本文介绍了将QByteArray附加到QDataStream吗?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我必须用不同的数据填充QByteArray
.所以我正在使用QDataStream
.
I have to populate a QByteArray
with different data. So I'm using the QDataStream
.
QByteArray buffer;
QDataStream stream(&buffer, QIODevice::WriteOnly);
qint8 dataHex= 0x04;
qint8 dataChar = 'V';
stream << dataHex<< dataChar;
qDebug() << buffer.toHex(); // "0456" This is what I want
但是,我还想将QByteArray附加到buffer
.
However, I would also like to append a QByteArray to the buffer
.
QByteArray buffer;
QDataStream stream(&buffer, QIODevice::WriteOnly);
qint8 dataHex= 0x04;
qint8 dataChar = 'V';
QByteArray moreData = QByteArray::fromHex("ff");
stream << dataHex<< dataChar << moreData.data(); // char * QByteArray::data ()
qDebug() << buffer.toHex(); // "045600000002ff00" I would like "0456ff"
我想念什么?
推荐答案
在附加char*
时,它假定\0
终止并用writeBytes
进行序列化,该序列也首先写出大小(如uint32)
when a char*
is appended it assumes \0
termination and serializes with writeBytes
which also writes out the size first (as uint32)
len被序列化为quint32,后跟来自s的len个字节.笔记 数据未编码.
The len is serialized as a quint32, followed by len bytes from s. Note that the data is not encoded.
您可以使用writeRawData
来规避它:
stream << dataHex<< dataChar;
stream.writeRawData(moreData.data(), moreDate.size());
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