unity跨平台及热更新学习笔记(一)

C#中通过程序域实现DLL的动态加载与卸载。

创建C#控制台程序，项目结构如下:

HotUpdate是一个控制台应用程序,CommonLib、MoudleAdditive是两个类库。

CommonLib中的代码:

1 using System;
2 
3 namespace CommonLib
4 {
5     public interface ICalculater
6     {
7         int Calculater(int a, int b);
8     }
9 }

MoudleAdditive中的代码:

 1 using CommonLib;
 2 using System;
 3 
 4 namespace MoudleAdditive
 5 {
 6     public class MoudleAdditive : MarshalByRefObject, ICalculater
 7     {
 8         public int Calculater(int a, int b)
 9         {
10             int res = a + b;
11             Console.WriteLine("相加结果:" + res + " [Current Domain :" + AppDomain.CurrentDomain.FriendlyName + "]");
12             return res;
13         }
14     }
15 }

HotUpdate中的代码:

 1 using CommonLib;
 2 using System;
 3 using System.IO;
 4 
 5 namespace HotUpdate
 6 {
 7     class Program
 8     {
 9         static void Main(string[] args)
10         {
11             Console.WriteLine("Current Domain : " + AppDomain.CurrentDomain.FriendlyName + Environment.NewLine);
12             Console.WriteLine("输入两个数字(a,b),计算结果:");
13             Console.Write("a = ");
14             int a = Convert.ToInt32(Console.ReadLine());
15             Console.Write("b = ");
16             int b = Convert.ToInt32(Console.ReadLine());
17 
18             AppDomain additiveDomain = AppDomain.CreateDomain("Domain #Calculater");
19             ICalculater calculater = (ICalculater)additiveDomain.CreateInstanceAndUnwrap("MoudleAdditive", "MoudleAdditive.MoudleAdditive");
20             calculater.Calculater(a, b);
21 
22             Console.WriteLine("输入 quit 退出，输入 delete 删除当前AppDomain,输入 reload 重新加载 AppDomain");
23             string command;
24             while ((command = Console.ReadLine().ToLower()) != "quit")
25             {
26                 switch (command)
27                 {
28                     case "delete":
29                         TryDelete("MoudleAdditive.dll");
30                         Console.WriteLine();
31                         break;
32                     case "unload":
33                         UnloadDomain(additiveDomain);
34                         Console.WriteLine();
35                         break;
36                     case "reload":
37                         AppDomain appDomain;
38                         if (ReloadDomain(out appDomain))
39                         {
40                             ICalculater cal = (ICalculater)appDomain.CreateInstanceAndUnwrap("MoudleAdditive", "MoudleAdditive.MoudleAdditive");
41                             cal.Calculater(a, b);
42                         }
43                         Console.WriteLine();
44                         break;
45                     default:
46                         break;
47                 }
48             }
49 
50             Console.ReadKey();
51         }
52 
53         static void TryDelete(string filename)
54         {
55             try
56             {
57                 string fullName = AppDomain.CurrentDomain.BaseDirectory + filename;
58                 File.Delete(fullName);
59                 Console.WriteLine("成功删除文件 :{0}", fullName);
60             }
61             catch (Exception e)
62             {
63                 Console.WriteLine("删除文件: {0} 失败，{1}", filename, e.Message);
64             }
65         }
66 
67         static void UnloadDomain(AppDomain appDomain)
68         {
69             if (null == appDomain) return;
70             string appDomainName = appDomain.FriendlyName;
71             AppDomain.Unload(appDomain);
72             Console.WriteLine("卸载程序域 {0} 成功!", appDomainName);
73         }
74 
75         static bool ReloadDomain(out AppDomain appDomain)
76         {
77             try
78             {
79                 appDomain = AppDomain.CreateDomain("Domain #Calculater");
80                 Console.WriteLine("Domain reloaded, name : Domain #Calculater");
81                 return true;
82             }
83             catch
84             {
85                 appDomain = null;
86                 return false;
87             }
88         }
89     }
90 }

详细原理,请参看:https://www.cnblogs.com/Leo_wl/p/4255533.html