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- QAccel类
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- qdatabrowser.h Include File
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- QDataStream类
- qdatastream.h包含文件
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- qdial.h Include File
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- QDialog类
- qdialog.h包含文件
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- qdirectpainter_qws.h Include File
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- qdir.h包含文件
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- qdockarea.h包含文件
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- qdockwindow.h包含文件
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- QDomAttr Class
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- qdom.h Include File
- QDomImplementation Class
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- QDomNamedNodeMap Class
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- QDomNode Class
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- QDomNotation Class
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- QDomText Class
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- QDoubleValidator类
- QDoubleValidator成员列表
- QDragEnterEvent Class
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- QDragMoveEvent Class
- QDragMoveEvent Member List
- QDragObject Class
- qdragobject.h Include File
- QDragObject Member List
- qdrawutil.h Include File
- QDropEvent Class
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- QDropSite Class
- qdropsite.h Include File
- QEditorFactory Class
- qeditorfactory.h Include File
- QEditorFactory Member List
- QEmbed - File and Image Embedder
- QErrorMessage类
- qerrormessage.h包含文件
- QErrorMessage成员列表
- QEucJpCodec Class
- qeucjpcodec.h Include File
- QEucJpCodec Member List
- QEucKrCodec Class
- qeuckrcodec.h Include File
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- QEvent类
- qevent.h包含文件
- QEvent成员列表
- Font Displayer
- QFile类
- QFileDialog类
- qfiledialog.h包含文件
- QFileDialog成员列表
- qfile.h包含文件
- QFileIconProvider Class
- QFileIconProvider Member List
- QFileInfo Class
- qfileinfo.h Include File
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- QFile成员列表
- QFilePreview Class
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- QFocusData Class
- qfocusdata.h Include File
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- QFocusEvent Class
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- QFont Class
- QFontDatabase Class
- qfontdatabase.h Include File
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- QFontDialog类
- qfontdialog.h包含文件
- QFontDialog成员列表
- QFont Examples
- qfont.h Include File
- QFontInfo Class
- qfontinfo.h Include File
- QFontInfo Member List
- QFontManager Class
- qfontmanager_qws.h Include File
- QFontManager Member List
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- QFontMetrics Class
- qfontmetrics.h Include File
- QFontMetrics Member List
- QFrame类
- qframe.h包含文件
- QFrame成员列表
- QFtp类
- qftp.h包含文件
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- QGb18030Codec Class
- qgb18030codec.h Include File
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- QGbkCodec Class
