前言:

在Unity里面能走到这一步的，多半前面已经经历了iOS 和Unity传值交互的痛苦历程。有了前面的代码经验，这次要做的事情，就是在交互基础之上，了解如何自动配置Unity生成Xcode项目，使得每次打包即可真机调试而不必每次都要去修改签名证书，添加framework累死个人。

传值系列

iOS Unity 交互（系列一）Unity调用iOS函数 Unity给iOS传值
iOS Unity 交互（系列二）iOS调用Unity函数 iOS给Unity传值
iOS Unity 交互（系列三）iOS Unity互传参数与完整示例代码
iOS Unity 交互（系列四）Unity调用iOS SDK

本次实验的环境：

1、苹果电脑安装：Xcode（Version 13.2.1 (13C100)），Unity（Version 2020.3.25f1c1 Personal），VSCode（这个随意吧）

2、苹果手机真机，用于调试。

实现场景

Unity集成支付宝和微信SDK。
让Unity生成Xcode项目，并且在生成Xcode项目的时候，脚本自动配置Xcode项目所需要的 framework，info.plist，代码签名，证书，等等。
生成项目之后即可调用支付宝和微信SDK进行付款操作。

备注

操作太多了，仔细写要写上大半天。这里就直接贴图讲解细节和一些注意的点。

工程的初始化配置

1.png

关于支付宝SDK

原始的支付宝SDK是同时支持真机架构和模拟器架构的。如果直接导入原始支付宝SDK到Unity项目里，生成的Xcode项目在运行的时候会报错，会给你搞出什么 arm64 architecture 之类的错误。所以我们需要把支付宝SDK里面的模拟器架构剔除。微信SDK则不需要。
在命令行里运行以下代码：

//1 切换到外层的文件夹,查看架构
cd /Users/zhaoxin/Desktop/Ali_iOS_SDK
lipo -info AlipaySDK.framework/AlipaySDK

//2 切换到 cd /Users/zhaoxin/Desktop/Ali_iOS_SDK/AlipaySDK.framework 剔除模拟器
lipo -remove i386 AlipaySDK -o AlipaySDK
lipo -remove x86_64 AlipaySDK -o AlipaySDK

2.png

关于生成Xcode项目

Unity现在已经可以在面板上直接配置项目的某些参数，以前好像是要写脚本代码去改的。
在Unity里面依次寻找：File → Build Settings → Player Settings，如下图：

3.png

我的示例代码文件目录结构

4.png

图片中的示例代码：

C# 脚本代码 AliWxPayDemo

using System.Runtime.InteropServices;
using UnityEngine;

public class AliWxPayDemo : MonoBehaviour
{

    //定义函数 支付宝支付
    [DllImport("__Internal")]
    private static extern void IOSAliPay(string objectName, string payOrder, string scheme);

    //注册微信
    [DllImport("__Internal")]
    private static extern void IOSRegistWxApi(string objectName, string WXAppKey, string WXAppUniversalLink);
    //定义函数 微信支付
    [DllImport("__Internal")]
    private static extern void IOSWxPay(string openID, string partnerId, string prepayId, string nonceStr, string timeStamp, string package, string sign);

    void Start() { }

    void Update() { }

    void OnGUI()
    {
        if (GUI.Button(new Rect(150, 400, 700, 150), "点击使用支付宝"))
        {
            string alipay = "这个支付字符串来自于后端,在传参的时候换成你自己的支付字符串";
            alipay = "service=mobile.securitypay.pay&partner=608896586645411740&_input_charset=utf-8&notify_url=http%7A%6F%6Fopen.jike%6Fcallback%6Falipay&out_trade_no=60664894135456448&subject=%88%B1%E5%8A%A8-%E8%AF%BE%E7%A8%8B%E9%A6%84%E7%BA%A6-606601665448&body=%E7%88%B1%E5%8A%A8-%E8%AF%BE%E8%8B%E9%A6%84%E7%BA%A6-60660166506448&payment_type=1&total_fee=0.01&seller_id=6088045411740&it_b_pay=70m&sign_type=RSA&sign=AYHT%6F0tyV8oG7Fs8s6YlqpnZb4nW74nmDkWCVOLRpB5aoPzOuiCp%6BSCvyXrtC6Q9IaxFXU79432y9hka9v87L880uPgPCqHaOC1kWBm%6FSGuIRM4WRukI7VdZWlF7TuXB%6BM1ZgJKFfd486132SDLliY4B4ZkDRZgetE%7D";
            IOSAliPay("PayObject", alipay, iOSPayConfig.Ali_Pay_Schema);
        }

