Qt读写注册表和ini文件

Qt刚上手，用起来有点感觉功能很强大，但是资料太少。

刚才上网查Qt怎么操作注册表，可网上几乎找不到什么东西。就去查Qt文档，摸索了一会儿，总算摸索出来了。相当简单。竟比Delphi还简单，比起VC就更不用提了。需要#include <QSettings>

    只举几个简单的例子：

1、用QSettings写注册表

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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;

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

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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;

还可以toInt(),toString()等。

3、用QSettings写ini文件:

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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读ini文件:

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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;

  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。

  在文档中的QSettings Class Reference部分讲的很清楚，在这里我就不多说了。也该睡觉了～