- QGbkCodec Member List
- qgfx_qws.h Include File
- QGL Class
- QGLayoutIterator Class
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- QGLColormap Class
- qglcolormap.h Include File
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- QGLContext Class
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- QGLFormat Class
- QGLFormat Member List
- qgl.h Include File
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- qglobal.h Include File
- QGLWidget Class
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- QGrid类
- qgrid.h包含文件
- QGridLayout Class
- QGridLayout Member List
- QGrid成员列表
- QGridView Class
- qgridview.h Include File
- QGridView Member List
- QGroupBox类
- qgroupbox.h包含文件
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- QGuardedPtr类
- qguardedptr.h包含文件
- QGuardedPtr成员列表
- QHBox Class
- qhbox.h Include File
- QHBoxLayout Class
- QHBoxLayout Member List
- QHBox Member List
- QHButtonGroup类
- qhbuttongroup.h包含文件
- QHButtonGroup成员列表
- QHeader类
- qheader.h包含文件
- QHeader成员列表
- QHebrewCodec Class
- QHebrewCodec Member List
- QHGroupBox类
- qhgroupbox.h包含文件
- QHGroupBox成员列表
- QHideEvent Class
- QHideEvent Member List
- QHostAddress Class
- qhostaddress.h Include File
- QHostAddress Member List
- QHttp Class
- qhttp.h Include File
- QHttp Member List
- QIconDrag Class
- QIconDragItem Class
- QIconDragItem Member List
- QIconDrag Member List
- QIconSet Class
- qiconset.h Include File
- QIconSet Member List
- QIconView Class
- qiconview.h Include File
- QIconViewItem Class
- QIconViewItem Member List
- QIconView Member List
- QImage Class
- QImageConsumer Class
- QImageConsumer Member List
- QImageDecoder Class
- QImageDecoder Member List
- QImageDrag Class
- QImageDrag Member List
- QImageFormat Class
- QImageFormat Member List
- QImageFormatPlugin Class
- qimageformatplugin.h Include File
- QImageFormatPlugin Member List
- QImageFormatType Class
- QImageFormatType Member List
- qimage.h Include File
- QImageIO Class
- QImageIO Member List
- QImage Member List
- QIMEvent Class
- QIMEvent Member List
- QInputDialog类
- qinputdialog.h包含文件
- QInputDialog成员列表
- QIntCache Class
- qintcache.h Include File
- QIntCacheIterator Class
- QIntCacheIterator Member List
- QIntCache Member List
- QIntDict Class
- qintdict.h Include File
- QIntDictIterator Class
- QIntDictIterator Member List
- QIntDict Member List
- QIntValidator类
- QIntValidator成员列表
- QIODevice类
- qiodevice.h包含文件
- QIODevice成员列表
- QIODeviceSource Class
- QJisCodec Class
- qjiscodec.h Include File
- QJisCodec Member List
- qkeyboard_qws.h Include File
- QKeyEvent Class
- QKeyEvent Member List
- QKeySequence Class
- qkeysequence.h Include File
- QKeySequence Member List
- QLabel Class
- qlabel.h Include File
- QLabel Member List
- QLayout Class
- qlayout.h Include File
- QLayoutItem Class
- QLayoutItem Member List
- QLayoutIterator Class
- QLayoutIterator Member List
- QLayout Member List
- QLCDNumber Class
- qlcdnumber.h Include File
- QLCDNumber Member List
- QLibrary Class
- qlibrary.h Include File
- QLibrary Member List
- QLineEdit Class
- qlineedit.h Include File
- QLineEdit Member List
- QListBox Class
- qlistbox.h Include File
- QListBoxItem Class
- QListBoxItem Member List
- QListBox Member List