        if (GUI.Button(new Rect(150, 800, 700, 150), "点击使用微信"))
        {
            //先注册微信
            IOSRegistWxApi("PayObject", iOSPayConfig.WXAppKey, iOSPayConfig.WXAppUniversalLink);
            //然后调用微信支付
            IOSWxPay("wx765vb987v5123d70", "1666707801", "wx661178461614106f6b7d46c6c0b640000", "8d66017766a641fab68d86a79054071", "164717894656", "Sign=WXPay", "B561D744E816D7DD015C0D76DCE99D4");
        }
    }

    //来自OC的函数 支付宝支付结果回调
    public void IOS_Ali_Pay_Result(string dictionaryString)
    {
        Debug.Log("C# 收到 支付宝 回调：" + dictionaryString);
    }

    //来自OC的函数 微信支付结果回调
    public void IOS_Wx_Pay_Result(string dictionaryString)
    {
        Debug.Log("C# 收到 微信 回调：" + dictionaryString);
    }
}

C# 脚本代码 BuildCallback

using UnityEngine;
using UnityEditor;
using UnityEditor.Build;
using UnityEditor.Build.Reporting;
using UnityEditor.Callbacks;
using UnityEditor.iOS.Xcode;
using System.IO;
using UnityEditor.XCodeEditor;
using System;

public class BuildCallback : IPreprocessBuildWithReport, IPostprocessBuildWithReport
{
    int IOrderedCallback.callbackOrder { get { return 0; } }

    System.DateTime startTime;

    //打包前事件
    void IPreprocessBuildWithReport.OnPreprocessBuild(BuildReport report)
    {
        startTime = System.DateTime.Now;
        Debug.Log("开始打包 : " + startTime);
    }

    //打包后事件
    void IPostprocessBuildWithReport.OnPostprocessBuild(BuildReport report)
    {
        System.TimeSpan buildTimeSpan = System.DateTime.Now - startTime;
        Debug.Log("打包成功，耗时 : " + buildTimeSpan);
    }

    //回调  打包后处理
    [PostProcessBuild(1)]
    public static void OnPostProcessBuild(BuildTarget target, string pathToBuiltProject)
    {
        if (target != BuildTarget.iOS)
        {
            return;
        }

        var projPath = pathToBuiltProject + "/Unity-iPhone.xcodeproj/project.pbxproj";
        var proj = new PBXProject();
        proj.ReadFromFile(projPath);
        //var targetGUID = proj.TargetGuidByName("Unity-iPhone");
        //var targetGUID = proj.GetUnityMainTargetGuid();
        var targetGUID = proj.GetUnityFrameworkTargetGuid();
        proj.AddBuildProperty(targetGUID, "OTHER_LDFLAGS", "-ObjC -all_load"); //微信开发文档要求在 Other Link Flags 里面添加 "-ObjC -all_load" 但是实际验证发现生成的Xcode项目这句比并没有添加上,然而不影响使用
        //proj.SetBuildProperty(targetGUID, "ENABLE_BITCODE", "NO");

