這一部分我想詳細(xì)地展開敘述张症，因?yàn)樽约涸趯?shí)現(xiàn)這個(gè)功能上確實(shí)是下了很大的功夫，最后卻幾乎一無所獲鸵贬，導(dǎo)致自己的體會(huì)非常深刻俗他，讓我認(rèn)識(shí)到了自己的才疏學(xué)淺以及眼高手低的毛病，當(dāng)然阔逼，針對(duì)此功能兆衅，我最大的認(rèn)識(shí)就是，一個(gè)你未曾嘗試實(shí)現(xiàn)過的功能嗜浮，決不能輕易地下手編寫代碼羡亩，這不僅是對(duì)軟件的不尊重，更是對(duì)自己精力危融、甚至生命的一種不尊重畏铆，當(dāng)你費(fèi)了很大功夫完成一半的功能時(shí)，你發(fā)現(xiàn)下一個(gè)功能根本沒法在現(xiàn)有基礎(chǔ)上添加時(shí)吉殃，你會(huì)崩潰的辞居。
因此，對(duì)一個(gè)新的功能蛋勺，有一個(gè)很好的頂層設(shè)計(jì)瓦灶，以及對(duì)全局的思考是至關(guān)重要的，決不能眼高手低抱完，盲目下手編寫代碼贼陶，到頭來一定是手忙腳亂，發(fā)現(xiàn)自己的垃圾代碼確實(shí)是一無是處巧娱。同時(shí)碉怔，善于參考借鑒別人的思想也不是一件壞事，當(dāng)然了禁添，有自己的思想最好眨层，但大部分的時(shí)間理應(yīng)放在你自己這個(gè)思想的可行性上，而不是無效的代碼編寫上荡！

個(gè)人失敗案例

未經(jīng)過充分的考慮以及判斷趴樱，我盲目的開始了動(dòng)畫效果的代碼編寫，當(dāng)時(shí)的想法是酪捡，我一定要盡快實(shí)現(xiàn)當(dāng)前旅客的動(dòng)畫狀態(tài)顯示功能（因?yàn)楫?dāng)時(shí)還沒有添加多個(gè)旅客叁征，實(shí)現(xiàn)多個(gè)旅客的旅行，即狀態(tài)查詢）逛薇，因此我未經(jīng)思考地開始了一個(gè)旅客的該功能實(shí)現(xiàn)捺疼，我將這部分代碼也放在widget模塊中，因?yàn)槔L圖就是在widget中實(shí)現(xiàn)的永罚。
實(shí)現(xiàn)方法：
1啤呼、查詢旅行方案并點(diǎn)擊確定后卧秘，算法得出旅客的旅行信息；
2官扣、將該信息轉(zhuǎn)化為一行字符串翅敌，傳遞給widget中；
3惕蹄、widget監(jiān)控子窗口中何時(shí)點(diǎn)擊了確定蚯涮，點(diǎn)擊時(shí)進(jìn)入移動(dòng)乘客的函數(shù)，并根據(jù)當(dāng)前時(shí)間較之旅客出發(fā)時(shí)間來判斷他現(xiàn)在應(yīng)處于什么狀態(tài)（停留卖陵、運(yùn)動(dòng)遭顶、還是到達(dá)狀態(tài)）
4、針對(duì)如何實(shí)現(xiàn)停留泪蔫，我產(chǎn)生了思考棒旗，如何讓該乘客的狀態(tài)保持在當(dāng)前一段時(shí)間（即停留這張圖片繪制在地圖上幾“小時(shí)”），我決定采用sleep的方式撩荣，直接根據(jù)參數(shù)sleep一定時(shí)間嗦哆；
5、針對(duì)如何實(shí)現(xiàn)運(yùn)動(dòng)婿滓，我參考了example中別人移動(dòng)乘客的算法老速，見附1，雖然實(shí)現(xiàn)了高幀率運(yùn)動(dòng)（如60幀）凸主，但是每兩幀之間的時(shí)間又如何停止呢橘券？（不停止的話，函數(shù)直接執(zhí)行完卿吐，即圖像直接繪制完旁舰，根本看不到運(yùn)動(dòng)效果），我又采用了sleep嗡官；
最后效果：完全ok箭窜，非常完美，單個(gè)乘客的運(yùn)動(dòng)效果完全達(dá)到需求衍腥。

