QDirListing::DirEntry Class
class QDirListing::DirEntry- 継承されたメンバーを含む全メンバーの一覧
- DirEntry は、入出力およびネットワーク機能の一部です。
パブリック関数
| 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 |
詳細な説明
有効なQDirListing::const_iterator の参照を解除すると、DirEntryオブジェクトが返されます。
DirEntry は、QFileInfo の API のサブセット（たとえば、fileName()、filePath()、exists() など）を提供します。内部的には、DirEntry は必要な場合、つまり他のシステム関数によってその情報がまだ取得されていない場合にのみ、QFileInfo オブジェクトを構築します。DirEntry::fileInfo() を使用して、QFileInfo を取得できます。例：
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 */) { /* ... */ }
}メンバ関数のドキュメント
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
同じ名前のQFileInfo メソッドを参照してください。
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