bomb script that needs the reference.
public class Bomb : MonoBehaviour {
// Time after which the bomb explodes
float time = 3.0f;
// Explosion Prefab
public GameObject explosion;
BoxCollider2D collider;
private BombDrop BombDropScript;
void Awake (){
BombDropScript = GetComponent<BombDrop> ();
}
void Start () {
collider = gameObject.GetComponent<BoxCollider2D> ();
// Call the Explode function after a few seconds
Invoke("Explode", time);
}
void OnTriggerExit2D(Collider2D other){
collider.isTrigger = false;
}
void Explode() {
// Remove Bomb from game
Destroy(gameObject);
// When bomb is destroyed add 1 to the max
// number of bombs you can drop simultaneously .
BombDropScript.maxBombs += 1;
// Spawn Explosion
Instantiate(explosion,
transform.position,
Quaternion.identity);
在文档中它说它应该是这样的
In the documentation it says that it should be something like
BombDropScript = otherGameObject.GetComponent<BombDrop>();
但这行不通.也许我只是不明白这里的语法.是不是应该说otherGameObject?因为那没有任何作用.在我的 BombDropScript.maxBombs 中，我的 BombDropScript.maxBombs 仍然出现错误:未设置对象引用做对象的实例"
But that doesn't work. Maybe I just don't understand the syntax here. Is it suppose to say otherGameObject? Cause that doesn't do anything. I still get the error : "Object reference not set do an instance of an object" on my BombDropScript.maxBombs down in the explode()
推荐答案
您需要找到包含您计划引用的脚本组件的 GameObject.确保游戏对象已经在场景中，否则 Find 将返回 null.
You need to find the GameObject that contains the script Component that you plan to get a reference to. Make sure the GameObject is already in the scene, or Find will return null.
GameObject g = GameObject.Find("GameObject Name");
然后就可以抓取脚本了:
Then you can grab the script:
BombDrop bScript = g.GetComponent<BombDrop>();
然后就可以访问脚本的变量和函数了.
Then you can access the variables and functions of the Script.
bScript.foo();
我刚刚意识到我前几天回答了一个非常相似的问题，请在此处查看:不知道如何获取敌人的生命值
I just realized that I answered a very similar question the other day, check here:Don't know how to get enemy's health
因为我已经回答了你的问题，所以我会稍微扩展一下.
I'll expand a bit on your question since I already answered it.
您的代码正在做的是说在我的游戏对象中查找 BombDropScript，大多数情况下脚本不会附加到同一个游戏对象.
What your code is doing is saying "Look within my GameObject for a BombDropScript, most of the time the script won't be attached to the same GameObject.
也为 maxBombs 使用 setter 和 getter.
Also use a setter and getter for maxBombs.
public class BombDrop : MonoBehaviour
{
public void setMaxBombs(int amount)
{
maxBombs += amount;
}
public int getMaxBombs()
{
return maxBombs;
}
}
这篇关于如何通过GetComponent从另一个游戏对象中的另一个脚本访问变量?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！