无法使用<QJsonValue> <QJsonObject>

Question

我在使用QJsonValue和QJsonObject时遇到问题

即使我添加了QT+=core。我使用的是Qt5.5，有人知道问题出在哪里吗？提前感谢

Answer 1

Pro file:     

QT  += core gui webkit network
TEMPLATE = app
SOURCES += main.cpp \
apiservis.cpp
HEADERS += \
apiservis.h
QT = core
QT -= gui
QT += webkit
QT += webkit webkitwidgets
QT += network
TARGET = cpp
CONFIG += console
CONFIG -= app_bundle
TARGET = main
DISTFILES += \
API_kljuc.txt   

And in the .h file I have:  
#include <QCoreApplication>
#include <iostream>
#include <cmath>
#include <iomanip>
#include <vector>
#include <string.h>
#include <locale>
#include <sstream>
#include <fstream>
#include <string>
#include <curl/curl.h>
#include <stdio.h>
#include <QHash>
#include <QVariantMap>
#include <QWebFrame>
#include <QWebView>
#include <QNetworkReply>
#include <QCoreApplication>
#include <QDebug>
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QUrl>
#include <QObject>
#include <QJsonArray>
#include <QJsonValue>
#include <QJsonObject>

But when I try to build it, error is: QJsonARRay:No such file or directory.