перейти к странице после разбора в BB 10

Question

Я пытаюсь перейти на страницу после разбора, но прежде чем я получил ответ от сервера, метод getLoginData() вызывается из Qml-файла и получает значение false, потому что во время вызова этой функции ответ не получается из сервер, когда я снова нажимаю кнопку, где эта функция вызывает вызов, я получил точный результат, потому что на этот раз я уже получил результат. поэтому, пожалуйста, помогите мне решить это .......

My code... 

[B]main.qml[/B] 

    enter code here 

// Navigation pane project template 
import bb.cascades 1.0 
import bb.system 1.0 

NavigationPane { 
    id: navigationPane 
    objectName: "navigationPaneQml" 
    Page { 
     id: loginPage 
     objectName : "pageQml" 
     Container { 
      id: container1 
      background: Color.Green 
      leftPadding: 10 
      rightPadding: 10 
      topPadding: 10 
      layout: StackLayout { 
       orientation:LayoutOrientation.TopToBottom  
      } 
      TextField { 
       id: usernameBox 
       objectName: "textFieldRetrived" 
       hintText: "Enter Your Mobile Number" 
       topPadding: 10 
       inputMode: TextFieldInputMode.PhoneNumber 
       preferredWidth: maxWidth 
       input { 
        flags: TextInputFlag.PredictionOff | 
TextInputFlag.AutoCorrectionOff 
       } 
       //    validator: IntValidator { 
       //     bottom: 0 
       //     top: 9999999999 
       //    } 
       validator: Validator { 
        mode: ValidationMode.Immediate 
        errorMessage: "Your username must be 10 characters." 
        onValidate: { 
         if (usernameBox.text.length < 10 || usernameBox.text.length > 10) state = ValidationState.Invalid; 
         else state = ValidationState.Valid; 
        } 
       } 

       //    validator: RegExpValidator { 
       //     mode: ValidationMode.Immediate 
       //     regExp: /\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/ 
       //     onValidate: { 
       //      if (usernameBox.text.length <= 10) state = ValidationState.Valid; 
       //      else state = ValidationState.Invalid; 
       //     } 
       //    } 

      } 
      Button { 
       id: submitButton 
       objectName : submitButtonQml 
       horizontalAlignment: HorizontalAlignment.Center 
       //    verticalAlignment: VerticalAlignment.Center 
       text: qsTr("Submit") 
       preferredWidth: minWidth 
       //    imageSource: "asset:///images/picture1thumb.png" 

       attachedObjects: [ 
        SystemToast { 
         id: invalidUsername 
         body: "Invalid Username" 
         onFinished: { 
          //        Application.quit(); 
         } 
        }, 
        SystemToast { 
         id: networkNotAvalable 
         body: "Network not Avalable" 
         onFinished: { 
          //        Application.quit(); 
         } 
        }, 
        SystemToast { 
         id: invalidToast 
         body: "Not a valid input" 
         onFinished: { 
          //        Application.quit(); 
         } 
        }, 
        ComponentDefinition { 
         id: pageDefinition 
         source: "splash.qml" 
        } 
       ] 
       onClicked: { 
        if(usernameBox.text!= null && usernameBox.text!=""){ 
         if(app.isNetworkAvailable()){ 
          app.initiateRequest(usernameBox.text) 

          if (app.getLoginData() == "True"){ 
           var newPage = pageDefinition.createObject(); 
           navigationPane.push(newPage); 
          }else{ 
           invalidUsername.show() 
          } 
         }else { 
          networkNotAvalable.show() 
         } 
        }else{ 
         invalidToast.show() 
        } 

       } 
      } 
      TextArea { 
       id: chat 
       objectName: "textArea" 
       inputMode: TextAreaInputMode.Default 
      } 

      Container { 
       id: cntrUpdates 
       horizontalAlignment: HorizontalAlignment.Center 
       //      verticalAlignment: VerticalAlignment.Top 
       layout: StackLayout { 
        orientation: LayoutOrientation.LeftToRight 
       } 
       preferredWidth: 1280.0 
       leftPadding: 90.0 
       topPadding: 20.0 
       Label { 
        objectName: "lblRetrieve" 
        text: "Retrieving contact list ..." 
        textStyle.textAlign: TextAlign.Right 
        verticalAlignment: VerticalAlignment.Center 
       } 
       // The activity indicator has an object name set so that 
       // we can start and stop it from C++ code. 
       ActivityIndicator { 
        objectName: "indicator" 
        running: false 
       } 
      } 
     } 

    } 
    onCreationCompleted: { 
     // this slot is called when declarative scene is created 
     // write post creation initialization here 
     console.log("NavigationPane - onCreationCompleted()"); 

     // enable layout to adapt to the device rotation 
     // don't forget to enable screen rotation in bar-bescriptor.xml (Application->Orientation->Auto-orient) 
     OrientationSupport.supportedDisplayOrientation = SupportedDisplayOrientation.All; 
    } 
} 