- QListBoxPixmap Class
- QListBoxPixmap Member List
- QListBoxText Class
- QListBoxText Member List
- QListView Class
- qlistview.h Include File
- QListViewItem Class
- QListViewItemIterator Class
- QListViewItemIterator Member List
- QListViewItem Member List
- QListView Member List
- QLocalFs Class
- qlocalfs.h Include File
- QLocalFs Member List
- QLock Class
- qlock_qws.h Include File
- QLock Member List
- QMag
- QMainWindow类
- qmainwindow.h包含文件
- QMainWindow成员列表
- qmake的介绍
- 安装qmake
- 10分钟学会使用qmake
- qmake教程
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- QMap Class
- QMapConstIterator Class
- QMapConstIterator Member List
- qmap.h Include File
- QMapIterator Class
- QMapIterator Member List
- QMap Member List
- QMemArray类
- qmemarray.h包含文件
- QMemArray成员列表
- QMenuBar Class
- qmenubar.h Include File
- QMenuBar Member List
- QMenuData Class
- qmenudata.h Include File
- QMenuData Member List
- QMessageBox类
- qmessagebox.h包含文件
- QMessageBox成员列表
- QMetaObject Class
- qmetaobject.h Include File
- QMetaObject Member List
- QMetaProperty Class
- QMetaProperty Member List
- qmime.h Include File
- QMimeSource Class
- QMimeSourceFactory Class
- QMimeSourceFactory Member List
- QMimeSource Member List
- QMotifPlusStyle Class
- qmotifplusstyle.h Include File
- QMotifPlusStyle Member List
- QMotifStyle Class
- qmotifstyle.h Include File
- QMotifStyle Member List
- QMouseEvent Class
- QMouseEvent Member List
- QMoveEvent Class
- QMoveEvent Member List
- QMovie Class
- qmovie.h Include File
- QMovie Member List
- QMultiLineEdit Class
- qmultilineedit.h Include File
- QMultiLineEdit Member List
- QMutex类
- qmutex.h包含文件
- QMutex成员列表
- qnamespace.h Include File
- qnetwork.h Example File
- QNetworkOperation Class
- QNetworkOperation Member List
- QNetworkProtocol Class
- qnetworkprotocol.h Include File
- QNetworkProtocol Member List
- qnp.h Include File
- QNPInstance Class
- QNPInstance Member List
- QNPlugin Class
- QNPlugin Member List
- QNPStream Class
- QNPStream Member List
- QNPWidget Class
- QNPWidget Member List
- QObject类
- QObjectCleanupHandler Class
- qobjectcleanuphandler.h Include File
- QObjectCleanupHandler Member List
- qobject.h包含文件
- QObjectList类
- qobjectlist.h包含文件
- QObjectListIt类
- QObjectListIt成员列表
- QObjectList成员列表
- QObject成员列表
- QPaintDevice类
- qpaintdevice.h包含文件
- QPaintDevice成员列表
- QPaintDeviceMetrics Class
- qpaintdevicemetrics.h Include File
- QPaintDeviceMetrics Member List
- QPainter类
- qpainter.h包含文件
- QPainter成员列表
- QPaintEvent Class
- QPaintEvent Member List
- QPair Class
- qpair.h Include File
- QPair Member List
- QPalette Class
- qpalette.h Include File
- QPalette Member List
- QPen Class
- qpen.h Include File
- QPen Member List
- QPicture Class
- qpicture.h Include File
- QPicture Member List
- QPixmap Class
- QPixmapCache Class
- qpixmapcache.h Include File
- QPixmapCache Member List
- qpixmap.h Include File
- QPixmap Member List
- QPlatinumStyle Class
- qplatinumstyle.h Include File
- QPlatinumStyle Member List
- QPNGImagePacker Class
- QPNGImagePacker Member List
- qpngio.h Include File
- QPoint类
- QPointArray Class
- qpointarray.h Include File
- QPointArray Member List
- qpoint.h包含文件
- QPoint成员列表
- QPopupMenu Class
