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我有以下代码:

QByteArray ba; // Declare Byte array
ba.clear();    // Clear it
ba.append(80, 0x00); // Append 80 bytes of 0x00
quint32 Count = 2;   // The number we want to append to the byte array
QBuffer tempBuffer(&ba); // We use temporary buffer to conveniently put integers and floats into byte-array
tempBuffer.open(QIODevice::WriteOnly);
Count = qToLittleEndian(Count); // Make sure our number is little Endian
tempBuffer.write((char*)&Count, sizeof(quint32)); // Write the number to byte array

当我打印以控制台我的字节数组的内容时:

qDebug() << "ba: " << ba.toHex();

控制台打印:

ba:  "0200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"

如上所示,2类型为 的quint32,由 的小端十六进制值正确表示0x02000000,但是,它被添加到字节数组的开头而不是结尾。如何将我的值附加到字节数组的末尾?

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1 回答 1

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以追加模式而不是writeonly打开缓冲区:

tempBuffer.open(QIODevice::Append);
于 2018-08-14T07:19:30.107 回答