而后磺樱，問題接踵而至，要求必須實(shí)現(xiàn)多個(gè)乘客同時(shí)在旅行系統(tǒng)中進(jìn)行查詢婆咸，并同時(shí)保存他們的狀態(tài)竹捉，并可以實(shí)現(xiàn)隨時(shí)切換，我面臨著如何實(shí)現(xiàn)保存旅客當(dāng)前位置尚骄，并根據(jù)該位置在切換回時(shí)再推算出旅客此時(shí)所在的位置并進(jìn)行移動(dòng)块差，事實(shí)上，根據(jù)我先前設(shè)計(jì)的算法，我認(rèn)為這一功能根本無法實(shí)現(xiàn)憨闰。以下是我的LJ代碼（可跳過）：
（大致思想就是切換旅客時(shí)状蜗，我判斷當(dāng)前他應(yīng)該是停留狀態(tài)還是運(yùn)動(dòng)狀態(tài)，若是停留狀態(tài)鹉动，再停留一段時(shí)間轧坎，進(jìn)入循環(huán)進(jìn)行當(dāng)次運(yùn)動(dòng)，最后進(jìn)入主循環(huán)進(jìn)行剩余城市間的停留和運(yùn)動(dòng)训裆；若是運(yùn)動(dòng)狀態(tài)，則找出他應(yīng)該從哪兒開始運(yùn)動(dòng)蜀铲，進(jìn)入循環(huán)進(jìn)行當(dāng)次運(yùn)動(dòng)边琉，最后進(jìn)入主循環(huán)進(jìn)行剩余城市間的停留和運(yùn)動(dòng)）

//移動(dòng)旅客，在地圖上顯示其位置及當(dāng)前狀態(tài)
void Widget::moveTraveler()
{
    int j = 0,k = 0;
    i = 0;
    qDebug()<<"how many times i come";
    while(paintFlag != 0)
    {
        starttime = QDateTime::currentDateTime();//獲取開始時(shí)間
        qDebug()<<"starttime = "<<starttime;
        if(k == 0)
            map[now_traveler]->begintime = starttime;
//        qDebug()<<begintime;
        GetHowToMove();

        travelerStatus = 1;
        QWidget::repaint();
        sleep(stay_time * 10000);
        //sleep(1000);

        travelerStatus = 2;

        for(int i = 1;i != time*1000/SPEED;i++,j++)
        {
            if(i == 1&&j == 0)
            {
                departuredatetime = QDateTime::currentDateTime();//獲取離開的時(shí)間
                cityarrivaltime = departuredatetime.addSecs(time);//獲取到達(dá)的時(shí)間
                start2Begin = getSplitTime(starttime, departuredatetime);
                start2End = getSplitTime(starttime, cityarrivaltime);
//                qDebug()<<departuredatetime<<cityarrivaltime;
            }
            repaint();
            sleep(SPEED);
            if(increaseRatio >= 1)
                break;
        }
        j = 0;k++;
    }
    travelerStatus = 3;
    repaint();
    travelerStatus = 0;
    paintFlag = 1;
}
void Widget::moveTraveler2()
{
    QDateTime begintimeinthis;
    begintimeinthis = map[now_traveler]->begintime;
    qDebug()<<"begintimeinthis = "<<begintimeinthis;

    int sub = (int)getTimeDifference(begintimeinthis,ctime);
    qDebug()<<sub;
    int wheretobegin = sub/10000;
    int sum = 0;
    for(int i = 0;;i++) {                    ******剪枝掉不需要的字符
        qDebug()<<StrFromTra;
        int timebetween2city = StrFromTra.section("-",1,1).toInt()+StrFromTra.section("-",3,3).toInt();
        qDebug()<<timebetween2city;
       if(timebetween2city * 10000 < sub && timebetween2city != 0)
       {
           qDebug()<<StrFromTra.section("-",1,1).toInt()+StrFromTra.section("-",3,3).toInt();
           sum += StrFromTra.section("-",1,1).toInt()+StrFromTra.section("-",3,3).toInt();
           int num = 0;
           for(int j = 0;j < 4;j++)
               num += StrFromTra.section("-",j,j).length() + 1;
           StrFromTra = StrFromTra.mid(num);

