qfile exists
bool QFile::exists() const. 判断当前文件是否存在。 bool QFile::link(const QString & linkName). 为当前文件创建一个新的快捷方式linkName ，创建成功返回true， ... ,sample.txt"); QFile file(fileName); if(QFileInfo::exists(fileName)) qDebug () << "file exists" << endl; file.open(QIODevice::ReadWrite ... ,QFile Class. The QFile class provides an interface for reading from and writing to files. ..... [static] bool QFile::exists(const QString & fileName). Returns true if the ... ,QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... ,The QFile class provides an interface for reading from and writing to files. ... You can check for a file's existence using exists(), and remove a file using remove(). ,QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... ,QFile Class. The QFile class provides an interface for reading from and writing to files. More .... [static] bool QFile::exists(const QString & fileName). Returns true if ... ,QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... ,QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... ,QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ...
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 qfile exists 相關參考資料
7.2 基本文件读写QFile - Qt编程指南 - LUG@USTC
bool QFile::exists() const. 判断当前文件是否存在。 bool QFile::link(const QString & linkName). 为当前文件创建一个新的快捷方式linkName ，创建成功返回true， ... https://qtguide.ustclug.org Check if file exists Qt | Qt Forum
sample.txt"); QFile file(fileName); if(QFileInfo::exists(fileName)) qDebug () << "file exists" << endl; file.open(QIODevice::ReadWrite ... https://forum.qt.io QFile Class | Qt 4.8 - Qt Documentation
QFile Class. The QFile class provides an interface for reading from and writing to files. ..... [static] bool QFile::exists(const QString & fileName). Returns true if the ... https://doc.qt.io QFile Class | Qt Core 5.10 - Qt Documentation
QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... https://doc.qt.io QFile Class | Qt Core 5.13.2 - Qt Documentation
The QFile class provides an interface for reading from and writing to files. ... You can check for a file's existence using exists(), and remove a file using remove(). https://doc.qt.io QFile Class | Qt Core 5.15.0 - Qt Documentation Snapshots
QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... https://doc-snapshots.qt.io QFile Class | Qt Core 5.5 - Qt Documentation
QFile Class. The QFile class provides an interface for reading from and writing to files. More .... [static] bool QFile::exists(const QString & fileName). Returns true if ... https://doc.qt.io QFile Class | Qt Core 5.8 - Qt Documentation
QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... https://doc.qt.io QFile Class | Qt Core 5.9 - Qt Documentation
QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... https://doc.qt.io QFile Class | Qt Core 5.9 - Qt Documentation Snapshots
QFile Class. The QFile class provides an interface for reading from and writing to files. More. .... [static] bool QFile::exists(const QString &fileName). Returns true if ... https://doc-snapshots.qt.io |