OnPostProcessBuild関係 メモ書き ref: http://qiita.com/satotin/items/a56de689bca82e24df29

file0.txt

#if NOTIFICATION_SYSTEM_ENABLE
    // Change value of CFBundleVersion in Xcode plist
    var buildKey = "UIBackgroundModes";
    plist.root.CreateArray (buildKey).AddString ("remote-notification");
#endif

file1.txt

/// <summary>
/// プッシュ通知追加位置に使用する状態
/// </summary>
private enum FindEnum
{
    INITIAL = 0,
    FIND_CAPABILITIES,
    PROVISIONING_STYLE,
    NON_CAPABILITIES,
    ADD_END
} 

/// <summary>
/// entitlementsファイル拡張子
/// </summary>
private const string ENTITLEMENTS_SUFFIX = ".entitlements";

/// <summary>
/// PBXプロジェクトファイルパス
/// </summary>
private const string PBX_PROJECT_FILE_PATH = "/Unity-iPhone.xcodeproj/project.pbxproj";

/// <summary>
/// アプリ名.
/// </summary>
private const string APP_NAME = "アプリ名";

/// <summary>
/// Capabilitiesの発見開始の文字列
/// </summary>
private const string CAPABILITIES_FIND_STRING = "/* Begin PBXProject section */";

/// <summary>
/// Capabilities文字列の１つ上の行を検索するための文字列
/// </summary>
private const string PROVISIONINGSTYLE_STRING = "ProvisioningStyle";

/// <summary>
/// SystemCapabilitiesキー検索用の文字列
/// </summary>
private const string SYSTEMCAPABILITIES_STRING = "SystemCapabilities";

/// XCodeプロジェクト名.
/// Unityでビルドした際のデフォルトターゲット名は"Unity-iPhone".
private const string XCODE_PROJECT_NAME = "Unity-iPhone";

/// iOSのプラグインディレクトリパス.
private const string IOS_PLUGINS_DIR_PATH = "Assets/Plugins/iOS";

/// XCodeのInfo.plistファイル名.
private const string XCODE_INFO_PLIST_FILE_NAME = "Info.plist";

file2.txt

/// <summary>
/// プッシュ通知設定をXcodeの設定に追加する。
/// </summary>
/// <param name="path">Path.=ファイルをreadするパス</param>
private static void AddPushNotificationCapabilities(string path)
{
    string projPath = path + PBX_PROJECT_FILE_PATH;
    PBXProject proj = new PBXProject ();
    proj.ReadFromString (File.ReadAllText (projPath));

    List<string> pbxLineList = new List<string> ();
    List<string> pbxSaveLineList = new List<string> ();

    string[] lines = proj.WriteToString().Split ('\n');
    pbxLineList.AddRange (lines);

    int loopMax = pbxLineList.Count;

    FindEnum FindState = FindEnum.INITIAL;

    for(int i = 0; i < loopMax; i++)
    {
        // XcodeProject保存用リストに追加
        pbxSaveLineList.Add (pbxLineList [i]);

        if (pbxLineList [i].IndexOf (CAPABILITIES_FIND_STRING) >= 0) 
        {
            FindState = FindEnum.FIND_CAPABILITIES;
        }

        if ((FindState == FindEnum.FIND_CAPABILITIES) &&
            (pbxLineList [i].IndexOf (PROVISIONINGSTYLE_STRING) >= 0))
        {
            FindState = FindEnum.PROVISIONING_STYLE;
        }

        if (FindState == FindEnum.PROVISIONING_STYLE) 
        {
            // capabilities文字列が存在しない
            if (pbxLineList [i + 1].IndexOf (SYSTEMCAPABILITIES_STRING) < 0) {
                // capabilities
                pbxSaveLineList.Add ("SystemCapabilities = {");
                FindState = FindEnum.NON_CAPABILITIES;
            }
            else 
            {
                i++;
                pbxSaveLineList.Add (pbxLineList [i]);
            }


            // push add
            pbxSaveLineList.Add("com.apple.Push = {");
            pbxSaveLineList.Add("enabled = 1;");
            pbxSaveLineList.Add("};");

            // capabilities文字列が存在しない
            if (FindState == FindEnum.NON_CAPABILITIES) 
            {
                // capabilitiesの閉じカッコ
                pbxSaveLineList.Add("}");
            }
            FindState = FindEnum.ADD_END;
        }
    }

    File.WriteAllText(projPath, string.Join ("\n", pbxSaveLineList.ToArray ()));
}

file3.txt

string projPath = path + "/Unity-iPhone.xcodeproj/project.pbxproj";
PBXProject proj = new PBXProject ();
proj.ReadFromString (File.ReadAllText (projPath));

file4.txt

/* Begin PBXProject section */

file5.txt

ProvisioningStyle

file6.txt

SystemCapabilities

file7.txt

SystemCapabilities = { 

file8.txt

com.apple.Push = {
enabled = 1;
};