Qt读写注册表和ini文件

1、用QSettings写注册表

QSettings *reg = new QSettings("HKEY_CURRENT_USER//Software//yinhaifan",

QSettings::NativeFormat);

reg->setValue("registered",true);

delete reg;

QSettings *reg = new QSettings("HKEY_CURRENT_USER//Software//yinhaifan", QSettings::NativeFormat); reg->setValue("registered",true); delete reg;
当然reg->setValue还可以写入字符串，整型之类的数据。
比如reg->setValue("registered","yes");
2、用QString读注册表

QSettings *reg = new QSettings("HKEY_CURRENT_USER//Software//yinhaifan",

QSettings::NativeFormat);

if (reg->value("registered",false).toBool())

{

QMessageBox::information(NULL,"information","registered");

}

delete reg;

QSettings *reg = new QSettings("HKEY_CURRENT_USER//Software//yinhaifan", QSettings::NativeFormat); if (reg->value("registered",false).toBool()) { QMessageBox::information(NULL,"information","registered"); } delete reg;
还可以toInt(),toString()等。
3、用QSettings写ini文件:

QSettings *ConfigIni = new QSettings("D://a.ini",QSettings::IniFormat,0);

ConfigIni->setValue("/config/node1",ui->lineEdit->text());

delete ConfigIni;

QSettings *ConfigIni = new QSettings("D://a.ini",QSettings::IniFormat,0); ConfigIni->setValue("/config/node1",ui->lineEdit->text()); delete ConfigIni;
4、用QSettings读ini文件:

QSettings *ConfigIni = new QSettings("D://a.ini",QSettings::IniFormat,0);

ui->lineEdit_2->setText(ConfigIni->value("/config/node1","20").toString());

delete ConfigIni;

QSettings *ConfigIni = new QSettings("D://a.ini",QSettings::IniFormat,0); ui->lineEdit_2->setText(ConfigIni->value("/config/node1","20").toString()); delete ConfigIni;
这几段代码都是我在Qt Creator里面写的，所以用ui->lineEdit*->text()和ui->lineEdit*->setText()做输入和输出了。