有没有一种方法可以将按钮onClick功能设置为不在Unity中的场景中的预制件上的功能? [英] Is there a way to set a button onClick function to a function on a prefab that is not in a Scene in Unity?

问题描述

我有一个预制实例，可在运行程序时实例化.预制件尚未出现在现场.在此预制件上，有一个脚本，该脚本具有单击按钮时应调用的功能.按钮在场景中.在按钮的检查器中，我拖放了预制件，然后选择要执行的功能.但是在跑步时，我得到了一个例外.按钮有没有办法引用不在场景中的预制件上的功能?

I have a prefab that instantiate on running the program. The prefab is not already in the scene. On this prefab there is a script with a function that should be called when a button is clicked.The button is in the scene. In the button's inspector I drag and dropped the prefab and chose the function to execute. But on running, I get an exception. Is there a way for the button to reference a function on a prefab that is not in the scene?

推荐答案

除了将处理程序设为静态之外，您还可以找到按钮的实例:

Apart from making handler static, you can just find the instance of the button:

public class MyScript: MonoBehaviour
{
    void Awake()
    {
        Button myButton = GetReferenceToButton();
        myButton.onClick.AddListener ((UnityEngine.Events.UnityAction) this.OnClick);
    }

    public void OnClick()
    {
        Debug.Log("Clicked!");
    }

    private Button GetReferenceToButton()
    {
        Button btn = null;
        //Find it here
        return btn;
    }
}

此外，您还需要在添加作为侦听器之前将委托强制转换为UnityEngine.Events.UnityAction.

Also you need to cast the delegate to UnityEngine.Events.UnityAction before adding is as listener.

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