轉自：http://blog.ednchina.com/frenkie/257019/message.aspx

?

需要#include <QSettings>

??? 只舉幾個簡單的例子：

1、用QSettings寫注冊表

?? 1. QSettings *reg = new QSettings("HKEY_CURRENT_USER//Software//yinhaifan",?
?? 2.????????????????????? QSettings::NativeFormat);?
?? 3.????? reg->setValue("registered",true);?
?? 4.???? delete reg;?

QSettings *reg = new QSettings("HKEY_CURRENT_USER//Software//yinhaifan", QSettings::NativeFormat); reg->setValue("registered",true); delete reg;

當然reg->setValue還可以寫入字符串，整型之類的數據。

比如reg->setValue("registered","yes");

2、用QString讀注冊表

?? 1. QSettings *reg = new QSettings("HKEY_CURRENT_USER//Software//yinhaifan",?
?? 2.????????????????? QSettings::NativeFormat);?
?? 3. if (reg->value("registered",false).toBool())?
?? 4. {?
?? 5.????? QMessageBox::information(NULL,"information","registered");?
?? 6. }?
?? 7. 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;

還可以toInt(),toString()等。

3、用QSettings寫ini文件:

?? 1. QSettings *ConfigIni = new QSettings("D://a.ini",QSettings::IniFormat,0);?
?? 2. ConfigIni->setValue("/config/node1",ui->lineEdit->text());?
?? 3. delete ConfigIni;?

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

4、用QSettings讀ini文件:

?? 1. QSettings *ConfigIni = new QSettings("D://a.ini",QSettings::IniFormat,0);?
?? 2. ui->lineEdit_2->setText(ConfigIni->value("/config/node1","20").toString());?
?? 3. delete ConfigIni;?

QSettings *ConfigIni = new QSettings("D://a.ini",QSettings::IniFormat,0); ui->lineEdit_2->setText(ConfigIni->value("/config/node1","20").toString()); delete ConfigIni;

?? 這幾段代碼都是在Qt Creator里面寫的，所以用ui->lineEdit*->text()和ui->lineEdit*->setText()做輸入和輸出了。

?? 在文檔中的QSettings Class Reference部分講的很清楚

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