This seems an old topic. If you ever learned C programming language, you must know the search rules for the header files. The search rules of gcc for headers are […]

qt .pro.user file illustrated

When you open the .pro file of a Qt project at the first time, you will be prompted to configure the project. The “Configure Project” dialog shows you the available […]

The usual way to use QNetworkAccessManager and QNetworkReply is: QNetworkAccessManager nam; voif fun() { QNetworkRequest request; request.setUrl(QUrl(“https://myprogrammingnotes.com”)); connect(&nam,SIGNAL(finished(QNetworkReply*)),this,SLOT(replyFinished(QNetworkReply*))); QNetworkReply *reply=nam.get(request); } void replyFinished(QNetworkReply* reply) { reply->readAll(); } According to https://doc.qt.io/qt-5/qnetworkaccessmanager.html, you […]

Why need to define macros in Qt project file? I have a tool source library. The library contains several header files and source files. I used conditional compilation in both […]

The TAB character literal can be written as ‘\t’ or ‘    ‘ in your C/C++ source code. They represent the same character. Character literals are enclosed in single quotes […]

Only after you read my post about how Qt Creator interacts with GDB and what Qt pretty printers are, can you have some basic background knowledge about how to write […]

Occasionally, we need to convert a number that represents the code point of a character to a QString or QChar. You may want to use the following constructor of QString: […]