QtCreator 用纯代码编写应用程序与命令行编译

• 添加空程序
  • 添加C++ source file: main.cpp

  • #include 

    #include 

    #include 

    int main(int argc, char** argv) {

        QApplication app(argc,argv);

        QDialog w;

        QLabel lbl(&w);

        lbl.setText("hello,你好！");

        w.show();

        return app.exec();

    }

• 需要界面的QT程序都必须要在，*.pro文件里面加下面的语句
  • QT += core gui
  • greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
• 避免中文出现乱码

• #include 

  #include 

  #include 

  #include 

  int main(int argc, char** argv) {

      QApplication app(argc,argv);

      QTextCodec::setCodecForLocale(QTextCodec::codecForLocale());

      QDialog w;

      QLabel lbl(&w);

      lbl.setText(QObject::tr("你好！"));

      w.show();

      return app.exec();

  }

  
  

• qmake -project
• qmake
• make