        // 添加系统库
        // 这里是支付宝需要用到系统库,如果不引入系统库, Unity生成Xcode项目运行必定报错,各种缺
        /*
         * 举例: 如果没有引入 WebKit.framework 就会报如下错误:
         ld: warning: arm64 function not 4-byte aligned: _unwind_tester from /Users/zhaoxin/Desktop/支付宝微信合并Demo/ios_generate_proj/Libraries/libiPhone-lib.a(unwind_test_arm64.o)
         Undefined symbols for architecture arm64:
         "_OBJC_METACLASS_$_WKWebView", referenced from:
         _OBJC_METACLASS_$_MQPWebView in AlipaySDK
         */
        proj.AddFrameworkToProject(targetGUID, "libz.tbd", false);
        proj.AddFrameworkToProject(targetGUID, "libc++.tbd", false);
        proj.AddFrameworkToProject(targetGUID, "CoreText.framework", false);
        proj.AddFrameworkToProject(targetGUID, "CoreTelephony.framework", false);
        proj.AddFrameworkToProject(targetGUID, "CoreMotion.framework", false);
        proj.AddFrameworkToProject(targetGUID, "CoreGraphics.framework", false);
        proj.AddFrameworkToProject(targetGUID, "QuartzCore.framework", false);
        proj.AddFrameworkToProject(targetGUID, "UIKit.framework", false);
        proj.AddFrameworkToProject(targetGUID, "Foundation.framework", false);
        proj.AddFrameworkToProject(targetGUID, "CFNetwork.framework", false);
        proj.AddFrameworkToProject(targetGUID, "SystemConfiguration.framework", false);
        proj.AddFrameworkToProject(targetGUID, "WebKit.framework", false);
        // 这里是微信需要使用到的系统库
        proj.AddFrameworkToProject(targetGUID, "CoreGraphics.framework", false);
        proj.AddFrameworkToProject(targetGUID, "WebKit.framework", false);
        proj.AddFrameworkToProject(targetGUID, "Security.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "VideoToolbox.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "StoreKit.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "Security.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "ReplayKit.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "Photos.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "MultipeerConnectivity.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "MobileCoreServices.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "MetalPerformanceShaders.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "MediaToolbox.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "MediaPlayer.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "libresolv.9.tbd", false);
        //proj.AddFrameworkToProject(targetGUID, "libiconv.tbd", false);
        //proj.AddFrameworkToProject(targetGUID, "libcompression.tbd", false);
        //proj.AddFrameworkToProject(targetGUID, "libc++abi.tbd", false);
        //proj.AddFrameworkToProject(targetGUID, "JavaScriptCore.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "GLKit.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "AVFoundation.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "AudioToolbox.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "AssetsLibrary.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "Accelerate.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "AuthenticationServices.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "libil2cpp.a", false);
        //proj.AddFrameworkToProject(targetGUID, "libiPhone-lib.a", false);
        //proj.AddFrameworkToProject(targetGUID, "AuthenticationServices.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "AVKit.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "CoreMedia.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "CoreVideo.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "OpenAL.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "OpenGLES.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "libiconv.2.dylib", false);
        //proj.AddFrameworkToProject(targetGUID, "LightGameSDK.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "Metal.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "libresolv.9.tbd", false);
        //proj.AddFrameworkToProject(targetGUID, "CoreLocation.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "ImageIO.framework", false);
        //proj.AddFrameworkToProject(targetGUID, "AdSupport.framework", false);

        proj.WriteToFile(projPath);

        var plistPath = Path.Combine(pathToBuiltProject, "Info.plist");
        var plist = new PlistDocument();
        plist.ReadFromFile(plistPath);
        PlistElementDict rootDict = plist.root;
        plist.root.SetString("NSPhotoLibraryAddUsageDescription", "需要相册权限");
        plist.root.SetString("NSPhotoLibraryUsageDescription", "需要相册权限");
        plist.root.SetString("NSCalendarsUsageDescription", "需要日历权限");
        plist.root.SetString("NSMicrophoneUsageDescription", "录制屏幕需要麦克风权限");
        plist.root.SetString("NSCameraUsageDescription", "需要相机权限");
        plist.root.SetString("NSLocationWhenInUseUsageDescription", "需要定位权限");

        // plist 里面 允许 http 请求
        if (rootDict.values.ContainsKey("NSAppTransportSecurity"))
        { rootDict.values.Remove("NSAppTransportSecurity");}
        PlistElementDict urlDict = rootDict.CreateDict("NSAppTransportSecurity");
        urlDict.SetBoolean("NSAllowsArbitraryLoads", true);


        //添加各种白名单
        PlistElementArray queriesSchemes = rootDict.CreateArray("LSApplicationQueriesSchemes");
        //queriesSchemes.AddString("douyinsharesdk");
        //queriesSchemes.AddString("douyinopensdk");
        //queriesSchemes.AddString("snssdk1128");
        //queriesSchemes.AddString("toutiaoopensdk");
        //queriesSchemes.AddString("wechat");  //微信白名单
        queriesSchemes.AddString("weixinULAPI"); //微信白名单
        queriesSchemes.AddString("weixin");  //微信白名单

        //配置urlSchemes（数组里面有字典，字典里面有子数组）
        PlistElementArray urlTypes = plist.root.CreateArray("CFBundleURLTypes");
        PlistElementDict itemDict;
        //添加支付宝的 URL Scheme
        itemDict = urlTypes.AddDict();
        itemDict.SetString("CFBundleTypeRole", "Editor");
        itemDict.SetString("CFBundleURLName", "AliPay");
        PlistElementArray zhifubaoSchemesArray = itemDict.CreateArray("CFBundleURLSchemes");
        zhifubaoSchemesArray.AddString(iOSPayConfig.Ali_Pay_Schema);

