Qt C++发送图片到QML显示

#include <QGuiApplication> #include <QQmlApplicationEngine> #include "showimage.h" #include <QQmlContext> int main(int argc, char *argv[]) { QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling); QGuiApplication app(argc, argv); QQmlApplicationEngine engine; ShowImage *CodeImage = new ShowImage(); engine.rootContext()->setContextProperty("CodeImage",CodeImage); engine.addImageProvider(QLatin1String("CodeImg"), CodeImage->m_pImgProvider); engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); if (engine.rootObjects().isEmpty()) return -1; return app.exec(); }