QSqlDriverPlugin Class

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

头文件:	#include <QSqlDriverPlugin>
qmake:	QT += sql
基类:	QObject

所有的成员列表, 包括继承的成员

公有函数

	QSqlDriverPlugin(QObject *parent = Q_NULLPTR)
	~QSqlDriverPlugin()
virtual QSqlDriver *	create(const QString &key) = 0

32 个公有函数继承自 QObject

其他继承的成员

1 个属性继承自 QObject
1 个公有槽函数继承自 QObject
2 个信号继承自 QObject
1 个公有变量继承自 QObject
10 个静态公有成员继承自 QObject
9 个受保护的函数继承自 QObject
2 个受保护的变量继承自 QObject

详细描述

The QSqlDriverPlugin class provides an abstract base for custom QSqlDriver plugins.

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 function create(), and exporting the class with the Q_PLUGIN_METADATA() macro. See the SQL plugins that come with Qt for example implementations (in the plugins/src/sqldrivers subdirectory of the source distribution).

The json file containing the metadata for the plugin contains a list of keys indicating the supported sql drivers


  { "Keys": [ "mysqldriver" ] }

参见 How to Create Qt Plugins.

成员函数

QSqlDriverPlugin::QSqlDriverPlugin(QObject **parent* = Q_NULLPTR)

Constructs a SQL driver plugin and sets the parent to parent. This is invoked automatically by the moc generated code that exports the plugin.

QSqlDriverPlugin::~QSqlDriverPlugin()

Destroys the SQL driver plugin.

You never have to call this explicitly. Qt destroys a plugin automatically when it is no longer used.

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

Creates and returns a QSqlDriver object for the driver called key. The driver key is usually the class name of the required driver. Keys are case sensitive.