           sub -= timebetween2city * 10000;
       }
       else {
           break;
       }
    }
    begintimeinthis = begintimeinthis.addSecs(sum * 10);
    sub = (int)getTimeDifference(begintimeinthis,ctime);
    wheretobegin = sub/10000;
    qDebug()<<"sub = "<<sub<<"wheretobegin = "<<wheretobegin;

    qDebug()<<"strFromTra = "<<StrFromTra;

    int total = 0;
    for(int i = 1;StrFromTra.section("-",i,i) != nullptr;i += 2)
    {
        total += StrFromTra.section("-",i,i).toInt();
    }
    qDebug()<<"total = "<<total;
    if(wheretobegin >= total)//若返回的時(shí)間大于總時(shí)間
    {
        dest2 = CityToNum(StrFromTra);
        qDebug()<<"dest2 = "<<dest2;
        travelerStatus = 3;
        repaint();
        travelerStatus = 0;
        paintFlag = 0;
    }

    if(wheretobegin < StrFromTra.section("-",1,1).toInt())******若返回的時(shí)間處于停留時(shí)間內(nèi)
    {
        travelerStatus = 1;
        depart2 = CityToNum(StrFromTra.section("-",0,0));
        update();
        sleep(StrFromTra.section("-",1,1).toInt() * 10000 - sub);//停留

        int j = 0;
        travelerStatus = 2;

        for(int i = 1;i != time*1000/SPEED;i++,j++)//運(yùn)動(dòng)
        {
            if(i == 1&&j == 0)
            {
                departuredatetime = QDateTime::currentDateTime();//獲取離開的時(shí)間
                cityarrivaltime = departuredatetime.addSecs(StrFromTra.section("-",3,3).toInt() * 10);//獲取到達(dá)的時(shí)間
                start2Begin = getSplitTime(starttime, departuredatetime);
                start2End = getSplitTime(starttime, cityarrivaltime);
//                qDebug()<<departuredatetime<<cityarrivaltime;
            }
            repaint();
            sleep(SPEED);
            if(increaseRatio >= 1)
                break;
        }
        j = 0;
    }
    else {//若返回的時(shí)間應(yīng)處于運(yùn)動(dòng)狀態(tài)
        depart2 = CityToNum(StrFromTra.section("-",0,0));

        int i = 0;
        double j;
        for(j = 0;j/(time*1000/SPEED) < getTimeDifference(begintimeinthis.addSecs(10 * StrFromTra.section("-",1,1).toInt()),ctime)
            (StrFromTra.section("-",3,3).toDouble() * 10000);j++,i++);******找到應(yīng)該從哪兒開始運(yùn)動(dòng)
        i = (int)j;
        qDebug()<<"i = "<<i;
        travelerStatus = 2;

        for(int j = 0;i != time*1000/SPEED;i++,j++)
        {
            if(j == 0)
            {
                departuredatetime = begintimeinthis.addSecs(StrFromTra.section("-",1,1).toInt() * 10);//獲取離開的時(shí)間
                cityarrivaltime = begintimeinthis.addSecs(StrFromTra.section("-",1,1).toInt() * 10 + StrFromTra.section("-",3,3).toInt() * 10);//獲取到達(dá)的時(shí)間

                start2Begin = getSplitTime(starttime, departuredatetime);
                start2End = getSplitTime(starttime, cityarrivaltime);
//                qDebug()<<departuredatetime<<cityarrivaltime;
            }
            repaint();
            sleep(SPEED);
            if(increaseRatio >= 1)
                break;
        }
        j = 0;
    }
    int num = 0;
    if(StrFromTra.section("-",1,1) != nullptr)
    {
        for(int j = 0;j < 4;j++)
            num += StrFromTra.section("-",j,j).length() + 1;
        StrFromTra = StrFromTra.mid(num);
        qDebug()<<"StrFromTra = "<<StrFromTra;
    }

