没办法访问其他类别的变量来显示文本[Unity]
问题说明
我有类的rack.cs和GameManager.cs.在shelf.cs中，方法displayApple将返回一个字符串.然后，GameManager将访问该字符串并将其显示在文本"字段中.
I have class of shelf.cs and GameManager.cs. In shelf.cs, the method displayApple will return a string. Then the GameManager will access the string and display it in Text field.
shelf.cs
public class shelf: MonoBehaviour
{
//adding all the gameobjects into a list
public List<GameObject> players;
public string textApp ="";
public string displayApple()
{
for (int i = players.Count - 1; i >= 0; i--) {
if (players [i].name == "Apple") {
textApp = textApp players [i].GetComponent<Apple> ().type " " players [i].GetComponent<Apple> ().colour " " players [i].GetComponent<Apple> ().weight;
textApp = textApp "\n";
}
}
long_apple= textApp;
return long_apple;
}
}
然后在GameManager.cs中
then in GameManager.cs
public class GameManager : MonoBehaviour {
Basket bask;
public Text text_apple;
// Use this for initialization
void Start () {
text_apple.text = bask.displayApple; //i want to call the method of displayApple to get the string returned.
}
}
文本字段不会显示字符串，并且有错误.
The text field wont display the string and there are errors.
NullReferenceException: Object reference not set to an instance of an object
GameManager.Start () (at Assets/scripts/GameManager.cs:12)
正确答案
您永远不会在GameManager.cs中初始化晒太阳.
You are never initializing the bask in GameManager.cs.
public class GameManager : MonoBehaviour {
Basket bask;
public Text text_apple;
// Use this for initialization
void Start () {
bask = GameObject.Find("BaskNameInHierarchy").GetComponent<Basket>()
text_apple.text = bask.displayApple; //i want to call the method of displayApple to get the string returned.
}
}
您还可以公开晒太阳public Basket bask;.然后将一个GameObject拖到脚本附加到的GameObject上的检查器中.
You can also make the bask public public Basket bask;. Then drag a GameObject into the inspector on the GameObject that the script is attached to.
如果您要访问displayApple()，则Shelf脚本也应称为Basket.或相反:private shelf bask.
Also the Shelf script should be called Basket if you're trying to reach displayApple(). Or the other way around: private shelf bask.
这篇好文章是转载于：学新通技术网