        //添加微信的 URL Scheme
        itemDict = urlTypes.AddDict();
        itemDict.SetString("CFBundleTypeRole", "Editor");
        itemDict.SetString("CFBundleURLName", "weixin");
        PlistElementArray weixinSchemes = itemDict.CreateArray("CFBundleURLSchemes");
        weixinSchemes.AddString(iOSPayConfig.WXAppKey);

        //添加第2个
        //itemDict = urlTypes.AddDict();
        //itemDict.SetString("CFBundleTypeRole", "Editor");
        //PlistElementArray schemesArray2 = itemDict.CreateArray("CFBundleURLSchemes");
        //schemesArray2.AddString("xxxx");
        //添加第3个
        //itemDict = urlTypes.AddDict();
        //itemDict.SetString("CFBundleTypeRole", "Editor");
        //itemDict.SetString("CFBundleURLName", "xxxx");
        //PlistElementArray schemesArray3 = itemDict.CreateArray("CFBundleURLSchemes");
        //schemesArray3.AddString("xxxx");

        File.WriteAllText(plistPath, plist.WriteToString());
        plist.WriteToFile(plistPath);


        //编辑 Capability  在我这个版本,即使不添加 AssociatedDomains 也没有关系, 因为微信不走 - (BOOL)application:(UIApplication *)application continueUserActivity:(NSUserActivity *)userActivity 这个方法
        //在高版本原生iOS App中,需要在 AssociatedDomains 里面配置微信的 UniversalLink 用于接收微信的回调
        AddCapability(proj, pathToBuiltProject);

        //编辑代码文件 得到xcode工程的路径
        string path = Path.GetFullPath(pathToBuiltProject);
        EditorCode(path);

        UnityEngine.Debug.Log("Xcode 后续处理完成");
    }

    //编辑Xcode代码文件
    private static void EditorCode(string filePath)
    {
        //读取UnityAppController.mm文件
        XClass UnityAppController = new XClass(filePath + "/Classes/UnityAppController.mm");

        //在Xcode工程入口处导入类 iOSPayHelper.h, 这个代码文件集成了 支付宝和微信支付的入口
        UnityAppController.WriteBelow("#import \"UnityAppController.h\"", "#import \"iOSPayHelper.h\"");

        //支付宝
        //在Xcode工程入口函数 openurl 里添加处理支付回调拉起UnityApp的处理
        UnityAppController.WriteBelow("AppController_SendNotificationWithArg(kUnityOnOpenURL, notifData);", "    [[iOSPayHelper shared] handleAliPayURL:url];");

        //微信
        //注册微信, 一定是要在 - (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions 这里面注册微信, 如果只是从你写的 .mm 文件里面,使用支付的时候才去注册, 验证结果也是生效的, 为了防止后续因为版本缘故导致失效, 下面这两行写在 App启动入口的函数保留使用
        //string code = "    [WXApi registerApp:" + "@\"" + iOSPayConfig.WXAppKey + "\" " + "universalLink:" + "@\"" + iOSPayConfig.WXAppUniversalLink + "\"" + "];";
        //UnityAppController.WriteBelow("[KeyboardDelegate Initialize];", code);
        //在AppDelegate里面添加匿名分类,添加一个协议
        UnityAppController.WriteBefore("@implementation UnityAppController", "@interface UnityAppController()<WXApiDelegate>\n@end");
        //注意,在这3个函数里面, 最好都要添加微信处理的回调处理, 自己创建空白的项目然后使用微信支付 和 从Unity生成出来的项目使用微信支付, 微信的回调走的不是同一个 Application 里面的回调函数.
        //在这3个地方都添加回调处理,可以最大范围涵盖微信可能走的系统回调函数, 也是因为这个, 花了大量时间去验证.
        UnityAppController.WriteBefore("NSURL* url = userActivity.webpageURL;", "  [WXApi handleOpenUniversalLink:userActivity delegate:self];");
        UnityAppController.WriteBefore("- (BOOL)application:(UIApplication *)application continueUserActivity:(NSUserActivity *)userActivity", "- (BOOL)application:(UIApplication*)application handleOpenURL: (NSURL*)url {return [WXApi handleOpenURL: url delegate:self];}");
        UnityAppController.WriteBelow("AppController_SendNotificationWithArg(kUnityOnOpenURL, notifData);", "[WXApi handleOpenURL: url delegate:self];");
        //添加微信的代理函数
        UnityAppController.WriteBefore("- (BOOL)application:(UIApplication*)application willFinishLaunchingWithOptions:(NSDictionary*)launchOptions", "- (void)onResp:(BaseResp *)resp {\n    [[iOSPayHelper shared] handleWxPayResp:resp];\n}");
    }