[B]DemoProject2.cpp[/B] 

// Navigation pane project template 
#include "DemoProject2.hpp" 

#include <bb/cascades/Application> 
#include <bb/cascades/QmlDocument> 
#include <bb/cascades/AbstractPane> 

#include <QIODevice> 

#include <bb/cascades/XmlDataModel> 
#include <bb/cascades/Color> 

#include <bps/bps.h> 
#include <bps/netstatus.h> 
#include <bps/locale.h> 

#include <QXmlStreamReader> 

#include <QFile> 
#include <QDir> 
#include <QDebug> 
#include <iostream> 
#include <QtCore/QCoreApplication> 
#include <QTextStream> 
#include <QDomDocument> 
#include <QDomNodeList> 
#include <QtXml/qxml.h> 
#include <QString> 
#include <bb/cascades/ValidationMode> 
#include <bb/cascades/Validator> 
#include <bb/system/SystemToast> 
#include <bb/system/SystemUiPosition> 
#include <QtCore/QDebug> 

using namespace bb::cascades; 
using namespace bb::system; 

DemoProject2::DemoProject2(bb::cascades::Application *app) 
: QObject(app) 
{ 
    // create scene document from main.qml asset 
    // set parent to created document to ensure it exists for the whole application lifetime 
    QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this); 

    // Expose this class to QML so that we can call it's functions from C++ code. 
    qml->setContextProperty("app", this); 

    // create root object for the UI 
    AbstractPane *root = qml->createRootObject<AbstractPane>(); 
    // set created root object as a scene 




    // Retrieve the activity indicator from QML so that we can start 
    // and stop it from C++ code. 
    myActivityIndicator = root->findChild<ActivityIndicator*>("indicator"); 
    myTextField = root->findChild<TextField*>("textFieldRetrived"); 
    myLabel = root->findChild<Label*>("lblRetrieve"); 
    textArea = root->findChild<TextArea*>("textArea"); 
    submitButton = root->findChild<Button*>("submitButtonQml"); 
// navigationPane = root->findChild<NavigationPane*>("navigationPaneQml"); 
// root = qml->createRootObject<NavigationPane>(); 

// QmlDocument *qml1 = QmlDocument::create("asset:///splash.qml").parent(this); 
//// mNewPage = new Page(); 
// mNewPage = qml1->createRootObject<Page>(); 

    myNetworkAccessManager = new QNetworkAccessManager(this); 
    connect(myNetworkAccessManager, SIGNAL(finished(QNetworkReply*)), 
      this, SLOT(requestFinished(QNetworkReply*))); 

    // Create a file in the file system that we can use to save the data model. 
    myFile = new QFile("data/model.xml"); 

    app->setScene(root); 
} 

bool DemoProject2::isNetworkAvailable() { 
    QNetworkConfigurationManager netMgr; 
    QList<QNetworkConfiguration> mNetList = netMgr.allConfigurations(
      QNetworkConfiguration::Active); 
    if (mNetList.count() > 0) { 
     if (netMgr.isOnline()) { 
      return true; 
     } else { 
      return false; 
     } 
    } else { 
     return false; 
    } 
} 

void DemoProject2::initiateRequest(QString text){ 
    text.trimmed(); 
    fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","hhhh"); 
    isComplete = false; 

    // Start the activity indicator. 
     myActivityIndicator->start(); 
     myLabel->setVisible(true); 
     myLabel->setText("Retrieving contact list ..."); 

     // Create and send the network request. 
     QNetworkRequest request = QNetworkRequest(); 
      request.setUrl(QUrl("******************")); 

     fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","00"); 
     myNetworkAccessManager->get(request); 
} 

void DemoProject2::requestFinished(QNetworkReply* reply){ 
    fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","NUM 0"); 

    myActivityIndicator->stop(); 
    myLabel->setVisible(false); 

    // Check the network reply for errors. 
    if (reply->error() == QNetworkReply::NoError){ 
     fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","NUM 1"); 

     /****** Sax Parsing code Section..................******/ 
       QByteArray data = reply->readAll(); 
       xmlSaxParser(data); 

     /****** dom parsing code section ........******/ 
//  QByteArray byteArray = reply->readAll(); 
//  xmlDomParser(byteArray); 

     fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","NUM 2"); 

     reply->deleteLater(); 

    } 
} 

bool DemoProject2:: getCompleteVariable(){ 

    return isComplete; 
} 


void DemoProject2 :: setLoginData(QString data){ 
    loginData = data; 
} 

QString DemoProject2 :: getLoginData(){ 

    while(!getCompleteVariable()){ 

     fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","shivang"); 
    } 

    return loginData; 
} 

void DemoProject2:: xmlSaxParser(QByteArray data){ 
    fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","NUM 3"); 

