Qt：显示来自QByteArray的字节

Question

这可能是一个愚蠢的问题，但例如，我似乎找不到如何显示QByteArray中的字节为“ 01011000”的信息。

Answer 1

That's because the function is not related to the scope of QByteArray , which is a simple byte container. Instead, you need to get the specific byte (as char ) to print and show singles bits from it. For instance, try this (magic):

char myByte = myByteArray.at(0);

for (int i = 7; i >= 0; --i) {
    std::cout << ((myByte >> i) & 1);
}

Assuming that your machine has 8-bit bytes (which is not as a bold statement as it would have been 20 years ago).