    //添加 Capability
    private static void AddCapability(PBXProject project, string pathToBuiltProject)
    {
        //string target = project.TargetGuidByName(PBXProject.GetUnityTargetName());
        var target = project.GetUnityFrameworkTargetGuid();

        // Add BackgroundModes And Need to modify info.plist
        //project.AddCapability(target, PBXCapabilityType.BackgroundModes);
        //project.AddCapability(target, PBXCapabilityType.InAppPurchase);
        //project.AddCapability(target, PBXCapabilityType.AssociatedDomains);

        // Need Create entitlements
        string relativeEntitlementFilePath = "Unity-iPhone/Unity-iPhone.entitlements";
        string absoluteEntitlementFilePath = pathToBuiltProject + "/" + relativeEntitlementFilePath;

        PlistDocument tempEntitlements = new PlistDocument();

        //添加钥匙串
        //string key_KeychainSharing = "keychain-access-groups";
        //var arr = (tempEntitlements.root[key_KeychainSharing] = new PlistElementArray()) as PlistElementArray;
        //arr.values.Add(new PlistElementString("$(AppIdentifierPrefix)com.tencent.xxxx"));
        //arr.values.Add(new PlistElementString("$(AppIdentifierPrefix)com.tencent.wsj.keystoregroup"));

        //添加推送
        //string key_PushNotifications = "aps-environment";
        //tempEntitlements.root[key_PushNotifications] = new PlistElementString("development");

        //添加关联网址
        string key_Associated = "com.apple.developer.associated-domains";
        var arr_Ass = (tempEntitlements.root[key_Associated] = new PlistElementArray()) as PlistElementArray;
        arr_Ass.values.Add(new PlistElementString(iOSPayConfig.WXAssociatedDomains));
        arr_Ass.values.Add(new PlistElementString(""));

        project.AddCapability(target, PBXCapabilityType.AssociatedDomains, relativeEntitlementFilePath);
        //project.AddCapability(target, PBXCapabilityType.PushNotifications, relativeEntitlementFilePath);
        //project.AddCapability(target, PBXCapabilityType.KeychainSharing, relativeEntitlementFilePath);

        string projPath = PBXProject.GetPBXProjectPath(pathToBuiltProject);
        File.WriteAllText(projPath, project.WriteToString());
        tempEntitlements.WriteToFile(absoluteEntitlementFilePath);

        ModifyEntitlementFile(absoluteEntitlementFilePath);
    }

    private static void ModifyEntitlementFile(string absoluteEntitlementFilePath)
    {
        if (!File.Exists(absoluteEntitlementFilePath)) return;

        try
        {
            StreamReader reader = new StreamReader(absoluteEntitlementFilePath);
            var content = reader.ReadToEnd().Trim();
            reader.Close();

            var needFindString = "<?xml version=\"1.0\" encoding=\"utf-8\"?>";
            var changeString = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + "\n" + "<!DOCTYPE plist PUBLIC \"-//Apple//DTD PLIST 1.0//EN\" \"http://www.apple.com/DTDs/PropertyList-1.0.dtd\">";
            Debug.Log("Before: " + content);
            content = content.Replace(needFindString, changeString);
            Debug.Log("After: " + content);
            StreamWriter writer = new StreamWriter(new FileStream(absoluteEntitlementFilePath, FileMode.Create));
            writer.WriteLine(content);
            writer.Flush();
            writer.Close();
        }
        catch (Exception e)
        {
            Debug.Log("ModifyEntitlementFile - 失败了伙计 Failed: " + e.Message);
        }
    }

