问ios 获取不到腾讯静默推送的自定义字段？

{
    aps =     {
        alert = "<null>";
        "badge_type" = 0;
        category = "";
        "content-available" = 1;
        sound = "";
    };
    xg =     {
        bid = 12709151733xxxxxxxx;
        groupId = "00:tpns_20200611";
        guid = 1;
        msgid = 1270915173xxxxxxx;
        msgtype = 2;
        pushTime = 1591844xxx;
        source = 0;
        targettype = 4;
        templateId = "";
        traceId = "";
        ts = 1591844xxx;
        xgToken = xxxxxxx;
    };
}