QQuickAsyncImageProvider Class

The QQuickAsyncImageProvider class provides an interface for for asynchronous control of QML image requests. 更多...

头：	#include <QQuickAsyncImageProvider>
qmake:	QT += quick
Since:	Qt 5.6
继承：	QQuickImageProvider

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公共函数

	QQuickAsyncImageProvider ()
virtual	~QQuickAsyncImageProvider () override
virtual QQuickImageResponse *	requestImageResponse (const QString & id , const QSize & requestedSize ) = 0

5 public functions inherited from QQuickImageProvider
2 公共函数继承自 QQmlImageProviderBase

详细描述

The QQuickAsyncImageProvider class provides an interface for for asynchronous control of QML image requests.

见 Image Response Provider Example for a complete implementation.

另请参阅 QQuickImageProvider .

成员函数文档编制

QQuickAsyncImageProvider:: QQuickAsyncImageProvider ()

Default constructs an instance of QQuickAsyncImageProvider.

`[override virtual]` QQuickAsyncImageProvider:: ~QQuickAsyncImageProvider ()

Destroys the instance of QQuickAsyncImageProvider. The destructor is virtual.

`[pure virtual]` QQuickImageResponse QQuickAsyncImageProvider:: requestImageResponse (const QString & id , const QSize & requestedSize* )

Implement this method to return the job that will provide the texture with id .

The id is the requested image source, with the "image:" scheme and provider identifier removed. For example, if the image source was "image://myprovider/icons/home", the given id would be "icons/home".

The requestedSize corresponds to the Image::sourceSize requested by an Image item. If requestedSize is a valid size, the image returned should be of that size.

注意： this method may be called by multiple threads, so ensure the implementation of this method is reentrant.

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