在 Unity C# 中在运行时从另一个脚本访问脚本 [英] Accessing a script from another script at runtime in Unity C#

问题描述

就像在

这是有效的

public Sc​​ript一个脚本；无效更新(){如果 (script.varX <0) {//...}}

但现在我收到未将对象引用设置为对象的实例"错误，我认为这是由于尝试访问 ScriptA 的脚本附加到实例化预制.

如何在运行时附加脚本和/或游戏对象?

解决方案

看来你需要先找到你的脚本类型，如果它已经存在于场景中:

public Sc​​ript一个脚本；无效开始(){script = GameObject.FindObjectOfType();}无效更新(){如果(脚本.变量...)}

Like in here, but the difference is that it's supposed to be done from an instantiated prefab, so I can not drag the GameObject, that has the script with the variable I want to access, into this script.

This was working

public ScriptA script;

void Update() {
   if (script.varX < 0) {
      // . . .
   }
}

But now I'm getting "Object reference not set to an instance of an object" error, which I think comes from the fact that the script trying to access ScriptA, is attached to an instantiated prefab.

How do I attach scripts and/or GameObjects at runtime?

解决方案

Looks like you need to find your script type first, if it already exists in the scene:

public ScriptA script;

void Start()
{
    script = GameObject.FindObjectOfType<ScriptA>();
}

void Update()
{
    if(script.variable...)
}

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