上面第一个不常用打开函数可以打开标准输入流 stdin、标准输出流 stdout、标准错误流 stderr ,或者其他文件句柄(Windows系统中参数里的 fh 句柄必须以二进制模式打开,打开句柄时要带 'b' 模式)。最后的参数 handleFlags 一般就用不关闭的 DontCloseHandle 就可以了,如果希望 QFile 对象析构时自动关闭文件或流,那么...
= 67#error "This file was generated using the moc from 5.15.2. It"#error "cannot be used with the include files from this version of Qt."#error "(The moc has changed too much.)"#endifQT_BEGIN_MOC_NAMESPACEQT_WARNING_PUSHQT_WARNING_DISABLE_DEPRECATEDstruct qt_meta_stringdata_XTest_...
QByteArray QIODevice::readAll() Reads all remaining data from the device, and returns it as a byte array. This function has no way of reporting errors; returning an empty QByteArray can mean either that no data was currently available for reading, or that an error occurred. int QDataStream...
#ifdefQS_HAS_JSON /*! \brief Convert QJsonValue in QJsonDocument as QByteArray. */ staticQByteArraytoByteArray(constQJsonValue & value){ returnQJsonDocument(value.toObject()).toJson(); } #endif #ifdefQS_HAS_XML /*! \brief Convert QDomNode in QDomDocument as QByteArray. */ staticQByt...
(!context->makeCurrent(q)) qWarning("QOpenGLWindow::beginPaint: Failed to make context current"); paintDevice.reset(new QOpenGLWindowPaintDevice(q)); if (updateBehavior == QOpenGLWindow::PartialUpdateBlit) hasFboBlit = QOpenGLFramebufferObject::hasOpenGLFramebufferBlit(); q->initializeGL(); ...
==0) rc = SOCKET_ERROR;/* The return value from recv is 0 when the peer has performed...
virtual void close() = 0; virtual bool push(AVFrame *frame) = 0; }; classScreenSink:public FrameSink { Q_OBJECT public: explicit ScreenSink(QObject *parent = nullptr); ~ScreenSink(); virtual bool open(AVCodecContext *ctx); virtual void close(); ...
由于gcc版本过高,之前编译qt5.12源码时,需要在几个文件里手动加#include <limts>,否则有几个std::报错。而qt5.15就没这个问题。但是,尝试加openssl时,报错了,最后看config.log才发现,qt5.15支持的openssl版本是1.1.1,而sdk带的是1.1.0。sdk默认make menuconfig里openssl基本没勾选子项目,需要勾选一些。 最近编辑...
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