feat：1、添加项目

Assets/Editor/GradleFixer.cs

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+using UnityEditor;
+using UnityEditor.Callbacks;
+using System.IO;
+using UnityEngine;
+
+public class GradleFixer
+{
+    [PostProcessBuild]
+    public static void OnPostBuild(BuildTarget target, string path)
+    {
+        if (target != BuildTarget.Android) return;
+
+        // string wrapperPath = Path.Combine(path, "gradle", "wrapper", "gradle-wrapper.properties");
+        // string customContent = "distributionUrl=gradle-8.7-bin.zip";
+        //
+        // if (File.Exists(wrapperPath))
+        // {
+        //     File.WriteAllText(wrapperPath, customContent);
+        //     Debug.Log("✅ gradle-wrapper.properties 已替换为自定义版本");
+        // }
+        // else
+        // {
+        //     Debug.LogWarning("⚠️ 未找到 gradle-wrapper.properties，可能 Unity 构建未生成 wrapper");
+        // }
+    }
+}

Assets/Editor/GradleFixer.cs.meta

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Assets/Editor/IAPDefineSymbolAdder.cs

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+using UnityEditor;
+using UnityEngine;
+using System;
+using System.Linq;
+using System.Reflection;
+
+[InitializeOnLoad]
+public static class IAPDefineSymbolAdder
+{
+    private const string SYMBOL_IAP = "UNITY_IAP";
+    private const string SYMBOL_PURCHASING = "UNITY_PURCHASING";
+
+    static IAPDefineSymbolAdder()
+    {
+        CheckAndUpdateSymbols();
+    }
+
+    [MenuItem("Tools/IAP/检查并更新宏")]
+    public static void CheckAndUpdateSymbols()
+    {
+        bool iapInstalled = IsIAPInstalled();
+
+        foreach (BuildTargetGroup group in new[] { BuildTargetGroup.Android, BuildTargetGroup.iOS })
+        {
+            string defines = PlayerSettings.GetScriptingDefineSymbolsForGroup(group);
+            var symbols = defines.Split(';').Where(s => !string.IsNullOrEmpty(s)).ToList();
+
+            if (iapInstalled)
+            {
+                // 需要宏但宏不存在 → 添加
+                bool changed = false;
+                if (!symbols.Contains(SYMBOL_IAP)) { symbols.Add(SYMBOL_IAP); changed = true; }
+                if (!symbols.Contains(SYMBOL_PURCHASING)) { symbols.Add(SYMBOL_PURCHASING); changed = true; }
+
+                if (changed)
+                {
+                    PlayerSettings.SetScriptingDefineSymbolsForGroup(group, string.Join(";", symbols));
+                    Debug.Log($"[IAP] 检测到 IAP 已安装，已为 {group} 添加宏。");
+                }
+            }
+            else
+            {
+                // 不需要宏但宏存在 → 移除
+                bool changed = symbols.Remove(SYMBOL_IAP) || symbols.Remove(SYMBOL_PURCHASING);
+
+                if (changed)
+                {
+                    PlayerSettings.SetScriptingDefineSymbolsForGroup(group, string.Join(";", symbols));
+                    Debug.Log($"[IAP] 检测到 IAP 未安装，已为 {group} 移除宏。");
+                }
+            }
+        }
+    }
+
+    private static bool IsIAPInstalled()
+    {
+        if (TypeExists("UnityEngine.Purchasing.Product"))
+            return true;
+
+        var assemblies = AppDomain.CurrentDomain.GetAssemblies();
+        if (assemblies.Any(a => a.GetName().Name.Contains("UnityEngine.Purchasing")))
+            return true;
+
+        try
+        {
+            Assembly.Load("UnityEngine.Purchasing");
+            return true;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+
+    private static bool TypeExists(string typeName)
+    {
+        try
+        {
+            return AppDomain.CurrentDomain.GetAssemblies()
+                .SelectMany(assembly =>
+                {
+                    try { return assembly.GetTypes(); }
+                    catch (ReflectionTypeLoadException e) { return e.Types.Where(t => t != null); }
+                })
+                .Any(t => t.FullName == typeName);
+        }
+        catch
+        {
+            return false;
+        }
+    }
+}

Assets/Editor/IAPDefineSymbolAdder.cs.meta

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