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本例子中记录的是ip和port号。

#ifndef PERFORMANCETESTING_H#define PERFORMANCETESTING_H#include 
   
    #include "ui_performancetesting.h"class PerformanceTesting : public QMainWindow{	Q_OBJECTpublic:	PerformanceTesting(QWidget *parent = 0);	~PerformanceTesting();	private slots:	void PushButton();	void WriteInit(QString key, QString value);	void ReadInit(QString key, QString &value);private:	Ui::PerformanceTestingClass ui;};#endif // PERFORMANCETESTING_H
   

#include "performancetesting.h"#include "handlethreadandtest.h"#include 
   
    #include 
    
     #include 
     
      PerformanceTesting::PerformanceTesting(QWidget *parent)	: QMainWindow(parent){	ui.setupUi(this);	QString readIP;	QString readPort;	ReadInit("IP", readIP);	ReadInit("PORT", readPort);	ui.serverIP->setText(readIP);	ui.serverPort->setText(readPort);}PerformanceTesting::~PerformanceTesting(){}void PerformanceTesting::PushButton(){	if (ui.serverIP->text() == "" || ui.serverPort->text() == "")	{		QMessageBox::information(this, "Warning", "IP and port number can not be empty!", QMessageBox::Ok);		return;	}	WriteInit("IP", ui.serverIP->text());	WriteInit("PORT", ui.serverPort->text());	QString ip = ui.serverIP->text();	int port = ui.serverPort->text().toInt();	int meetingRoomNum = ui.meetingRoomNum->text().toInt();	int peopleNum = ui.peopleNum->text().toInt();	HandleThreadAndTest *threadAndTest = new HandleThreadAndTest();	threadAndTest->SetIP(ip);	threadAndTest->SetPort(port);	threadAndTest->SetMeetingRoomNum(meetingRoomNum);	threadAndTest->SetPeopleNum(peopleNum);	this->close();	threadAndTest->show();}void PerformanceTesting::WriteInit(QString key, QString value){	QString path = "ip.ini";	//创建配置文件操作对象	QSettings *config = new QSettings(path, QSettings::IniFormat);	//将信息写入配置文件	config->beginGroup("config");	config->setValue(key, value);	config->endGroup();	delete config;}void PerformanceTesting::ReadInit(QString key, QString &value){	value = QString("");	QString path = "ip.ini";	//创建配置文件操作对象	QSettings *config = new QSettings(path, QSettings::IniFormat);	//读取配置信息	value = config->value(QString("config/") + key).toString();	delete config;}
     
    
   

第二次运行时，就会填入第一次输入的ip和port。

//参考：http://blog.sina.com.cn/s/blog_a6fb6cc90101bz3c.htmlbool Util::writeInit(QString path, QString user_key, QString user_value){	if (path.isEmpty() || user_key.isEmpty())	{		return false;	}	else	{		//创建配置文件操作对象		QSettings *config = new QSettings(path, QSettings::IniFormat);		//将信息写入配置文件		config->beginGroup("config");		config->setValue(user_key, user_value);		config->endGroup();		return true;	}}bool Util::readInit(QString path, QString user_key, QString &user_value){	user_value = QString("");	if (path.isEmpty() || user_key.isEmpty())	{		return false;	}	else	{		//创建配置文件操作对象		QSettings *config = new QSettings(path, QSettings::IniFormat);		//读取用户配置信息		user_value = config->value(QString("config/") + user_key).toString();		return true;	}}//获取界面用户输入的配置内容QString address = address_line_edit->text();  //地址QString port = port_line_edit->text();  //端口向user.ini配置文件中写入地址、端口bool is_address = Util::writeInit(QString("./user.ini"), ADDRESS, address);bool is_port = Util::writeInit(QString("./user.ini"), PORT, port);从user.ini配置文件中读取地址、端口QString address_value;QString port_value;bool is_address = Util::readInit(QString("./user.ini"), ADDRESS, address_value);bool is_port = Util::readInit(QString("./user.ini"), PORT, port_value);