Unity 升级后再导入到原有的 Xcode 项目工程会报版本不匹配的错误，Replace 会直接把之前的库、部分修改的代码覆盖掉，我们项目工程涉及到的主要有以下几个点，记录一下：

1. info.plist 增加几个常用的 key-value

    <key>LSApplicationQueriesSchemes</key>
    <array>
        <string>weixin</string>
    </array>

    <key>NSPhotoLibraryAddUsageDescription</key>
    <string>是否允许此APP访问你的媒体资料库？</string>

2. SDK:

• 重新导入 AlipaySDKFramework 及其依赖库( Xcode 11 要移除 AlipaySDK 里面 i386 和 x86_64 架构)
• 重新导入 wechat 依赖库
• Wechat 要在 UnityAppController.mm 里面注册 AppId (didFinishLaunchingWithOptions)，并在 handleOpenURL openURL里面调用 handleOpenURL回调

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
    ::printf("-> applicationDidFinishLaunching()\n");
    ...body...

    [WechatApiManager registerApp];
    return YES;
}

// UIApplicationOpenURLOptionsKey was added only in ios10 sdk, while we still support ios9 sdk
- (BOOL)application:(UIApplication*)app openURL:(NSURL*)url options:(NSDictionary<NSString*, id>*)options
{
    id sourceApplication = options[UIApplicationOpenURLOptionsSourceApplicationKey], annotation = options[UIApplicationOpenURLOptionsAnnotationKey];

    NSMutableDictionary<NSString*, id>* notifData = [NSMutableDictionary dictionaryWithCapacity: 3];
    if (url) notifData[@"url"] = url;
    if (sourceApplication) notifData[@"sourceApplication"] = sourceApplication;
    if (annotation) notifData[@"annotation"] = annotation;

       AppController_SendNotificationWithArg(kUnityOnOpenURL, notifData);
       return [WechatApiManager handleOpenURL:url];
        //return YES;
    }

    - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url
    {
        return [WechatApiManager handleOpenURL:url];
    }

3. BitCode 设置为 No
4. 由于使用了 CocoaPod 载入第三方插件，因此 pod 需要重新 intsall 一下，也很简单，terminal cd 到对应的 Pods 文件夹所在路径，重新 pod install 一下即可