}

C# 脚本代码 XClass

using UnityEngine;
using System.IO;

namespace UnityEditor.XCodeEditor
{
    public partial class XClass : System.IDisposable
    {
        private string filePath;

        public XClass(string fPath)
        {
            filePath = fPath;
            if (!System.IO.File.Exists(filePath))
            {
                Debug.LogError(filePath + "路径下文件不存在");
                return;
            }
        }

        public void WriteBelow(string below, string text)
        {
            StreamReader streamReader = new StreamReader(filePath);
            string text_all = streamReader.ReadToEnd();
            streamReader.Close();

            int beginIndex = text_all.IndexOf(below);
            if (beginIndex == -1)
            {
                Debug.LogError(filePath + "中没有找到标志" + below);
                return;
            }

            int endIndex = text_all.LastIndexOf("\n", beginIndex + below.Length);

            text_all = text_all.Substring(0, endIndex) + "\n" + text + "\n" + text_all.Substring(endIndex);

            StreamWriter streamWriter = new StreamWriter(filePath);
            streamWriter.Write(text_all);
            streamWriter.Close();
        }

        public void WriteBefore(string before, string text)
        {
            StreamReader streamReader = new StreamReader(filePath);
            string text_all = streamReader.ReadToEnd();
            streamReader.Close();

            int beginIndex = text_all.IndexOf(before);  //找开始的索引
            if (beginIndex == -1)
            {
                Debug.LogError(filePath + "中没有找到标志" + before);
                return;
            }

            text_all = text_all.Substring(0, beginIndex) + text + "\n\n" + text_all.Substring(beginIndex);

            StreamWriter streamWriter = new StreamWriter(filePath);
            streamWriter.Write(text_all);
            streamWriter.Close();
        }

        public void Replace(string below, string newText)
        {
            StreamReader streamReader = new StreamReader(filePath);
            string text_all = streamReader.ReadToEnd();
            streamReader.Close();

            int beginIndex = text_all.IndexOf(below);
            if (beginIndex == -1)
            {
                Debug.LogError(filePath + "中没有找到标致" + below);
                return;
            }

            text_all = text_all.Replace(below, newText);
            StreamWriter streamWriter = new StreamWriter(filePath);
            streamWriter.Write(text_all);
            streamWriter.Close();

        }

        public void Dispose()
        {

        }
    }
}

C# 脚本代码 iOSPayConfig

// 支付SDK使用到的常量定义类
// 注意,这个类放到 Assets 目录下面
public static class iOSPayConfig
{
    //支付宝使用到的 Schema
    //1 用在支付方法里,作为参数
    //2 在Unity工程导出Xcode工程后,写如到 info.plist 当中作为支付宝拉起Unity App的接口. (这部分功能已经写入到脚本自动添加)
    public static string Ali_Pay_Schema = "支付宝给你的Schema";


    //微信使用到的 Key
    //1 在Unity工程导出Xcode工程后,写如到 info.plist 当中作为支付宝拉起Unity App的接口. (这部分功能已经写入到脚本自动添加)
    public static string WXAppKey = "微信给你的AppKey";
    //2 在Unity工程导出Xcode工程后,写如到 info.plist 当中作为支付宝拉起Unity App的接口. (这部分功能已经写入到脚本自动添加)
    public static string WXAppUniversalLink = "微信给你的UniversalLink";
    //3 微信 Associated Domains 链接
    public static string WXAssociatedDomains = "微信给你的 Associated url 去微信开放平台弄"; //这个需要在微信开放平台去配置,把微信给的链接写到项目里,这里是直接改代码文件硬写.

}

iOS 代码 iOSPayHelper.h

//
//  iOSPayHelper.h
//  UnityFramework
//
//  Created by 童年的大灰狼 on 2020/5/13.
//

#import <Foundation/Foundation.h>
#import <AlipaySDK/AlipaySDK.h>
#import "WXApi.h"

@interface iOSPayHelper : NSObject

///单例对象
+ (instancetype)shared;

///处理支付回调URL
- (void)handleAliPayURL:(NSURL *)url;
///支付宝支付
- (void)AliPayOrder:(NSString *)orderStr;
///支付宝 挂载的Unity对象
@property (nonatomic, strong) NSString *gameobject_Ali;
///支付宝使用的 Schema
@property (nonatomic, strong) NSString *ali_schemeStr;

///处理微信支付的回调
- (void)handleWxPayResp:(BaseResp *)resp;
///微信 挂载的Unity对象
@property (nonatomic, strong) NSString *gameobject_Wx;

