QT actual combat case (38) -- using qpprocess class to realize the function of starting process

One 、 Project introduction

utilize QProcess Class implements the function of starting a process （ Take the Notepad program as an example ）.

Two 、 Basic configuration of the project

Create a new one Qt Case study , Project name: “ProcessTest”, Base class selection “QWidget”, Click to select Create UI Interface check box , Complete project creation .

3、 ... and 、UI Interface design

UI The interface layout is as follows ：

Only... Is created in the interface 1 Controls , Its name and type are as follows ：

Serial number	name	type	attribute
①	pbn_process	QPushButton	text: Start a process

Four 、 The main program realizes

4.1 widget.h The header file

The header file contains the header file , Then add a private object , Declare button click slot function ：

#include<QProcess>
private:
    QProcess myProcess;
private slots:
    void on_pbn_process_clicked();

4.2 widget.cpp Source file

Define button click slot function ：

void Widget::on_pbn_process_clicked()
{
    
    // Start Notepad process 
    myProcess.start("notepad.exe");
}

Here's the launch of Windows System Notepad program ( namely notepad.exe, Because it is in Windows In the system directory of , The directory has been added to the system PATH In the environment variables , So you don't need to write a specific path ).

5、 ... and 、 Effect demonstration

The complete effect is as follows ：

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