PySide.QtXmlPatterns.QAbstractUriResolver class is a callback interface for resolving Uniform Resource Identifiers.
A Uniform Resource Identifier (URI) is a string that uniquely identifies a resource. URIs are versatile global identifiers. It is often useful to transform a URI that identifies something logical into a URI that locates something physical (a URL), or to simply map a URI to a different URI. QAbstractUriResolver.resolve() provides this functionality.
For example, one could write a PySide.QtXmlPatterns.QAbstractUriResolver subclass that rewrites library ISBN number URIs as book title URLs, e.g., urn:isbn:0-345-33973-8 would be rewritten as file:///books/returnOfTheKing.doc . Or a PySide.QtXmlPatterns.QAbstractUriResolver subclass could be written for a web browser to let the web browser protect the user's private files by mapping incoming requests for them to null URIs.
| 参数： | parent – PySide.QtCore.QObject |
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构造 PySide.QtXmlPatterns.QAbstractUriResolver with the specified parent .
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| 返回类型： |
返回 relative URI resolved using the baseURI .
The caller guarantees that both relative and baseURI are valid, and that baseURI is absolute. relative can be relative, absolute, or empty.
返回的 PySide.QtCore.QUrl can be a default constructed PySide.QtCore.QUrl . If it is not a default constructed PySide.QtCore.QUrl , it will be absolute and valid. If a default constructed PySide.QtCore.QUrl is returned, it means the relative URI was not accepted to be resolved.
If the reimplemented PySide.QtXmlPatterns.QAbstractUriResolver.resolve() function decides it has nothing to do about resolving the relative URI, it should simply return the relative URI resolved against the baseURI , i.e.:
return baseURI.resolved(relative);
另请参阅
QUrl.isRelative() QUrl.isValid()