@end

iOS 代码 iOSPayHelper.mm

//
//  iOSPayHelper.m
//  UnityFramework
//
//  Created by 童年的大灰狼 on 2020/5/13.
//

#import "iOSPayHelper.h"

@interface iOSPayHelper()

@end

@implementation iOSPayHelper

static iOSPayHelper *_sharedInstance = nil;

static dispatch_once_t onceToken;

+ (instancetype)shared {
    dispatch_once(&onceToken, ^{
        _sharedInstance = [[iOSPayHelper alloc] init];
    });
    return _sharedInstance;
}

- (instancetype)init {
    self = [super init];
    if (self) {
    }
    return self;
}


- (void)AliPayOrder:(NSString *)orderStr {
    [[AlipaySDK defaultService] payOrder:orderStr fromScheme:self.ali_schemeStr callback:^(NSDictionary *resultDic) {
        NSLog(@"🌤🌤🌤 %s", __func__);
        [self executeCompleteBlock:resultDic];
    }];
}

- (void)handleAliPayURL:(NSURL *)url {
    if ([url.scheme isEqualToString:self.ali_schemeStr]) {
        [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"🌤🌤🌤 %s", __func__);
            [self executeCompleteBlock:resultDic];
        }];
    }
}

- (void)executeCompleteBlock:(NSDictionary *)resultDic {
    //    返回码    含义
    //    9000    订单支付成功
    //    8000    正在处理中，支付结果未知（有可能已经支付成功），请查询商户订单列表中订单的支付状态
    //    4000    订单支付失败
    //    5000    重复请求
    //    6001    用户中途取消
    //    6002    网络连接出错
    //    6004    支付结果未知（有可能已经支付成功），请查询商户订单列表中订单的支付状态
    //    其它    其它支付错误
    
    NSInteger resultCode = [resultDic[@"resultStatus"] integerValue];
    NSString *msg = nil;
    if (resultCode ==  9000) {
        msg = @"订单支付成功";
    } else if (resultCode ==  8000) {
        msg = @"支付结果未知，请查询商户订单列表中订单的支付状态";
    } else if (resultCode ==  5000) {
        msg = @"重复请求";
    } else if (resultCode ==  6001) {
        msg = @"用户中途取消";
    } else if (resultCode ==  6002) {
        msg = @"网络连接出错";
    } else if (resultCode ==  6004) {
        msg = @"支付结果未知，请查询商户订单列表中订单的支付状态";
    } else {
        msg = @"订单支付失败";
    }
    
    NSMutableDictionary *tempdic = [NSMutableDictionary dictionaryWithDictionary:resultDic];
    [tempdic setObject:msg forKey:@"iOS_Add_Msg"];
    
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:tempdic options:NSJSONWritingPrettyPrinted error:nil];
    NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
    NSLog(@"🌤🌤🌤 iOS 收到支付宝回调结果: resultDic = %@",resultDic);
    UnitySendMessage([self.gameobject_Ali UTF8String], "IOS_Ali_Pay_Result", [jsonString UTF8String]);
}



///注册微信支付
- (void)registerApp:(NSString *)WXAppKey universalLink:(NSString *)WXAppUniversalLink {
    [WXApi registerApp:WXAppKey universalLink:WXAppUniversalLink];
}

///微信支付
- (void)WxPayReq:(PayReq *)req {
    //调起微信支付,包装参数
    [WXApi sendReq:req completion:^(BOOL success) {}];
}

///处理微信支付的回调
- (void)handleWxPayResp:(BaseResp *)resp {
    
    if ([resp isKindOfClass:[PayResp class]]) {
        //微信支付回调中errCode值列表：
        //名称   描述        解决方案
        //0     成功        展示成功页面
        //-1    错误        可能的原因：签名错误、未注册APPID、项目设置APPID不正确、注册的APPID与设置的不匹配、其他异常等。
        //-2    用户取消     无需处理。发生场景：用户不支付了，点击取消，返回APP。
        NSString *msg = @"";
        if (resp.errCode == WXSuccess) {
            msg = @"支付成功";
        } else if(resp.errCode == WXErrCodeUserCancel) {
            msg = @"用户取消";
        } else {
            msg = @"支付失败";
        }
        NSMutableDictionary *tempdic = [NSMutableDictionary dictionary];
        [tempdic setObject:msg forKey:@"iOS_Add_Msg"];
        [tempdic setObject:@(resp.errCode) forKey:@"errCode"];
        if (resp.errStr) {
            [tempdic setObject:resp.errStr forKey:@"errStr"];
        }
        [tempdic setObject:@(resp.type) forKey:@"type"];
        
