QT reading and writing INI file

One background

1 ini The file is introduced

.ini File is Initialization File Abbreviation , Initialization file .

except windows Now many applications under other operating systems also have .ini file , It is used to configure application software to meet the requirements of different users . You don't have to edit these directly .ini file , The graphical interface of the application program can be operated to achieve the same function . It can be used to store software information , Registration information, etc .

2 ini File format

INI Document by section 、 key 、 The value of .

section

[section]

Parameters （ key = value ）

name=value

Here's a ini Examples of documents

[Section1 Name]

KeyName1=value1

KeyName2=value2

...

[Section2 Name]

KeyName21=value21

KeyName22=value22

among ：[Section1 Name] Used to represent a paragraph . because INI The file may be shared in the project , So use [Section Name] Section name to distinguish parameter areas for different purposes . for example ：[Section1 Name] Indicates the sensitivity parameter area of the sensor ;[Section2 Name] Indicates the measurement channel parameter area, etc .

annotation ： Use a semicolon to indicate （;）. The text after the semicolon , It's all annotations until the end of the line .

Two Qt Write ini file

#include <QtCore/QCoreApplication>
#include <QSettings>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
//Qt Use in QSettings Class reading and writing ini file
//QSettings The first argument to the constructor is ini Path to file , The second parameter is for ini file , The third parameter can default to
QSettings *configIniWrite = new QSettings("hahaya.ini", QSettings::IniFormat);
// towards ini Write in the file ,setValue The two arguments to the function are key value pairs
// towards ini The first section of the file writes ,ip The first parameter under section
configIniWrite->setValue("/ip/first", "192.168.0.1");
// towards ini The first section of the file writes ,ip The second parameter under section
configIniWrite->setValue("ip/second", "127.0.0.1");
// towards ini The second section of the file writes ,port The first parameter under section
configIniWrite->setValue("port/open", "2222");
// Delete the pointer when the write is complete
delete configIniWrite;
return a.exec();
}

After running the program , Open the program directory hahaya.ini file , The results are shown in the following figure ：

3、 ... and Qt read ini file

#include <QtCore/QCoreApplication>
#include <QSettings>
#include <QString>
#include <QDebug>
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QSettings *configIniRead = new QSettings("hahaya.ini", QSettings::IniFormat);
// Will read to ini The file is kept in QString in , Take value first , And then through toString() Function to QString type
QString ipResult = configIniRead->value("/ip/second").toString();
QString portResult = configIniRead->value("/port/open").toString();
// Print the results
qDebug() << ipResult;
qDebug() << portResult;
// Delete the pointer when the read is complete
delete configIniRead;
return a.exec();
}

Screenshot of program operation ：

from ：https://blog.csdn.net/qiurisuixiang/article/details/7760828

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