Qt的QCoreApplication类提供一些软件版本信息的静态公共接口,如下所示。 1 //设置相关信息 2 QCoreApplication::setApplicationName("APPNAME"); 3 QCoreApplication::setApplicationVersion("1.0.0.0"); 4 QCoreApplication::setOrganizationName("Qt"); 5 QCoreApplication::setOrganizationDomain("www.qt.com")...
api含义:QCoreApplication::processEvents() 将处理所有事件队列中的事件并返回给调用者。 问题描述: 当主线程在某个槽函数里正在执行processEvents时, 刚好有一个能响应此槽函数的信号发送过来了(肯定是其他线程发的信号), 这时就可能会发生可怕的递归, 导致栈溢出崩溃。 原因是processEvents,进入到无尽的递归中。
QCoreApplication对象能够通过instance()来获取。您可以通过sendEvent()来发送事件,以及通过postEvent()来投送事件。待处理的事件能通过removePostedEvents()来移除,亦可通过sendPostedEvents()来派发。此类提供了一个槽函数quit()及一个信号aboutToQuit()。程序和库路径一个应用程序有一个applicationDirPath()和一个...
QCoreApplication a(argc, argv); // 读取文件 QString config = readonly_string("d:/config.json"); if(config == "None") { return 0; } // 字符串格式化为JSON QJsonParseError err_rpt; QJsonDocument root_document = QJsonDocument::fromJson(config.toUtf8(), &err_rpt); if(err_rpt.er...
&app, [url](QObject *obj, const QUrl &objUrl) { if (!obj && url == objUrl) QCoreApplication::exit(-1); }, Qt::QueuedConnection); engine.load(url); return app.exec(); } 5.注册C++类:在main.cpp中,使用qmlRegisterType函数注册你的C++类,使其可以在QML中使用。例如: ...
#include<QCoreApplication>#include<iostream>#include<QThread>#include<QMutex>staticQMutex g_mutex;// 线程锁staticQString g_store;// 定义全局变量class Producer:public QThread{protected:voidrun(){intcount=0;while(true){// 加锁g_mutex.lock();g_store.append(QString::number((count++)%10))...
@@ -2921,10 +2921,11 @@ void QCoreApplication::requestPermission(const QPermission &requestedPermission, PermissionReceiver *receiver = new PermissionReceiver(std::move(slotObj), context); QPermissions::Private::requestPermission(requestedPermission, [=](Qt::PermissionStatus status) { Q_ASSERT_X(...
needs it) your safe without the QCoreApplication object. However TT recommends to use a QCoreApplication, thus as long as you don't want to utilize another event-loop (from another lib) you should either already know that you don't need it or better use a ...
都会进入init_qt_cef,但渲染进程会在里面阻塞,+// 不会进入后续的QT应用初始化constint result=init_qt_cef(argc,argv);if(result>=0){returnresult;}+QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);// 解决高DPI下,界面比例问题+QApplicationa(argc,argv);+QtCefWindow w;w.show();a....
#include <QSharedMemory>#include <QDebug>#include <cstring>int main(int argc, char *argv[]){QCoreApplication a(argc, argv);QSharedMemory sharedMemory("MySharedMemory");if (!sharedMemory.create(1024)) {qDebug() << "Unable to create shared memory segment.";return 1;}sharedMemory.lock();...