QT：QSettings的简单应用

class CLastPath : public QObject
{
	Q_OBJECT
public:
	CLastPath(QObject *parent = 0);
	~CLastPath(void);
	QString GetLastPath(QString Key);
	void SetLastPath(QString Key, QString Path);


private:
	QSettings		*m_Settings;
};

CLastPath::CLastPath(QObject *parent)
:QObject(parent)
,m_Settings(NULL)
{
	std::string IniPath = CFilePath::Instance().GetIniPath();
	QString FilePath = QString::fromStdString(IniPath) + "Setting.ini";
	m_Settings = new QSettings(FilePath, QSettings::IniFormat);
}

CLastPath::~CLastPath(void)
{
	
}

QString CLastPath::GetLastPath(QString Key)
{
	return m_Settings->value(Key).toString();
}

void CLastPath::SetLastPath(QString Key, QString Path)
{
	int i = Path.lastIndexOf('/');
	QString FilePath = Path.left(i);
	QVariant VarPath(FilePath);
	m_Settings->setValue(Key, VarPath);
}

QString PngName = this->getSavePngName();

CLastPath LastPath;
QString PngPath = LastPath.GetLastPath("LastSavePngPath");
QString Name = PngPath + "\\" + PngName;

QString fileName = QFileDialog::getSaveFileName(this,  QString::fromLocal8Bit("选择保存路径"), Name, tr("PNG(*.png);;JPG(*.jpg)"));
if (!fileName.isEmpty())
{
    pixmap.save(fileName);

    LastPath.SetLastPath("LastSavePngPath", fileName);
}

该QSettings将路径保存在一个ini文件中：