    GetHowToMove();
    if(paintFlag == 0)
        dest2 = CityToNum(StrFromTra);

    int j = 0;
    while(paintFlag != 0)  ******開始剩余的幾個(gè)城市間正常的停留和運(yùn)動(dòng)
    {
//        starttime = QDateTime::currentDateTime();//獲取開始時(shí)間
//        qDebug()<<starttime;

        travelerStatus = 1;
        QWidget::repaint();
        sleep(stay_time * 10000);
        qDebug()<<"I sleep.";
        //sleep(1000);

        travelerStatus = 2;

        for(int i = 1;i != time*1000/SPEED;i++,j++)
        {
            if(i == 1&&j == 0)
            {
                departuredatetime = QDateTime::currentDateTime();//獲取離開的時(shí)間
                cityarrivaltime = departuredatetime.addSecs(time);//獲取到達(dá)的時(shí)間
                start2Begin = getSplitTime(starttime, departuredatetime);
                start2End = getSplitTime(starttime, cityarrivaltime);
//                qDebug()<<departuredatetime<<cityarrivaltime;
            }
            repaint();
            sleep(SPEED);
            if(increaseRatio >= 1)
                break;
        }
        qDebug()<<"I run.";
        j = 0;

        if(!GetHowToMove())
            break;
        qDebug()<<"i = "<<i;
    }
    travelerStatus = 3;
    paintFlag = 0;
    repaint();
    travelerStatus = 0;
    paintFlag = 1;
}
//獲取當(dāng)前輪次旅客從某出發(fā)地移動(dòng)至相應(yīng)目的地的信息
int Widget::GetHowToMove()
{
    paintFlag = 1;
//    qDebug()<<"StrFromTra = "<<StrFromTra;

    QString depart = StrFromTra .section("-",4*i,4*i);
    QString dest = StrFromTra.section("-",4*i+4,4*i+4);
    if(dest==nullptr)
    {
        i = -1;
        paintFlag = 0;
    }
    stay_time = StrFromTra.section("-",4*i+1,4*i+1).toInt();
    vehicle = StrFromTra.section("-",4*i+2,4*i+2);
    time = StrFromTra.section("-",4*i+3,4*i+3).toInt();
    time = time * 10;
    qDebug()<<depart<<stay_time<<vehicle<<time<<dest;

    depart2 = CityToNum(depart);
    dest2 = CityToNum(dest);

    i++;

    if(dest == nullptr)
        return 0;
    else {
        return 1;
    }
}

當(dāng)正常點(diǎn)擊確定時(shí)记劝，調(diào)用movetraveler()函數(shù)变姨，切換旅客時(shí)調(diào)用movetraveler2()函數(shù)，姑且先不提我這個(gè)想法是不是bug很難調(diào)厌丑，想法簡單定欧，但代碼龐大且效率奇低，單是我在寫代碼時(shí)我就感到了深深的無力感怒竿，可是我依然硬著頭皮寫了好多天砍鸠，發(fā)現(xiàn)莫名其妙的bug讓我無所適從，最后發(fā)現(xiàn)問題所在：信號(hào)與槽的機(jī)制耕驰，槽內(nèi)調(diào)用函數(shù)時(shí)還沒有執(zhí)行完（因?yàn)橛衧leep函數(shù)）爷辱，就要切換旅客進(jìn)入下一個(gè)函數(shù)（movetraveler2）,其內(nèi)也有sleep函數(shù)，若打斷函數(shù)1后去執(zhí)行函數(shù)2朦肘，當(dāng)函數(shù)2執(zhí)行完后又會(huì)返回到函數(shù)1繼續(xù)執(zhí)行饭弓，雖然初衷是徹底打斷函數(shù)1，只執(zhí)行函數(shù)2 媒抠，但connect機(jī)制如此弟断，無法改變，網(wǎng)上也沒有相關(guān)資料趴生，因此堅(jiān)持了好多天的思想阀趴，一朝徹底放棄，確實(shí)很不容易苍匆，因?yàn)檫@就像是壯士斷腕舍咖，更何況臨近ddl，害怕自己重頭來過沒法趕完這個(gè)功能锉桑。
就是因?yàn)槲译S意使用sleep函數(shù)以及將調(diào)用其的函數(shù)放在槽內(nèi)排霉，導(dǎo)致了這個(gè)很難解決的問題，最終發(fā)現(xiàn)功能根本無法實(shí)現(xiàn)，真的非常痛苦攻柠。前車之鑒球订，希望大家不要像我一樣，對(duì)待一件事情瑰钮，一定實(shí)現(xiàn)做好頂層的設(shè)計(jì)與所有情況的考慮冒滩。

