QSqlDriverPlugin 類

The QSqlDriverPlugin class provides an abstract base for custom QSqlDriver 插件。更多...

頭：	#include <QSqlDriverPlugin>
繼承：	QObject

所有成員列錶，包括繼承成員

公共函數

	QSqlDriverPlugin (QObject * parent = 0)
	~QSqlDriverPlugin ()

重實現公共函數

virtual QSqlDriver *	create (const QString & key ) = 0
virtual QStringList	keys () const = 0

29 公共函數繼承自 QObject

額外繼承成員

1 特性繼承自 QObject
1 公共槽繼承自 QObject
1 信號繼承自 QObject
7 靜態公共成員繼承自 QObject
8 保護函數繼承自 QObject

詳細描述

The QSqlDriverPlugin class provides an abstract base for custom QSqlDriver 插件。

The SQL driver plugin is a simple plugin interface that makes it easy to create your own SQL driver plugins that can be loaded dynamically by Qt.

Writing a SQL plugin is achieved by subclassing this base class, reimplementing the pure virtual functions keys () 和 create ()，和導齣類采用 Q_EXPORT_PLUGIN2 () macro. See the SQL plugins that come with Qt for example implementations (in the plugins/src/sqldrivers subdirectory of the source distribution).

另請參閱 如何創建 Qt 插件 .

成員函數文檔編製

QSqlDriverPlugin:: QSqlDriverPlugin ( QObject * parent = 0)

Constructs a SQL driver plugin and sets the parent to parent . This is invoked automatically by the Q_EXPORT_PLUGIN2 () 宏。

QSqlDriverPlugin:: ~QSqlDriverPlugin ()

Destroys the SQL driver plugin.

從不需要明確調用這。Qt 自動銷毀插件當不再使用時。

`[pure virtual]` QSqlDriver * QSqlDriverPlugin:: create (const QString & key )

創建並返迴 QSqlDriver object for the driver called key . The driver key is usually the class name of the required driver. Keys are case sensitive.

另請參閱 keys ().

`[pure virtual]` QStringList QSqlDriverPlugin:: keys () const

Returns the list of drivers (keys) this plugin supports.

These keys are usually the class names of the custom drivers that are implemented in the plugin.

另請參閱 create ().

內容