Blackberry 使用c++；黑莓瀑布 我使用Json web服务获取响应 当我按下一个按钮时，我必须按到新的页面，当响应成功时，其他人必须举杯——已经注册了 我将得到响应“电子邮件id已注册”或“注册成功” 当我注册成功的时候，我只需要推一个新的页面

请帮忙

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CPP文件

ApplicationUI::ApplicationUI(bb::cascades::Application *app) :
        QObject(app)
    , m_succeeded(false)
    , m_active(false)
{

    QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);
        qml->setContextProperty("app", this);
        //qml->setContextProperty("second", m_pane);

        m_root = qml->createRootObject<AbstractPane>();

        m_pane = new NavigationPane;
        app->setScene(m_root);
}

void ApplicationUI::sendRequest()
{

    if (m_active)
            return;

    m_active = true;
        emit activeChanged();

    m_succeeded = false;


    QNetworkAccessManager* networkAccessManager = new QNetworkAccessManager(this);

    QNetworkRequest request(m_urllink);

    QNetworkReply* reply = networkAccessManager->get(request);

    bool ok = connect(reply, SIGNAL(finished()), this, SLOT(onFinished()));
    Q_ASSERT(ok);
    Q_UNUSED(ok);
}

void ApplicationUI::onFinished()
{

    m_succeeded = true;

    QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());

    QString response;

if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200)
    {
            JsonDataAccess jda;

            QVariantMap map = jda.loadFromBuffer(reply->readAll()).toMap();

            QVariantList addresses = map["RegistrationResult"].toList();

            qDebug() <<"Full Result is = "<<map["RegistrationResult"].toString();

            QString m_temperature;
            QString result;


            result = map["RegistrationResult"].toString();
            m_temperature=result.section(':', 0, 0);

            m_urlResult = result;
            emit urlResultChanged();
            qDebug()<<m_urlResult;
            qDebug()<<"\n\n\n";
            if(result == "EMAIL ID ALREADY EXISTS")
            {

                        qDebug() << " New Registration Result is " <<m_temperature;
                        qDebug() <<map["RegistrationResult"].toString();

            }

            else if(result != "EMAIL ID ALREADY EXISTS")
            {

                        QString empid;
                        QString empid_no;

                        QString::SectionFlag flag = QString::SectionSkipEmpty;

                        result = map["RegistrationResult"].toString();
                        //empid=m_temperature.section(':', 1, 1);
                        empid_no = map["RegistrationResult"].toString();;
                        empid_no=empid_no.section(':', 2, 2);
                        qDebug()<<"Emd ID = "<<empid_no;
                        qDebug()<<"Company ID"<<result.section(':', 4, 4);

                       QmlDocument *qml = QmlDocument::create("asset:///second.qml").parent(this);
                       Page *new_Page = qml->createRootObject<Page>();
                       m_pane->push(new_Page);
                              **?????????????????????????????**

            }

试试这个：

在main.qml名称中，为navigationpane指定一个objectname，如：

NavigationPane {
id: navigation
objectName: "mynavigation"

在applicationui.cpp构造函数中更改以下行：

 m_root = qml->createRootObject<AbstractPane>();

    m_pane = m_root->findChild<NavigationPane*>("mynavigation");

m_root=qml->createRootObject（）；
m_pane=m_root->findChild（“mynavigation”）；

在构造second.qml后也更改这些行：

   QmlDocument *qml = QmlDocument::create("asset:///second.qml").parent(this);
               qml->setContextProperty("app", this);  


Page *new_Page = qml->createRootObject<Page>();  
m_pane->push(new_Page);

QmlDocument*qml=QmlDocument:：create（“asset:///second.qml）母公司（本公司）；
qml->setContextProperty（“应用程序”，此）；
Page*new_Page=qml->createRootObject（）；
m_窗格->推送（新建页面）；

CPP文件：

    ApplicationUI::ApplicationUI(bb::cascades::Application *app) :
        QObject(app)
    , m_succeeded(false)
    , m_active(false)
{

    QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);
        qml->setContextProperty("app", this);
        //qml->setContextProperty("second", m_pane);

        m_root = qml->createRootObject<AbstractPane>();

       m_pane = m_root->findChild<NavigationPane*>("mynavigation"); //  changed
        app->setScene(m_root);
}

void ApplicationUI::sendRequest()
{

    if (m_active)
            return;

    m_active = true;
        emit activeChanged();

    m_succeeded = false;


    QNetworkAccessManager* networkAccessManager = new QNetworkAccessManager(this);

    QNetworkRequest request(m_urllink);

    QNetworkReply* reply = networkAccessManager->get(request);

    bool ok = connect(reply, SIGNAL(finished()), this, SLOT(onFinished()));
    Q_ASSERT(ok);
    Q_UNUSED(ok);
}

void ApplicationUI::onFinished()
{

    m_succeeded = true;

    QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());

    QString response;

if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200)
    {
            JsonDataAccess jda;

            QVariantMap map = jda.loadFromBuffer(reply->readAll()).toMap();

            QVariantList addresses = map["RegistrationResult"].toList();

            qDebug() <<"Full Result is = "<<map["RegistrationResult"].toString();

            QString m_temperature;
            QString result;


            result = map["RegistrationResult"].toString();
            m_temperature=result.section(':', 0, 0);

            m_urlResult = result;
            emit urlResultChanged();
            qDebug()<<m_urlResult;
            qDebug()<<"\n\n\n";
            if(result == "EMAIL ID ALREADY EXISTS")
            {

                        qDebug() << " New Registration Result is " <<m_temperature;
                        qDebug() <<map["RegistrationResult"].toString();

            }

            else if(result != "EMAIL ID ALREADY EXISTS")
            {

                        QString empid;
                        QString empid_no;

                        QString::SectionFlag flag = QString::SectionSkipEmpty;

                        result = map["RegistrationResult"].toString();
                        //empid=m_temperature.section(':', 1, 1);
                        empid_no = map["RegistrationResult"].toString();;
                        empid_no=empid_no.section(':', 2, 2);
                        qDebug()<<"Emd ID = "<<empid_no;
                        qDebug()<<"Company ID"<<result.section(':', 4, 4);

                       QmlDocument *qml = QmlDocument::create("asset:///second.qml").parent(this);
                         qml->setContextProperty("app", this);   // changed
                       Page *new_Page = qml->createRootObject<Page>();
                       m_pane->push(new_Page);
                              **?????????????????????????????**

            }

ApplicationUI:：ApplicationUI（bb:：cascades:：Application*app）：
QObject（应用程序）
，m_成功（错误）
，m_活动（错误）
{
QmlDocument*qml=QmlDocument:：create（“asset:///main.qml）母公司（本公司）；
qml->setContextProperty（“应用程序”，此）；
//qml->setContextProperty（“第二个”，m_窗格）；
m_root=qml->createRootObject（）；
m_pane=m_root->findChild（“mynavigation”）；//已更改
应用->设置场景（m_根）；
}
void ApplicationUI:：sendRequest（）
{
如果（m_活动）
返回；
m_active=真；
emit activeChanged（）；
m_succeed=假；
QNetworkAccessManager*networkAccessManager=新的QNetworkAccessManager（此）；
QNetworkRequest请求（m_urllink）；
QNetworkReply*reply=networkAccessManager->get（请求）；
bool ok=connect（应答，信号（finished（）），this，插槽（onFinished（））；
Q_断言（ok）；
Q_未使用（正常）；
}
void ApplicationUI:：onFinished（）
{
m_succeed=真；
QNetworkReply*reply=qobject_cast（发送方（））；
QString反应；
如果（回复->属性（QNetworkRequest:：HttpStatusCodeAttribute）.toInt（）==200）
{
JsonDataAccess jda；
QVariantMap=jda.loadFromBuffer（reply->readAll（））.toMap（）；
QVariantList addresses=map[“RegistrationResult”].toList（）；
qDebug（）second.qml应该是一个页面，你能粘贴那个qml吗？我猜你在这个代码执行页面上出错了*new\u Page=qml->createRootObject（）；请检查qml文件..我添加了上面的代码..请帮助解决此问题..我是blackberry的新手..main.qml不是导航窗格，您无法将页面推送到简单的容器中。同时粘贴second.qml我将尝试在此处为uGet设置我的完整应用程序源代码..您会有一些想法..1.我使用Json web服务获得响应2.当我按下一个按钮，当响应成功时，我必须按到新页面，否则必须显示一个祝酒词--已注册3.我将收到“电子邮件id已注册”或“已注册成功”4.当我注册成功时，我只需按一下新页面OK..更改：QmlDocument*qml=QmlDocument:：create（“asset:///second.qml）。母公司（本公司）.property（“app”，this）；Page*new\u Page=qml->createRootObject（）；qml->setContextProperty（“app”，this）；m\u pane->push（new\u Page）；你可以压缩你的项目文件夹并链接我，git repo看起来很大。好的，最终修改。对我来说效果很好：：：删除一行qml->setContextProperty（“app”，this）；最终代码是：("asset:///second.qml）.parent（this）.property（“app”，this）；Page*new_Page=qml->createRootObject（）；m_pane->push（new_Page）；删除了sendRequest（）中的此行-->qml->setContextProperty（“app”，this）；…但应用程序也会关闭
    ApplicationUI::ApplicationUI(bb::cascades::Application *app) :
        QObject(app)
    , m_succeeded(false)
    , m_active(false)
{

    QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);
        qml->setContextProperty("app", this);
        //qml->setContextProperty("second", m_pane);

        m_root = qml->createRootObject<AbstractPane>();

       m_pane = m_root->findChild<NavigationPane*>("mynavigation"); //  changed
        app->setScene(m_root);
}

void ApplicationUI::sendRequest()
{

    if (m_active)
            return;

    m_active = true;
        emit activeChanged();

    m_succeeded = false;


    QNetworkAccessManager* networkAccessManager = new QNetworkAccessManager(this);

    QNetworkRequest request(m_urllink);

    QNetworkReply* reply = networkAccessManager->get(request);

    bool ok = connect(reply, SIGNAL(finished()), this, SLOT(onFinished()));
    Q_ASSERT(ok);
    Q_UNUSED(ok);
}

void ApplicationUI::onFinished()
{

    m_succeeded = true;

    QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());

    QString response;

if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt() == 200)
    {
            JsonDataAccess jda;

            QVariantMap map = jda.loadFromBuffer(reply->readAll()).toMap();

            QVariantList addresses = map["RegistrationResult"].toList();

            qDebug() <<"Full Result is = "<<map["RegistrationResult"].toString();

            QString m_temperature;
            QString result;


            result = map["RegistrationResult"].toString();
            m_temperature=result.section(':', 0, 0);

            m_urlResult = result;
            emit urlResultChanged();
            qDebug()<<m_urlResult;
            qDebug()<<"\n\n\n";
            if(result == "EMAIL ID ALREADY EXISTS")
            {

                        qDebug() << " New Registration Result is " <<m_temperature;
                        qDebug() <<map["RegistrationResult"].toString();

            }

            else if(result != "EMAIL ID ALREADY EXISTS")
            {

                        QString empid;
                        QString empid_no;

                        QString::SectionFlag flag = QString::SectionSkipEmpty;

                        result = map["RegistrationResult"].toString();
                        //empid=m_temperature.section(':', 1, 1);
                        empid_no = map["RegistrationResult"].toString();;
                        empid_no=empid_no.section(':', 2, 2);
                        qDebug()<<"Emd ID = "<<empid_no;
                        qDebug()<<"Company ID"<<result.section(':', 4, 4);

                       QmlDocument *qml = QmlDocument::create("asset:///second.qml").parent(this);
                         qml->setContextProperty("app", this);   // changed
                       Page *new_Page = qml->createRootObject<Page>();
                       m_pane->push(new_Page);
                              **?????????????????????????????**

            }