- qpopupmenu.h Include File
- QPopupMenu Member List
- QPrinter Class
- qprinter.h Include File
- QPrinter Member List
- QProcess Class
- QProcess Examples
- qprocess.h Include File
- QProcess Member List
- QProgressBar Class
- qprogressbar.h Include File
- QProgressBar Member List
- QProgressDialog类
- qprogressdialog.h包含文件
- QProgressDialog成员列表
- QPtrCollection类
- qptrcollection.h包含文件
- QPtrCollection成员列表
- QPtrDict Class
- qptrdict.h Include File
- QPtrDictIterator Class
- QPtrDictIterator Member List
- QPtrDict Member List
- QPtrList类
- qptrlist.h包含文件
- QPtrListIterator类
- QPtrListIterator成员列表
- QPtrList成员列表
- QPtrQueue类
- qptrqueue.h包含文件
- QPtrQueue成员列表
- QPtrStack类
- qptrstack.h包含文件
- QPtrStack成员列表
- QPtrVector类
- qptrvector.h包含文件
- QPtrVector成员列表
- QPushButton类
- qpushbutton.h包含文件
- QPushButton成员列表
- QRadioButton Class
- qradiobutton.h Include File
- QRadioButton Member List
- QRangeControl类
- qrangecontrol.h包含文件
- QRangeControld成员列表
- QRect类
- qrect.h包含文件
- QRect成员列表
- QRegExp Class
- qregexp.h Include File
- QRegExp Member List
- QRegExpValidator Class
- QRegExpValidator Member List
- QRegion Class
- qregion.h Include File
- QRegion Member List
- QResizeEvent Class
- QResizeEvent Member List
- qrtlcodec.h Include File
- QScreen Class
- QScreen Member List
- QScrollBar类
- qscrollbar.h包含文件
- QScrollBar成员列表
- QScrollView类
- qscrollview.h包含文件
- QScrollView成员列表
- QSemaphore类
- qsemaphore.h包含文件
- QSemaphore成员列表
- QServerSocket Class
- qserversocket.h Include File
- QServerSocket Member List
- QSessionManager Class
- qsessionmanager.h Include File
- QSessionManager Member List
- QSettings Class
- qsettings.h Include File
- QSettings Member List
- QSGIStyle Class
- qsgistyle.h Include File
- QSGIStyle Member List
- QShowEvent Class
- QShowEvent Member List
- QSignal Class
- qsignal.h Include File
- QSignalMapper Class
- qsignalmapper.h Include File
- QSignalMapper Member List
- QSignal Member List
- QSimpleRichText Class
- qsimplerichtext.h Include File
- QSimpleRichText Member List
- QSize类
- QSizeGrip Class
- qsizegrip.h Include File
- QSizeGrip Member List
- qsize.h包含文件
- QSize成员列表
- QSizePolicy Class
- qsizepolicy.h Include File
- QSizePolicy Member List
- QSjisCodec Class
- qsjiscodec.h Include File
- QSjisCodec Member List
- QSlider Class
- qslider.h Include File
- QSlider Member List
- QSocket类
- QSocketDevice Class
- qsocketdevice.h Include File
- QSocketDevice Member List
- qsocket.h包含文件
- QSocket成员列表
- QSocketNotifier Class
- qsocketnotifier.h Include File
- QSocketNotifier Member List
- QSortedList Class
- qsortedlist.h Include File
- QSortedList Member List
- QSound类
- qsound.h包含文件
- QSound成员列表
- QSpacerItem Class
- QSpacerItem Member List
- QSpinBox Class
- qspinbox.h Include File
- QSpinBox Member List
- QSplitter Class
- qsplitter.h Include File
- QSplitter Member List
- QSql类
- QSqlCursor Class
- qsqlcursor.h Include File
- QSqlCursor Member List
- QSqlDatabase Class
- qsqldatabase.h Include File
- QSqlDatabase Member List
- QSqlDriver Class
- qsqldriver.h Include File
- QSqlDriver Member List
- QSqlDriverPlugin Class
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QTextStream类
QTextStream类提供了使用QIODevice读写文本的基本功能。 详情请见……
#include <qtextstream.h>
