为什么这个添加的UI按钮的事件没有被调用？

Question

在开发城市模式:Skylines时,我遇到了一个问题.

据我所知,我的大多数代码都可以正常工作 - 但到目前为止,我还没有对它进行测试.这是因为当我添加到UI的按钮被点击时,它应该按顺序被调用.此按钮上的单击事件不会调用我已分配给它的处理程序.

这是我创建按钮的地方:

public class LoadingExtension : LoadingExtensionBase
{
    public override void OnLevelLoaded(LoadMode mode)
    {
        Debug.LogDebugMessage("Adding 'Generate City Report' button to UI");

        // Get the UIView object. This seems to be the top-level object for most
        // of the UI.
        var uiView = UIView.GetAView();

        // Add a new button to the view.
        var button = (UIButton)uiView.AddUIComponent(typeof(UIButton));

        // Set the text to show on the button.
        button.text = "Generate City Report";

        // Set the button dimensions.
        button.width = 250;
        button.height = 30;

        // Style the button to look like a menu button.
        button.normalBgSprite = "ButtonMenu";
        button.disabledBgSprite = "ButtonMenuDisabled";
        button.hoveredBgSprite = "ButtonMenuHovered";
        button.focusedBgSprite = "ButtonMenuFocused";
        button.pressedBgSprite = "ButtonMenuPressed";
        button.textColor = new Color32(255, 255, 255, 255);
        button.disabledTextColor = new Color32(7, 7, 7, 255);
        button.hoveredTextColor = new Color32(7, 132, 255, 255);
        button.focusedTextColor = new Color32(255, 255, 255, 255);
        button.pressedTextColor = new Color32(30, 30, 44, 255);

        // Enable button sounds.
        button.playAudioEvents = true;

        // Place the button.
        button.transformPosition = new Vector3(-1.0f, 0.97f);

        // Respond to button click.
        // NOT GETTING CALLED
        button.eventClick += ButtonClick;
    }

    public void ButtonClick(UIComponent component, UIMouseEventParameter eventParam)
    {
        Debug.LogWarningMessage("HIGH LOGIC: Beginning report generation.");
        string now = DateTime.Now.ToFileTime().ToString();
        string filepath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
        string filename = filepath + "\\CityReport-" + now + ".xlsx";
        Output fileCreator = new Output(filename);
        fileCreator.GenerateReport();
    }
}

根据我一直关注的文档,使用

button.eventClick += ButtonClick;

应添加ButtonClick为按钮的单击处理程序.但是,单击按钮不会执行任何操作.处理程序开头的调试消息("HIGH LOGIC"消息)不会显示(注意:有关将按钮添加到UI的早期调试消息确实如此).游戏的调试面板或VS中不会显示任何错误消息.

我也尝试过使用new MouseEventHandler(ButtonClick),因为VS内联文档告诉我类型eventClick是MouseEventHandler.这不会在VS或游戏中显示任何错误,但也不起作用.

(注:还有就是 官方文档,但它的旁边没有用的.)

这里有没有人有C:S API的经验？为什么这个事件没有被调用？