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Using QByteArray: Difference between revisions
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===Introduction=== | [[Category:Developing with Qt]] | ||
=== Introduction === | |||
QByteArray is the Qt class to store a array of bytes. It is analogous to a char *. Unlike a QString, a QByteArray has no encoding information and makes no attempt to decode bytes into characters. | QByteArray is the Qt class to store a array of bytes. It is analogous to a char *. Unlike a QString, a QByteArray has no encoding information and makes no attempt to decode bytes into characters. | ||
===Converting QByteArray to QString=== | === Converting QByteArray to QString === | ||
To convert a QByteArray to QString, one needs to specify the encoding. It is not possible to convert a QByteArray to QString without knowing the encoding. Once the encoding is known, one can use functions like QString::fromUtf8, QString::fromUcs4 or use QTextCodec::toUnicode(). | To convert a QByteArray to QString, one needs to specify the encoding. It is not possible to convert a QByteArray to QString without knowing the encoding. Once the encoding is known, one can use functions like QString::fromUtf8, QString::fromUcs4 or use QTextCodec::toUnicode(). | ||
===QByteArray::fromRawData()=== | === QByteArray::fromRawData() === | ||
No copy. Copies point to raw data. | No copy. Copies point to raw data. | ||
===QByteArray::constData=== | === QByteArray::constData === | ||
Latest revision as of 13:21, 22 November 2016
Introduction
QByteArray is the Qt class to store a array of bytes. It is analogous to a char *. Unlike a QString, a QByteArray has no encoding information and makes no attempt to decode bytes into characters.
Converting QByteArray to QString
To convert a QByteArray to QString, one needs to specify the encoding. It is not possible to convert a QByteArray to QString without knowing the encoding. Once the encoding is known, one can use functions like QString::fromUtf8, QString::fromUcs4 or use QTextCodec::toUnicode().
QByteArray::fromRawData()
No copy. Copies point to raw data.