正確實(shí)現(xiàn)的功能：
（首先要考慮的是，不把正常點(diǎn)擊確定以及切換旅客割離開來浪谴，不管是哪種調(diào)用开睡，都只是改變了當(dāng)前顯示在地圖上的旅客的信息而已，這樣的需求下苟耻，問題就鞥呢迎刃而解）
1篇恒、封裝mapwidget類，widget窗口上添加一個(gè)widget控件并提升為mapwidget凶杖，在該控件中實(shí)現(xiàn)所有的重繪操作胁艰，包括地圖繪制。
2智蝠、mapwidget類中腾么，構(gòu)造函數(shù)中打開一個(gè)定時(shí)器，一直不斷地重復(fù)刷新重繪工作杈湾。
3解虱、若當(dāng)前旅客沒有進(jìn)行過查詢操作，將某參數(shù)設(shè)為-1，mapwidget中監(jiān)測(cè)該值，為-1時(shí)不繪制旅客狀態(tài)圖片茎辐；
4、當(dāng)旅客在一次旅行中時(shí)艰匙，將其出發(fā)時(shí)間、到達(dá)時(shí)間等信息存在struct traveler結(jié)構(gòu)體中抹恳，mapwidget隨時(shí)監(jiān)測(cè)员凝，并根據(jù)相應(yīng)的值繪制旅客狀態(tài)；
以下為代碼：

//mapwidget.h
#ifndef MAPWIDGET_H
#define MAPWIDGET_H

#include "widget.h"

#include <QWidget>
#include <QTextEdit>
#include <QBrush>
#include <QPalette>
#include <QPixmap>
#include <QPen>
#include <QDebug>
#include <QRectF>
#include <QDateTime>
#include <QPointF>
#include <QMessageBox>
#include <QTimer>
#include <QThread>

class mapwidget : public QWidget
{
public:
    mapwidget(QWidget *);
    void paintEvent(QPaintEvent *);
    QPixmap setPointGraph();//設(shè)置圖標(biāo)
    QPointF setPointPos();//設(shè)置圖標(biāo)位置
    QDateTime getSplitTime(QDateTime former, QDateTime later);//獲取兩時(shí)間點(diǎn)時(shí)間間隔
    QPointF getCityCor(int city);//獲得城市對(duì)應(yīng)坐標(biāo)
    double getTimeDifference(QDateTime shorterDateTime, QDateTime longerDateTime);//獲得兩時(shí)間間隔時(shí)間差
    QPointF getMoveDistance(QDateTime starttime, QDateTime spentTime, QDateTime start2Begin, QDateTime start2End,
                            int from, int to);//獲得坐標(biāo)增量
    int nextCity();//獲得新計(jì)劃的始發(fā)地
    int CityToNum(QString);
    int VehicleToNum(QString);

private slots:
    void update();//刷新畫面
private:
    int state;
    QTimer * paintmstimer;
};

#endif // MAPWIDGET_H





//mapwidget.cpp
#include "mapwidget.h"

#include <QApplication>
#include <QStateMachine>
#include <QPushButton>
#include <QSignalTransition>
#include <QPropertyAnimation>
#include <QPainter>
#include <QState>
#include <QLabel>

//添加新的timer奋献，使得繪圖準(zhǔn)確
mapwidget::mapwidget(QWidget *parent) :
    QWidget(parent),state(-1)
{
    this->setAutoFillBackground(true);

    qDebug()<<"come mapwidget";

    paintmstimer = new QTimer;
    paintmstimer->start(1000/60);
    QObject::connect(paintmstimer, SIGNAL(timeout()), this, SLOT(update()));
}

