QT unicode QByteArray与QString互转

QByteArray array;
array[0] = 0xAA;
QString str = QLatin1String(array);
QString str2 = QString::fromLatin1(array);
qDebug() << array << str << str.toLatin1() << str2.toLatin1() << str2;

打印："xAA" "a" "xAA" "xAA" "a"