Qt:QtQuick:DECLARATIVE_EXAMPLE_MAIN

在官方樣本工程裡大多會看到這樣的代碼，沒有main啟動函數

#include "../../shared/shared.h"DECLARATIVE_EXAMPLE_MAIN(demos/stocqt/stocqt)

其實不是，DECLARATIVE_EXAMPLE_MAIN 封裝了啟動過程，看看這個宏定義

#include <QDir>#include <QGuiApplication>#include <QQmlEngine>#include <QQmlFileSelector>#include <QQuickView> //Not using QQmlApplicationEngine because many examples don't have a Window{}#define DECLARATIVE_EXAMPLE_MAIN(NAME) int main(int argc, char* argv[]) \{\    QGuiApplication app(argc,argv);\    app.setOrganizationName("QtProject");\    app.setOrganizationDomain("qt-project.org");\    app.setApplicationName(QFileInfo(app.applicationFilePath()).baseName());\    QQuickView view;\    if (qgetenv("QT_QUICK_CORE_PROFILE").toInt()) {\        QSurfaceFormat f = view.format();\        f.setProfile(QSurfaceFormat::CoreProfile);\        f.setVersion(4, 4);\        view.setFormat(f);\    }\    view.connect(view.engine(), &QQmlEngine::quit, &app, &QCoreApplication::quit);\    new QQmlFileSelector(view.engine(), &view);\    view.setSource(QUrl("qrc:///" #NAME ".qml")); \    if (view.status() == QQuickView::Error)\        return -1;\    view.setResizeMode(QQuickView::SizeRootObjectToView);\    if (QGuiApplication::platformName() == QLatin1String("qnx") || \          QGuiApplication::platformName() == QLatin1String("eglfs")) {\        view.showFullScreen();\    } else {\        view.show();\    }\    return app.exec();\}

可以看到裡面就是一個完整的啟動過程，qrc:///” #NAME “.qml” 這段代碼把demos/stocqt/stocqt組合為 qrc:///qmldemos/stocqt/stocqt.qml