QString::QString ( const QChar * unicode, int size )
Constructs a string initialized with the first size characters of the QChar array unicode.
QString makes a deep copy of the string data.
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QT_ASCII_CAST_WARN_CONSTRUCTOR QChar::QChar ( char ch )
Constructs a QChar corresponding to ASCII/Latin-1 character ch.
或者
QT_ASCII_CAST_WARN_CONSTRUCTOR QChar::QChar ( uchar ch )
Constructs a QChar corresponding to ASCII/Latin-1 character ch.