    // The XML stream reader that is used to extract the articles from the RSS feed 
    QXmlStreamReader m_xml; 
    m_xml.addData(data); 
    QString currentTag = ""; 
    QString linkString; 
    QString titleString; 

    while (!m_xml.atEnd()) 
    { 
     m_xml.readNext(); 
     if (m_xml.isStartElement()) 
     { 
      if (m_xml.name() == "contacts"){ 
       linkString = m_xml.attributes().value("title").toString(); 
       currentTag = m_xml.name().toString(); 
       myLabel->setVisible(true); 
       myLabel->setText(linkString); 
      }else if(m_xml.name() == "return"){ 
       currentTag = m_xml.name().toString(); 
       fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","ns:return"); 
      } 
     } 
     else if (m_xml.isEndElement()) 
     { 
      if (m_xml.name() == "return") 
      { 
       fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","return"); 
       //    linkString = m_xml.attributes().value("rss:about").toString(); 
             titleString.clear(); 
       //      linkString.clear(); 
      } 

     } else if (m_xml.isCharacters() && !m_xml.isWhitespace()) 
     { 
      if (currentTag == "return"){ 
       titleString += m_xml.text().toString(); 
            myLabel->setVisible(true); 
                 myLabel->setText(titleString); 
                 setLoginData(titleString); 
//    textArea->setText(titleString); 
//    currentTag = ""; 
      } 
     } 

    } 

    if (m_xml.error() && m_xml.error() != QXmlStreamReader::PrematureEndOfDocumentError) { 
     //    m_feeds.append(
     //      QString::fromLatin1("XML ERROR: %1: %2").arg(m_xml.lineNumber()).arg(m_xml.errorString())); 
    } 

    fprintf(stderr, "Debug::::::::::::::::::::::::::: %s\n","NUM 4"); 

// navigationPane->push(mNewPage); 
    isComplete = true; 
} 



[B]DemoProject2.hpp[/B] 

// Navigation pane project template 
#ifndef DemoProject2_HPP_ 
#define DemoProject2_HPP_ 

#include <QObject> 

#include <QFile> 

#include <QString> 
#include <bb/cascades/ActivityIndicator> 
#include <bb/cascades/TextField> 
#include <bb/AbstractBpsEventHandler> 

#include <bb/cascades/Application> 
#include <bb/cascades/Label> 
#include <bb/cascades/TextArea> 
#include <bb/cascades/Button> 
#include <bb/cascades/NavigationPane> 
#include <bb/cascades/Page> 
using namespace bb::cascades; 

namespace bb { namespace cascades { class Application; }} 

/*! 
* @brief Application pane object 
* 
*Use this object to create and init app UI, to create context objects, to register the new meta types etc. 
*/ 
class DemoProject2 : public QObject 
{ 
    Q_OBJECT 
public: 
    DemoProject2(bb::cascades::Application *app); 
    virtual ~DemoProject2() {} 

// void parseXml (QByteArray data); 

    Q_INVOKABLE void initiateRequest(QString text); 
    Q_INVOKABLE bool isNetworkAvailable(); 

    Q_INVOKABLE void xmlSaxParser(QByteArray data); 

    Q_INVOKABLE void xmlDomParser(QByteArray data); 
    Q_INVOKABLE QString getLoginData(); 
    Q_INVOKABLE void setLoginData(QString data); 
    Q_INVOKABLE bool getCompleteVariable(); 

// NavigationPane *root; 
// signals: 
//  void networkStatusUpdated(bool status, QString type); 

    private slots: 
     void requestFinished(QNetworkReply* reply); 
//  void networkStatusUpdateHandler(bool status, QString type); 

private: 
    bb::cascades::TextField *myTextField; 
    bb::cascades::ActivityIndicator *myActivityIndicator; 
    bb::cascades::Label *myLabel; 
    bb::cascades::TextArea *textArea; 
    bb::cascades::Button *submitButton; 
// bb::cascades::NavigationPane* navigationPane; 
// bb::cascades:: Page* mNewPage; 

    QNetworkAccessManager *myNetworkAccessManager; 
     QFile *myFile; 
     QString loginData; 
     QByteArray data; 
     bool isComplete; 
//  Page* mNewPage; 


//  StatusEvent *statusEvent; 
}; 

#endif /* DemoProject2_HPP_ */ 

Answer 1

петля использование событие ....

QNetworkAccessManager* netManager = new QNetworkAccessManager(); 
    QUrl myurl("http://******"); 
    QNetworkRequest req(myurl); 

QNetworkReply* ipReply = netManager->get(req); 

QEventLoop eventLoop; 
QObject::connect(ipReply, SIGNAL(finished()), &eventLoop, SLOT(quit())); 
eventLoop.exec(); 
std::cout << "finished" << std::endl; //request finished here 
requestFinished(ipReply);