//繪圖實(shí)踐健霹，繪制旅行過程
void mapwidget::paintEvent(QPaintEvent *)
{
    //設(shè)置一個(gè)畫家 叫painter1
    QPainter painter1(this);

    //繪制地圖map2
    QPixmap pix;
    pix.load(":/map2.png");
    pix = pix.scaled(pix.width()*0.55,pix.height()*0.55);
    painter1.drawPixmap(0,150,pix);
    QPainter painter(this);
    Widget *fatherPtr = (Widget *)parentWidget();
    if (fatherPtr->tra.currenttraveler != -1)
    {
        painter.drawPixmap((setPointPos()), setPointGraph());
    }
}

//根據(jù)當(dāng)前狀態(tài)、交通方式?jīng)Q定圖標(biāo)
QPixmap mapwidget::setPointGraph()
{
    QPixmap pointGraph;
    switch(state)
    {
    case -2://arrived destination
        pointGraph = QPixmap(":/vehicles/arrive.ico");
        break;
    case -1://pause waiting
        pointGraph = QPixmap(":/vehicles/pause.ico");
        break;
    case 0:
        pointGraph = QPixmap(":/vehicles/car.ico");
        break;
    case 1:
        pointGraph = QPixmap(":/vehicles/train.ico");
        break;
    case 2:
        pointGraph = QPixmap(":/vehicles/plane.ico");
        break;
    }

    return pointGraph;
}

//設(shè)置當(dāng)前圖標(biāo)所處位置
QPointF mapwidget::setPointPos()
{
    Widget *fatherPtr = (Widget *)parentWidget();
    static QPointF pointPos;
//    std::vector<Attribute> path = fatherPtr->travelers[fatherPtr->currentTraveler].getPlan();
    QDateTime spenttime = QDateTime::currentDateTime();
    QDateTime starttime = fatherPtr->tra.starttime;
    QDateTime totaltime = fatherPtr->tra.totaltime;
    QString plan = fatherPtr->tra.plan;

    //將字符串Plan剪短為需要的串
    int sub = (int)getTimeDifference(starttime,spenttime);
    int sum = 0;
    for(int i = 0;;i++) {
        int timebetween2city = plan.section("-",1,1).toInt()+plan.section("-",3,3).toInt();
       if(timebetween2city * 10000 < sub && timebetween2city != 0)
       {
//           qDebug()<<plan.section("-",1,1).toInt()+plan.section("-",3,3).toInt();
           sum += plan.section("-",1,1).toInt()+plan.section("-",3,3).toInt();
           int num = 0;
           for(int j = 0;j < 4;j++)
               num += plan.section("-",j,j).length() + 1;
           plan = plan.mid(num);
           sub -= timebetween2city * 10000;
       }
       else {
           break;
       }
    }
//    qDebug()<<"plan = "<<plan;

    //已用時(shí)間不小于總時(shí)間瓶蚂，當(dāng)前位置為目的地
    if(spenttime >= totaltime)
    {
            for(int j = 0;plan.section("-",1,1) != nullptr;j++)
            {
                int num = plan.section("-",0,0).length() + 1;
                plan = plan.mid(num);
            }
//            qDebug()<<"plan = "<<plan;

