zoukankan      html  css  js  c++  java
  • [置顶] 关于Qt的学习

    初学习QT,希望用此来记录学习的轨迹.......

    1、Qt版本为Qt5.1.0

    2、使用Qt-Creator进行变成。

    3、第一个例子 打印出“Hello World”

    3.1  打开Qt-Creator

    3.2 点击新建->弹出新建对话框,项目选择为:应用程序->Qt 控制台应用。

    3.3 选择项目要保存的路径。

    3.4 选择构建套件,此处主要是对Qt程序编译器的选择。

    3.5 点击完成。

    #include <QCoreApplication>

    #include<QDebug>
    
    
    intmain(intargc,char*argv[])
    {
    QCoreApplicationa(argc,argv);
    
    
    qDebug() << "Hello World";
    
    
    returna.exec();
    }
     
    以上标红为输入的代码。
     
    对于以上代码进行解析:
    1、 #include<QCoreApplication>

    The QCoreApplication class provides an event loop for console Qt applications.

    This class is used by non-GUI applications to provide their event loop. For non-GUI application that uses Qt, there should be exactly one QCoreApplication object. For GUI applications, see QApplication.

    QCoreApplication contains the main event loop, where all events from the operating system (e.g., timer and network events) and other sources are processed and dispatched. It also handles the application's initialization and finalization, as well as system-wide and application-wide settings.

    2、#include<QDebugg>

    The QDebug class provides an output stream for debugging information.

    QDebug is used whenever the developer needs to write out debugging or tracing information to a device, file, string or console.

    In the common case, it is useful to call the qDebug() function to obtain a default QDebug object to use for writing debugging information。

  • 相关阅读:
    基础语法;
    layabox里面的ui组件之RadioGroup
    github删除带有文件的文件夹
    【转】NHibernate:no persister for 异常
    MVC乱码可能的原因
    【转】局域网内访问VS2012 调试的IIS Express web服务器
    Hightchart y轴不允许显示小数
    WCF 断点不会命中
    Web Form 取消手机端自动转换
    Sharepoint的javascript客户端对象模型获取其他站点的list
  • 原文地址:https://www.cnblogs.com/suncoolcat/p/3283483.html
Copyright © 2011-2022 走看看