http://blog.sina.com.cn/s/blog_a6fb6cc90102v617.html

Qt中可以使用qSort可以對容器排序，助手中有很多示例，大多數關於int、QString的排序，今天這裡主要講解qSort如何對結構體進行排序的。

QList list;
list << 33 << 12 << 68 << 6 << 12;
qSort(list.begin(), list.end());
// list: [ 6, 12, 12, 33, 68 ]

bool caseInsensitiveLessThan(const QString &s1, const QString &s2)
{
    return s1.toLower() < s2.toLower();
}

int doSomething()
{
    QStringList list;
    list << "AlPha" << "beTA" << "gamma" << "DELTA";
    qSort(list.begin(), list.end(), caseInsensitiveLessThan);
    // list: [ "AlPha", "beTA", "DELTA", "gamma" ]
}
 

struct BarAmount
{
    int barLevel;  //鋼筋級別
    QString diameter;  //鋼筋直徑
    double planAmount;  //計劃量
    double purchaseAmount;  //採購量
    double amount;  //總量
};

void OverdraftControl::sortBarData(QList *barDataList)
{
    qSort(barDataList->begin(), barDataList->end(), compareBarData);
}
 

bool compareBarData(const BarAmount &barAmount1, const BarAmount &barAmount2)
{
    if (barAmount1.barLevel < barAmount2.barLevel)
    {
        return true;
    }
    else if (barAmount1.barLevel > barAmount2.barLevel)
    {
        return false;
    }
    else
    {
        QString strDiameter1 = barAmount1.diameter;
        QString strDiameter2 = barAmount2.diameter;
        int nCompare = compareDiameterDescription(strDiameter1,strDiameter2);
        if (nCompare == -1)
        {
            return true;
        }
        else if (nCompare == 1)
        {
            return false;
        }
        else
        {
            return true;
        }
    }
}