由QTextIStream和QTextOStream继承。
所有成员函数的列表。
公有成员
- enum Encoding { Locale, Latin1, Unicode, UnicodeNetworkOrder, UnicodeReverse, RawUnicode, UnicodeUTF8 }
- void setEncoding ( Encodinge )
- void setCodec ( QTextCodec*codec )
- QTextStream ()
- QTextStream ( QIODevice*iod )
- QTextStream ( QString*str, intfilemode )
- QTextStream ( QString&str, intfilemode ) (obsolete)
- QTextStream ( QByteArraya, intmode )
- QTextStream ( FILE*fh, intmode )
- virtual ~QTextStream ()
- QIODevice * device () const
- void setDevice ( QIODevice*iod )
- void unsetDevice ()
- bool atEnd () const
- bool eof () const (obsolete)
- QTextStream & operator>> ( QChar&c )
- QTextStream & operator>> ( char&c )
- QTextStream & operator>> ( signedshort&i )
- QTextStream & operator>> ( unsignedshort&i )
- QTextStream & operator>> ( signedint&i )
- QTextStream & operator>> ( unsignedint&i )
- QTextStream & operator>> ( signedlong&i )
- QTextStream & operator>> ( unsignedlong&i )
- QTextStream & operator>> ( float&f )
- QTextStream & operator>> ( double&f )
- QTextStream & operator>> ( char*s )
- QTextStream & operator>> ( QString&str )
- QTextStream & operator>> ( QCString&str )
- QTextStream & operator<< ( QCharc )
- QTextStream & operator<< ( charc )
- QTextStream & operator<< ( signedshorti )
- QTextStream & operator<< ( unsignedshorti )
- QTextStream & operator<< ( signedinti )
- QTextStream & operator<< ( unsignedinti )
- QTextStream & operator<< ( signedlongi )
- QTextStream & operator<< ( unsignedlongi )
- QTextStream & operator<< ( floatf )
- QTextStream & operator<< ( doublef )
- QTextStream & operator<< ( constchar*s )
- QTextStream & operator<< ( constQString&s )
- QTextStream & operator<< ( constQCString&s )
- QTextStream & operator<< ( void*ptr )
- QTextStream & readRawBytes ( char*s, uintlen )
- QTextStream & writeRawBytes ( constchar*s, uintlen )
- QString readLine ()
- QString read ()
- void skipWhiteSpace ()
- int flags () const
- int flags ( intf )
- int setf ( intbits )
- int setf ( intbits, intmask )
- int unsetf ( intbits )
- void reset ()
- int width () const
- int width ( intw )
- int fill () const
- int fill ( intf )
- int precision () const
- int precision ( intp )
详细描述
QTextStream类提供了使用QIODevice读写文本的基本功能。
文本流类的功能界面和标准的C++的iostream类非常相似。iostream和QTextStream的不同点是我们的流操作在一个很容易被继承的QIODevice上,而iostream只能操作一个不能被继承的FILE *指针。
Qt提供了几个和iostream相似的全局函数:
- bin设置QTextStream来读/写二进制数字
- oct设置QTextStream来读/写八进制数字
- dec设置QTextStream来读/写十进制数字
- hex设置QTextStream来读/写十六进制数字
- endl强制换行
- flush强制QIODevice刷新任何被缓存的数据
- ws作为任何可用的控制符(在输入的时候)
- reset重新设置QTextStream为它的缺省模式(请见reset())
- qSetW(int)设置字段宽度作为指定参数
- qSetFill(int)设置填充字符作为指定参数
- qSetPrecision(int)设置精确度作为指定参数
警告:默认情况下,QTextStream在读取流的时候,会自动地检测流中的数字是十进制、八进制、十六进制或者二进制格式。具体情况是,一个以“0”为开头的数字是八进制的,比如顺序为“0100”将会被解释为64。
QTextStream类读写文本,它不适合处理二进制数据(而QDataStream是适合的)。
默认情况下,输出的是使用本地8位编码后的Unicode文本(比如,QString)。这些可以使用setEncoding()方法进行改变。对于输入,QTextStream会自动检测标准Unicode“字节顺序标记的”文本文件,否则会使用本地8位编码。
QIODevice在构造函数中被设置,或者之后在setDevice()中使用。如果输入到达了atEnd(),返回真。数据可以使用operator>>()重载操作符读到适当类型的变量中,或者使用read()把它作为整个部分读到一个单一的字符串中,或者使用readLine()把一次读一行。使用skipWhiteSpace()可以忽略控制符。你可以使用flags()或setf()来设置流的标记。这个流也支持width()、precision()和 fill(),使用reset()可以重新恢复默认设置。
也可以参考QDataStream、输入/输出和网络和文本相关类.
