Linux下Qt4开发编程入门-猿码集

1. Introduction

Linux, one of the most popular operating systems, provides a powerful platform for software development. Qt, a popular framework for developing cross-platform applications, offers a comprehensive set of tools and libraries for creating user-friendly graphical interfaces. This article aims to provide beginners with a detailed introduction to Qt4 development on Linux.

2. Installing Qt4 on Linux

2.1 Downloading Qt4

To get started with Qt4 development on Linux, you need to download and install the Qt4 library. Visit the official Qt website and navigate to the downloads section. Choose the Linux version and download the appropriate installer based on your distribution.

Note: It is important to verify the integrity of the downloaded file by comparing its checksum with the one provided on the website.

2.2 Installing Qt4

Once the installer is downloaded, navigate to the directory where the installer is saved and execute the following command:

chmod +x installer_file_name.run ./installer_file_name.run

Follow the on-screen instructions to complete the installation process. Take note of the directory where Qt4 is installed as you will need it later.

3. Creating a Qt4 Application

3.1 Setting Up the Development Environment

Before creating a Qt4 application, ensure that you have a text editor or an integrated development environment (IDE) installed on your Linux machine. Popular choices include Qt Creator, KDevelop, and Eclipse. Open the chosen editor/IDE and set the Qt4 installation directory in the preferences or settings.

3.2 Project Configuration

To create a new Qt4 application, follow these steps:

Create a project directory for your application.

Inside the project directory, create a new file with the extension ".pro" (e.g., myapp.pro).

Edit the .pro file and add the following lines:


TEMPLATE = app
TARGET = myapp
QT += core gui
SOURCES += main.cpp
HEADERS += main.h
FORMS += main.ui

Note: Replace "myapp" with the desired name of your application.

3.3 Writing the Application Code

In the project directory, create the following files:

main.cpp: The main entry point of the application.

main.h: The header file containing the class declaration.

main.ui: The user interface file created using Qt Designer.

Note: For simplicity, a basic "Hello, World!" application will be used as an example.


// main.cpp
#include 
#include 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QLabel label("Hello, World!");
    label.show();
    return app.exec();
}

4. Compiling and Running the Qt4 Application

To compile and run the Qt4 application, open the terminal and navigate to the project directory. Execute the following commands:

qmake make ./myapp

If everything is set up correctly, the application window displaying "Hello, World!" should appear.

5. Conclusion

In this article, we explored the basics of Qt4 development on Linux. We started by installing Qt4, setting up the development environment, and creating a simple Qt4 application. By following these steps, beginners can get started with Qt4 development on Linux. Remember to explore further Qt4 documentation and examples to expand your knowledge and skills.

Linux下Qt4开发编程入门