qt 序列化和反序列化

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     序列化：
     QByteArray buffer;

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    QBuffer bufferDevice(&buffer);

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    bufferDevice.open(QIODevice::WriteOnly);

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    QDataStream out(&bufferDevice);

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    out.setVersion(QDataStream::Qt_5_13);

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 void deserialize(const QByteArray &buffer) {

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        QBuffer bufferDevice(const_cast<QByteArray*>(&buffer));

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        bufferDevice.open(QIODevice::ReadOnly);

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        QDataStream in(&bufferDevice);

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        in.setVersion(QDataStream::Qt_5_13);

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        in >>frameHeader >> packetSeq >> dataLength >> batteryLevel >> channelCount

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           >> pitchAngle >> rollAngle >> yawAngle >> ecg >> spo2

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           >> reserved1 >> reserved2 >> reserved3 >> reserved4;

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        dataBlock.resize(dataLength);

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        in.readRawData(dataBlock.data(), dataLength);