成员类型文档
QTextStream::Encoding
- QTextStream::Locale
- QTextStream::Latin1
- QTextStream::Unicode
- QTextStream::UnicodeNetworkOrder
- QTextStream::UnicodeReverse
- QTextStream::RawUnicode
- QTextStream::UnicodeUTF8
成员函数文档
QTextStream::QTextStream ()
构造一个没有IO设备的文本流。QTextStream::QTextStream ( QIODevice*iod )
构造一个使用iodIO设备的文本流。QTextStream::QTextStream ( QString*str, intfilemode )
构造一个通过内部设备操作UnicodeQString的str的文本流。filemode参数会被传递给设备的open()函数,请参考QIODevice::mode()。如果你使用setEncoding()或setCodec()来设置一个编码或者编码器,当文本流在QString上操作时,这个设置将被忽略。
实例:
QString str; QTextStream ts( &str, IO_WriteOnly ); ts << "pi = " << 3.14; // str == "pi = 3.14"
写数据到文本流将会修改字符串的内容。如果所写的内容超过字符串的范围,字符串会被扩大。注意字符串不会被截短。
QString str = "pi = 3.14"; QTextStream ts( &str, IO_WriteOnly ); ts << "2+2 = " << 2+2; // str == "2+2 = 414"
注意因为QString是Unicode的,你不应该在这样的流上使用readRawBytes()或writeRawBytes()。
QTextStream::QTextStream ( QString&str, intfilemode )
这个函数是废弃的。它的提供只是为了保证旧代码能够工作。我们强烈建议在新代码中不要使用它。
这个构造函数和使用一个QString*参数的构造函数一样。
QTextStream::QTextStream ( QByteArraya, intmode )
构造一个通过内部QBuffer设备操作字节数组a的文本流。filemode参数会被传递给设备的open()函数,请参考QIODevice::mode()。实例:
QByteArray array; QTextStream ts( array, IO_WriteOnly ); ts << "pi = " << 3.14 << '\0'; // array == "pi = 3.14"
写数据到文本流将会修改数组的内容。如果所写的内容超过数组的范围,数组会被扩大。
同样的实例,使用QBuffer:
QByteArray array; QBuffer buf( array ); buf.open( IO_WriteOnly ); QTextStream ts( &buf ); ts << "pi = " << 3.14 << '\0'; // array == "pi = 3.14" buf.close();
QTextStream::QTextStream ( FILE*fh, intmode )
构造一个通过内部的QFile设备操作已经存在的文件句柄fh的文本流。filemode参数会被传递给设备的open()函数,请参考QIODevice::mode()。注意如果你创建了一个QTextStreamcout或者也被其他类型的另一个变量使用的另一个名称,一些连接器也许会搞混这两个变量,这经常会导致程序崩溃。
QTextStream::~QTextStream () [虚]
销毁这个文本流。这个析构函数对当前IO设备没有任何影响。
bool QTextStream::atEnd () const
如果IO设备已经达到终点(流或文件的终点),或者如果没有IO设备被设置,返回真,否则返回假。也可以参考QIODevice::atEnd()。
实例:addressbook/centralwidget.cpp和grapher/grapher.cpp。
QIODevice* QTextStream::device () const
返回当前设置的IO设备。也可以参考setDevice()和unsetDevice()。
bool QTextStream::eof () const
这个函数是废弃的。它的提供只是为了保证旧代码能够工作。我们强烈建议在新代码中不要使用它。
这个函数已经被重新命名为atEnd()。
也可以参考QIODevice::atEnd()。
实例:chart/chartform_files.cpp。
int QTextStream::fill () const
返回填充字符。默认值是“ ”(空格)。int QTextStream::fill ( intf )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。设置填充字符为f。返回以前的填充字符。
int QTextStream::flags () const
返回当前的流标记。默认值为0。标记的意义是:
- skipws - 当前不被使用了,控制符总是被忽略
- left - 数字字段左对齐
- right - 当前不被使用了(默认情况下,数字字段是右对齐的)
- internal - 在+/-和值的中间填充空格
- bin - 输入和输出只使用二进制
- oct - 输入和输出只使用八进制
- dec - 输入和输出只使用十进制
- hex - 输入和输出只使用十六进制
- showbase - 如果使用bin、oct或hex格式,数字输出使用0b、0和0x注释
- showpoint - 当前不被使用了
- uppercase - 使用0B和0X,而不用0b和0x
- showpos - 对正数显示+
- scientific - 对浮点数使用科学记数法
- fixed - 对浮点数使用固定的位数
注意,如果没有设置bin、oct、dec或hex,那么一个以0开始的值被认为是八进制的,以0x开始的被认为是十六进制的,以0b开始的被认为是二进制的,其它的都被认为是十进制的。
也可以参考setf()和unsetf()。
int QTextStream::flags ( intf )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。设置流标记为f。返回以前的流标记。
也可以参考setf()和unsetf()。
QTextStream& QTextStream::operator<< ( QCharc )
写字符c到流中并且返回流的引用。字符c不依赖于QTextStream的编码设置,被假设为Latin1编码。