         pointPos = getCityCor(CityToNum(plan));
         state = -2;
    }
    else
        while(1)
        {
            QDateTime departuredatetime = starttime.addSecs(sum * 10 + plan.section("-",1,1).toInt()* 10);
            QDateTime cityarrivaltime = departuredatetime.addSecs(plan.section("-",3,3).toInt() * 10);
            QDateTime start2Begin = getSplitTime(starttime, departuredatetime);
            QDateTime start2End = getSplitTime(starttime, cityarrivaltime);
            //已用時(shí)間不超過一段路徑發(fā)車時(shí)間糖埋，狀態(tài)為等待
//            qDebug()<<getTimeDifference(starttime,spenttime)<<getTimeDifference(starttime,departuredatetime);
            if (getSplitTime(starttime,spenttime) <= start2Begin)
            {
                pointPos = getCityCor(CityToNum(plan.section("-",0,0)));
                state = -1;
                break;
            }
            //已用時(shí)間不超過一段路徑的到站時(shí)間，狀態(tài)為運(yùn)動(dòng)中
            else if (getSplitTime(starttime,spenttime) <= start2End)
            {
                pointPos = getCityCor(CityToNum(plan.section("-",0,0)));
                pointPos += getMoveDistance(starttime,spenttime, start2Begin, start2End, CityToNum(plan.section("-",0,0)), CityToNum(plan.section("-",4,4)));
                state = VehicleToNum(plan.section("-",2,2));
                if (spenttime == start2End)
                {
                    qDebug() << "Arriving at " << plan.section("-",4,4);
                }
                break;
            }
        }
    return pointPos;
}


//獲得兩時(shí)間點(diǎn)之間的時(shí)間差窃这，判斷當(dāng)前所處的狀態(tài)
QDateTime mapwidget::getSplitTime(QDateTime former, QDateTime later)
{
    int durationMsec = (later.time().msec() -  former.time().msec());
    int durationSec = (later.time().second() - former.time().second() - (int)((durationMsec >= 0)?0:1));
    int durationMin = (later.time().minute() - former.time().minute() - (int)((durationSec >= 0)?0:1));
    int durationHour = (later.time().hour() - former.time().hour() - (int)((durationMin >= 0)?0:1));
    int durationDay = (later.date().day() - former.date().day() - (int)((durationHour >= 0)?0:1) + former.date().daysInMonth())
            % former.date().daysInMonth();
    durationMsec = (durationMsec + 1000) % 1000;
    durationSec = (durationSec + 60) % 60;
    durationMin = (durationMin + 60) % 60;
    durationHour = (durationHour + 24) % 24;

    return QDateTime(QDate(1, 1, durationDay+1), QTime(durationHour, durationMin, durationSec, durationMsec));
}

//獲得兩個(gè)時(shí)間段的時(shí)間差瞳别，用于計(jì)算坐標(biāo)增量
double mapwidget::getTimeDifference(QDateTime former, QDateTime later)
{
    int durationMsec = (later.time().msec() - former.time().msec());
    int durationSec = (later.time().second() - former.time().second() - (int)((durationMsec >= 0)?0:1));
    int durationMin = (later.time().minute() - former.time().minute() - (int)((durationSec >= 0)?0:1));
    int durationHour = (later.time().hour() - former.time().hour() - (int)((durationMin >= 0)?0:1));
    int durationDay = (later.date().day() - former.date().day() - (int)((durationHour >= 0)?0:1) + former.date().daysInMonth())
            % former.date().daysInMonth();
    durationMsec = (durationMsec + 1000) % 1000;
    durationSec = (durationSec + 60) % 60;
    durationMin = (durationMin + 60) % 60;
    durationHour = (durationHour + 24) % 24;

    return (double)(1000 * (durationDay * 86400 + durationHour * 3600 + durationMin * 60 + durationSec) +durationMsec);
}

//計(jì)算坐標(biāo)增量
QPointF mapwidget::getMoveDistance(QDateTime starttime, QDateTime spentTime, QDateTime start2Begin, QDateTime start2End,
                                   int from, int to)
{
//    qDebug()<<start2Begin<<start2End<<spentTime;
    double increaseRatio = getTimeDifference(start2Begin, getSplitTime(starttime,spentTime))/getTimeDifference(start2Begin, start2End);
    double xIncrease = (getCityCor(to) - getCityCor(from)).x() * increaseRatio;
    double yIncrease = (getCityCor(to) - getCityCor(from)).y() * increaseRatio;

    return QPointF(xIncrease, yIncrease);
}

總結(jié)

快速的編碼是我們要掌握的技能要求之一，但快速編寫垃圾代碼的能力一定不是。思考永遠(yuǎn)要放在第一位祟敛，但思考的內(nèi)容也是重點(diǎn)疤坝，對(duì)全局的思考，對(duì)整個(gè)程序馆铁，整個(gè)軟件功能的思考才是重中之重跑揉！