C# 反射不调用方法

Question

我正在使用带反射的 Unity，我试图调用某个方法名称 Start，但我的代码没有调用它

这是 ModLoader.cs:

using UnityEngine;
using System.Collections;
using System.IO;
using System.Reflection;
using System.Collections.Generic;

public class ModLoader : MonoBehaviour {
    List<MethodInfo> modMethods = new List<MethodInfo>();

    // Use this for initialization
    void Start () {
        if (!Directory.Exists (Application.dataPath + "/../Mods")) {
            Directory.CreateDirectory (Application.dataPath + "/../Mods");
        }

        foreach (var mod in Directory.GetFiles(Application.dataPath + "/../Mods", "*.dll")) {
            var assembly = Assembly.LoadFile(mod);
            foreach (var type in assembly.GetTypes()) {
                foreach (var method in type.GetMethods()) {
                    modMethods.Add (method);
                }
            }
        }

        //Execute Start method in all mods
        foreach (MethodInfo method in modMethods) {
            print (method.Name);
            if (method.Name == "Start" && method.GetParameters().Length == 0 && method.IsStatic) {
                method.Invoke (null, new object[]{  });
            }
        }
    }

    // Update is called once per frame
    void Update () {
        //Execute Update method in all mods
        foreach (MethodInfo method in modMethods) {
            if (method.Name == "Update" && method.GetParameters().Length == 0 && method.IsStatic) {
                method.Invoke (null, new object[]{  });
            }
        }
    }
}

这是我的模组(一个.dll):

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;

public class Class1 {
    static void Start () {
        Debug.Log("hello world");

        foreach (GameObject go in GameObject.FindObjectsOfType<GameObject>()) {
            if (go.GetComponent<MeshRenderer>()) {
                go.GetComponent<MeshRenderer>().material.color = new Color(1f, 0f, 0f);
            }
        }
    }
}

我在“Mods”文件夹中有来自构建的 dll，我知道我的脚本找到了它，我只是不知道为什么没有调用方法 ID。

Answer 1

模块中的 Start 方法是私有(private)的。默认情况下，反射使用公共(public)方法。您需要将其公开:

public class Class1 {
    public static void Start () {
        Debug.Log("hello world");

        foreach (GameObject go in GameObject.FindObjectsOfType<GameObject>()) {
            if (go.GetComponent<MeshRenderer>()) {
                go.GetComponent<MeshRenderer>().material.color = new Color(1f, 0f, 0f);
            }
        }
    }
}

或指定 BindingFlags对于 GetMethods 方法。你需要 BindingFlags.Static 和 BindingFlags.NonPublic

type.GetMethods(System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.NonPublic)