QTextStream& QTextStream::operator<< ( charc )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写字符c到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( signedshorti )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写短整型i到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( unsignedshorti )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写无符号的短整型i到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( signedinti )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写有符号的整型i到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( unsignedinti )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写无符号的整型i到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( signedlongi )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写有符号的长整型i到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( unsignedlongi )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写无符号的长整型i到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( floatf )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写单精实型f到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( doublef )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写双精实型f到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( constchar*s )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写一个字符串到流中并且返回流的引用。
字符串s不依赖于QTextStream的编码设置,被假设为Latin1编码。
QTextStream& QTextStream::operator<< ( constQString&s )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写一个s到流中并且返回流的引用。
QTextStream& QTextStream::operator<< ( constQCString&s )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写一个s到流中并且返回流的引用。
字符串s不依赖于QTextStream的编码设置,被假设为Latin1编码。
QTextStream& QTextStream::operator<< ( void*ptr )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。写一个指针到流中并且返回流的引用。
ptr是被作为十六进制的无符号的长整型输出的。
QTextStream& QTextStream::operator>> ( QChar&c )
从流中读取一个字符c并且返回流的引用。 注意控制符不被忽略。QTextStream& QTextStream::operator>> ( char&c )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个字符c并且返回流的引用。
QTextStream& QTextStream::operator>> ( signedshort&i )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个短整型i并且返回流的引用。对于所希望的输入格式的说明,请参考flags()。
QTextStream& QTextStream::operator>> ( unsignedshort&i )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个无符号的短整型i并且返回流的引用。对于所希望的输入格式的说明,请参考flags()。
QTextStream& QTextStream::operator>> ( signedint&i )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个有符号的整型i并且返回流的引用。对于所希望的输入格式的说明,请参考flags()。
QTextStream& QTextStream::operator>> ( unsignedint&i )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个无符号的整型i并且返回流的引用。对于所希望的输入格式的说明,请参考flags()。
QTextStream& QTextStream::operator>> ( signedlong&i )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个有符号的长整型i并且返回流的引用。对于所希望的输入格式的说明,请参考flags()。
QTextStream& QTextStream::operator>> ( unsignedlong&i )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个无符号的长整型i并且返回流的引用。对于所希望的输入格式的说明,请参考flags()。
QTextStream& QTextStream::operator>> ( float&f )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个单精实型f并且返回流的引用。对于所希望的输入格式的说明,请参考flags()。
QTextStream& QTextStream::operator>> ( double&f )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个双精实型f并且返回流的引用。对于所希望的输入格式的说明,请参考flags()。
QTextStream& QTextStream::operator>> ( char*s )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个“词”s并且返回流的引用。对于所希望的输入格式的说明。
一个词是由isspace()返回假的字符组成。
QTextStream& QTextStream::operator>> ( QString&str )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个“词”str并且返回流的引用。对于所希望的输入格式的说明。
一个词是由isspace()返回假的字符组成。
QTextStream& QTextStream::operator>> ( QCString&str )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。从流中读取一个“词”str并且返回流的引用。对于所希望的输入格式的说明。
一个词是由isspace()返回假的字符组成。
int QTextStream::precision () const
返回精确度。默认值为6。int QTextStream::precision ( intp )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。设置精确度为p。返回以前设置的精确度。
QString QTextStream::read ()
读取整个流并且返回包含文本的字符串。也可以参考QIODevice::readLine().
