Qt类库怎么使用

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函数名

    //int转字节数组    static QByteArray intToByte(int i);    static QByteArray intToByteRec(int i);    //字节数组转int    static int byteToInt(const QByteArray &data);    static int byteToIntRec(const QByteArray &data);    static quint32 byteToUInt(const QByteArray &data);    static quint32 byteToUIntRec(const QByteArray &data);    //ushort转字节数组    static QByteArray ushortToByte(ushort i);    static QByteArray ushortToByteRec(ushort i);    //字节数组转ushort    static int byteToUShort(const QByteArray &data);    static int byteToUShortRec(const QByteArray &data);

函数体

QByteArray QUIHelper::intToByte(int i){    QByteArray result;    result.resize(4);    result[3] = (uchar)(0x000000ff & i);    result[2] = (uchar)((0x0000ff00 & i) >> 8);    result[1] = (uchar)((0x00ff0000 & i) >> 16);    result[0] = (uchar)((0xff000000 & i) >> 24);    return result;}QByteArray QUIHelper::intToByteRec(int i){    QByteArray result;    result.resize(4);    result[0] = (uchar)(0x000000ff & i);    result[1] = (uchar)((0x0000ff00 & i) >> 8);    result[2] = (uchar)((0x00ff0000 & i) >> 16);    result[3] = (uchar)((0xff000000 & i) >> 24);    return result;}int QUIHelper::byteToInt(const QByteArray &data){    int i = data.at(3) & 0x000000ff;    i |= ((data.at(2) << 8) & 0x0000ff00);    i |= ((data.at(1) << 16) & 0x00ff0000);    i |= ((data.at(0) << 24) & 0xff000000);    return i;}int QUIHelper::byteToIntRec(const QByteArray &data){    int i = data.at(0) & 0x000000ff;    i |= ((data.at(1) << 8) & 0x0000ff00);    i |= ((data.at(2) << 16) & 0x00ff0000);    i |= ((data.at(3) << 24) & 0xff000000);    return i;}quint32 QUIHelper::byteToUInt(const QByteArray &data){    quint32 i = data.at(3) & 0x000000ff;    i |= ((data.at(2) << 8) & 0x0000ff00);    i |= ((data.at(1) << 16) & 0x00ff0000);    i |= ((data.at(0) << 24) & 0xff000000);    return i;}quint32 QUIHelper::byteToUIntRec(const QByteArray &data){    quint32 i = data.at(0) & 0x000000ff;    i |= ((data.at(1) << 8) & 0x0000ff00);    i |= ((data.at(2) << 16) & 0x00ff0000);    i |= ((data.at(3) << 24) & 0xff000000);    return i;}QByteArray QUIHelper::ushortToByte(ushort i){    QByteArray result;    result.resize(2);    result[1] = (uchar)(0x000000ff & i);    result[0] = (uchar)((0x0000ff00 & i) >> 8);    return result;}QByteArray QUIHelper::ushortToByteRec(ushort i){    QByteArray result;    result.resize(2);    result[0] = (uchar)(0x000000ff & i);    result[1] = (uchar)((0x0000ff00 & i) >> 8);    return result;}int QUIHelper::byteToUShort(const QByteArray &data){    int i = data.at(1) & 0x000000FF;    i |= ((data.at(0) << 8) & 0x0000FF00);    if (i >= 32768) {        i = i - 65536;    }    return i;}int QUIHelper::byteToUShortRec(const QByteArray &data){    int i = data.at(0) & 0x000000FF;    i |= ((data.at(1) << 8) & 0x0000FF00);    if (i >= 32768) {        i = i - 65536;    }    return i;}

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