QString 类求助

[gxlsunday]

QByteArray byte_data=tcplink->readAll();
QString str = byte_data.toHex().data();
最近看别人写的代码，byte_data.toHex().data();什么意思看不明白
望各位高手扫盲！谢谢

[dext]

将 ByteArray 中的实际数据，变成十六进制的字符串显示出来。 如果以前的ByteArray 是 ['Q', 't'] toHex 变成了 ['5','1','7','4'] 在data 变成QString 的 ‘5174’

[_Gx]

先转成16进制,再转成QString

[xcyl]

楼上两位的 +10086

[xiuxianshen]

QByteArray QByteArray::toHex() const Returns a hex encoded copy of the byte array. The hex encoding uses the numbers 0-9 and the letters a-f. char * QByteArray::data() Returns a pointer to the data stored in the byte array. The pointer can be used to access and modify the bytes that compose the array. The data is '\0'-terminated, i.e. the number of bytes in the returned character string is size() + 1 for the '\0' terminator. toHex()将QByteArray转换成16进制，data()将QByteArray转换成char*， 然后利用QString的拷贝构造函数将char*转换成QString