实例:action/application.cpp、application/application.cpp、mdi/application.cpp、qdir/qdir.cpp和qwerty/qwerty.cpp。
QString QTextStream::readLine ()
读取流中的一行并且返回包含文本的字符串。返回的字符串不包含任何换行符和回车符。注意这是和QIODevice::readLine()不一样的,后者不会省略一行最后的换行符。
在EOF处,你会得到一个零QString。在读取一个空行时你得到的QString是空的,但不是零。
也可以参考QIODevice::readLine()。
实例:addressbook/centralwidget.cpp和chart/element.cpp。
QTextStream& QTextStream::readRawBytes ( char*s, uintlen )
从流中读取len字节放到s中并且返回流的引用。缓存s必须被预先分配。
注意这个函数中不使用任何编码方式。
警告:除非流的编码方式被设置为Unicode或者Latin1,这个函数的行为会是不确定的。
也可以参考QIODevice::readBlock()。
void QTextStream::reset ()
重新设置文本流为默认设置。- 所有标记被设置为0。
- 所有字段宽度被设置为0。
- 所有填充字符被设置为“ ”(空格)。
- 精确度被设置为6。
也可以参考setf()、width()、fill()和precision()。
void QTextStream::setCodec ( QTextCodec*codec )
设置流的编码器为codec。如果不设置,会自动设置为Unicode。注意这个函数的调用应该发生在这个流进行读/写数据之前。
也可以参考setEncoding()。
实例:qwerty/qwerty.cpp。
void QTextStream::setDevice ( QIODevice*iod )
设置IO设备为iod。也可以参考device()和unsetDevice()。
void QTextStream::setEncoding ( Encodinge )
设置这个流的编码为e,e为下列之一:- Locale - 使用本地文件格式(如果本地没有设置,就是Latin1),但是会在输入时自动检测是否Unicode(utf16)。
- Unicode - 使用Unicode(utf16)作为输入和输出。输出将会根据当前平台中最有效率的顺序写出来(比如,QString内部使用的顺序)。
- UnicodeUTF8 - 使用Unicode(utf8)作为输入和输出。如果使用它作为输入,它将会自动检测是否utf16,如果是的话,将会使用它代替utf8。
- Latin1 - ISO-8859-1。将不会自动检测utf16。
- UnicodeNetworkOrder - 使用网络顺序的Unicode(utf16)作为输入和输出。当读取不使用字节顺序标记的Unicode的时候是有用的。
- UnicodeReverse - 使用与网络顺序相反的顺序的Unicode(utf16)作为输入和输出。当读取不使用字节顺序标记或者当写供bug很多的Windows应用程序读取的数据的Unicode的时候是有用的。
- RawUnicode - 就像Unicode,但是不写字节顺序标记,也不自动检测字节顺序标记。只有当写供一个单独进程使用的非永久保存的数据的时候是有用的。
Locale和所有的Unicode编码,除了RawUnicode,都将看输入流的头两个字节来决定字节顺序。这个初始的字节顺序标记将会在读数据之前省略掉。
注意这个函数的调用应该发生在这个流进行读/写数据之前。
也可以参考setCodec()。
实例:network/httpd/httpd.cpp和qwerty/qwerty.cpp。
int QTextStream::setf ( intbits )
设置流的标记位为bits。返回以前设置的流标记。和flags( flags() | bits )是一样的。
也可以参考unsetf()。
int QTextStream::setf ( intbits, intmask )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。 设置流的标记位为bits和一个位掩码mask。返回以前设置的流标记。和flags( (flags() & ~mask) | (bits & mask) )是一样的。
也可以参考unsetf()。
void QTextStream::skipWhiteSpace ()
放置读指针在第一个非控制字符上。void QTextStream::unsetDevice ()
清除IO设备。这个和调用setDevice( 0 )一样。也可以参考device()和setDevice()。
int QTextStream::unsetf ( intbits )
清空流标记位bits。返回以前设置的流标记。和flags( flags() & ~mask )是一样的。
也可以参考setf()。
int QTextStream::width () const
返回字段宽度。默认值为0。int QTextStream::width ( intw )
这是一个重载成员函数,提供了方便。它的行为基本上和上面的函数相同。设置字段宽度为w。返回以前设置的字段宽度。
QTextStream& QTextStream::writeRawBytes ( constchar*s, uintlen )
从s写len字节到流中并且返回流的引用。注意这个函数没有使用任何编码。
也可以参考QIODevice::writeBlock()。
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