DirEntry Class

class QDirListing ::DirEntry

所有成员列表，包括继承成员
DirEntry is part of 输入/输出和网络 .

公共函数

QString	absoluteFilePath () const
QString	absolutePath () const
QString	baseName () const
QDateTime	birthTime (const QTimeZone & tz ) const
QString	bundleName () const
QString	canonicalFilePath () const
QString	completeBaseName () const
QString	completeSuffix () const
bool	exists () const
QFileInfo	fileInfo () const
QString	fileName () const
QString	filePath () const
QDateTime	fileTime (QFileDevice::FileTime type , const QTimeZone & tz ) const
bool	isDir () const
bool	isExecutable () const
bool	isFile () const
bool	isHidden () const
bool	isReadable () const
bool	isSymLink () const
bool	isWritable () const
QDateTime	lastModified (const QTimeZone & tz ) const
QDateTime	lastRead (const QTimeZone & tz ) const
QDateTime	metadataChangeTime (const QTimeZone & tz ) const
qint64	size () const
QString	suffix () const

详细描述

Dereferencing a valid QDirListing::const_iterator returns a DirEntry object.

DirEntry offers a subset of QFileInfo 's API (for example, fileName (), filePath (), exists ()). Internally, DirEntry only constructs a QFileInfo object if needed, that is, if the info hasn't been already fetched by other system functions. You can use DirEntry::fileInfo () to get a QFileInfo 。例如：

using ItFlag = QDirListing::IteratorFlag;
for (const auto &dirEntry : QDirListing(u"/etc"_s, ItFlag::Recursive)) {
    // Faster
    if (dirEntry.fileName().endsWith(u".conf")) { /* ... */ }
    // This works, but might be potentially slower, since it has to construct a
    // QFileInfo, whereas (depending on the implementation) the fileName could
    // be known already
    if (dirEntry.fileInfo().fileName().endsWith(u".conf")) { /* ... */ }
}
using ItFlag = QDirListing::IteratorFlag;
for (const auto &dirEntry : QDirListing(u"/etc"_s, ItFlag::Recursive)) {
    // Both approaches are the same, because DirEntry will have to construct
    // a QFileInfo to get this info (for example, by calling system stat())
    if (dirEntry.size() >= 4'000 /* 4KB */) { /* ...*/ }
    if (dirEntry.fileInfo().size() >= 4'000 /* 4KB */) { /* ... */ }
}

成员函数文档编制

QDateTime DirEntry:: birthTime (const QTimeZone & tz ) const

QDateTime DirEntry:: fileTime ( QFileDevice::FileTime type , const QTimeZone & tz ) const

QDateTime DirEntry:: lastModified (const QTimeZone & tz ) const

QDateTime DirEntry:: lastRead (const QTimeZone & tz ) const

QDateTime DirEntry:: metadataChangeTime (const QTimeZone & tz ) const

QFileInfo DirEntry:: fileInfo () const

QString DirEntry:: absoluteFilePath () const

QString DirEntry:: absolutePath () const

QString DirEntry:: baseName () const

QString DirEntry:: bundleName () const

QString DirEntry:: canonicalFilePath () const

QString DirEntry:: completeBaseName () const

QString DirEntry:: completeSuffix () const

QString DirEntry:: fileName () const

QString DirEntry:: filePath () const

QString DirEntry:: suffix () const

bool DirEntry:: exists () const

bool DirEntry:: isDir () const

bool DirEntry:: isExecutable () const

bool DirEntry:: isFile () const

bool DirEntry:: isHidden () const

bool DirEntry:: isReadable () const

bool DirEntry:: isSymLink () const

bool DirEntry:: isWritable () const

qint64 DirEntry:: size () const

见 QFileInfo methods with the same names.