        NSData *jsonData = [NSJSONSerialization dataWithJSONObject:tempdic options:NSJSONWritingPrettyPrinted error:nil];
        NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
        NSLog(@"🌤🌤🌤 iOS 收到微信回调结果: tempdic = %@", tempdic);
        UnitySendMessage([self.gameobject_Wx UTF8String], "IOS_Wx_Pay_Result", [jsonString UTF8String]);
    } else {
        NSLog(@"🌤🌤🌤 iOS 收到微信支付回调对象错误! 这不是支付完成的类实例对象");
    }
}

@end


#ifdef __cplusplus
extern "C" {
#endif

///支付宝
extern void IOSAliPay(const char *objName, const char *payOrder, const char *scheme) {
    NSString *o = [NSString stringWithUTF8String:objName];
    NSString *p = [NSString stringWithUTF8String:payOrder];
    NSString *s = [NSString stringWithUTF8String:scheme];
    [iOSPayHelper shared].gameobject_Ali = o;
    [iOSPayHelper shared].ali_schemeStr = s;
    [[iOSPayHelper shared] AliPayOrder:p];
}


///需要注册微信
extern void IOSRegistWxApi(const char *objName, const char *WXAppKey, const char *WXAppUniversalLink) {
    NSString *o = [NSString stringWithUTF8String:objName];
    [iOSPayHelper shared].gameobject_Wx = o;
    NSString *k = [NSString stringWithUTF8String:WXAppKey];
    NSString *l = [NSString stringWithUTF8String:WXAppUniversalLink];
    [[iOSPayHelper shared] registerApp:k universalLink:l];
}

///微信
extern void IOSWxPay(const char *openID, const char *partnerId, const char *prepayId, const char *nonceStr, const char *timeStamp, const char *package, const char *sign) {
    //调起微信支付,包装参数
    PayReq *req      = [[PayReq alloc] init];
    req.openID       = [NSString stringWithUTF8String:openID];
    req.partnerId    = [NSString stringWithUTF8String:partnerId];
    req.prepayId     = [NSString stringWithUTF8String:prepayId];
    req.nonceStr     = [NSString stringWithUTF8String:nonceStr];
    req.timeStamp    = (UInt32)[[NSString stringWithUTF8String:timeStamp] longLongValue];
    req.package      = [NSString stringWithUTF8String:package];
    req.sign         = [NSString stringWithUTF8String:sign];
    [[iOSPayHelper shared] WxPayReq:req];
}

#ifdef __cplusplus
}
#endif

结语

感谢以下iOS/Unity玩家的文章：

Unity打包iOS，Xcode自动打包framework

Unity 自动打包 Part1—配置Xcode工程

Unity 配置Xcode工程--添加Capability

[Unity]配置Xcode工程(2)--添加Capability

Unity3D研究院之IOS全自动编辑framework、plist、oc代码（六十七）

Unity编译到Xcode自动添加文件及代码修改

Unity导出XCode工程的时候自动修改工程设置添加依赖

Unity 打包IOS（自动化构建）

Unity配置Xcode脚本

Unity配置Xcode脚本

IOS自动化打包，自动导入并修改文件

Unity3d Android IOS 自动设置 签名和输出 路径

Unity 打包IOS（自动化构建）

[Unity]腾讯SDK踩坑之路（2）--配置Xcode工程（MSDK和米大师配置代码冲突）

使用PostProcessBuild设定Unity产生的Xcode Project

Unity iOS Xcode 自动化一些记录

Unity成功导出Xcode工程后自动修改一些设置

报错指引

iOS 微信支付SDK -canOpenURL: failed for URL: "weixinULAPI://"

微信支付无法回调函数,iOS端微信支付成功失败无法收到不执行回调微信回调函数的原因...

Undefined symbols for architecture arm64解决方案

Undefined symbols for architecture arm64:问题解决方法

解决Undefined symbols for architecture arm64问题

iOS 支付宝SDK接入详解

iOS framework分离与合并 删除SDK中的i386，x86_86架构

iOS开发 删除framework里支持模拟器的架构

微信开放平台

微信开放平台 iOS Demo下载页面

微信开放平台 iOS SDK接入官方文档