如何将这些信息存储在qt中？列车员？
如何将这些信息存储在qt中？列车员？
提问于 2016-06-07 22:40:25
新蜜蜂来了。我很抱歉，如果有类似的问题，但我只是不知道如何正确地问它。问题是，我必须为大学做一些项目，现在我被困住了。我是通过udp获得信息，需要存储输出信息，以传递给对象(汽车坐标)，我必须为20个对象这样做，因此它要复杂得多。我有这段代码，它应该是我的教授。告诉我了，但我得自己想办法把它储存起来。试过QList和QMap，但我想不出怎么可能
anArraynum.posX=somenumber；
所以我必须存储每辆车的坐标，当car1.x，car1.y，car1z，然后循环计数增加；car2.x等等。
我不知道我的问题或我想问的问题是否足够清楚，但请耐心等待
while(mSocket->hasPendingDatagrams()){
QByteArray datagram;
QHostAddress crrAddress;
quint16 crrPort;
datagram.resize( int(mSocket->pendingDatagramSize()) );
mSocket->readDatagram(datagram.data(), datagram.size(), &crrAddress, &crrPort);
double* resultList = new double[(datagram.size() / int(sizeof(double))) ];
memcpy(&resultList[0], datagram.data(), size_t(datagram.size()));
for(quint16 count = 0; (count) < mVehicleCount; count++) {
mVehicleMap[mArrayOffset + count].ID = int16_t(resultList[7 + 11 * count]);
mVehicleMap[mArrayOffset + count].pose.position.x = resultList[(1 + 11 * count)];
mVehicleMap[mArrayOffset + count].pose.position.y = resultList[(2 + 11 * count)];
mVehicleMap[mArrayOffset + count].pose.position.z = resultList[(3 + 11 * count)];
mVehicleMap[mArrayOffset + count].pose.orientation.x = resultList[(6 + 11 * count)];
}
delete[] resultList;回答 1
Stack Overflow用户
回答已采纳
发布于 2016-06-08 05:36:44
您可以使用QList或QVector类来实现目标(Qt文档：QList、QVector)。
QVector的简单示例
struct Vehicle
{
qint16 ID_;
double position_x_;
double position_y_;
double position_z_;
double orintation_x_;
};
...
QVector<Vehicle> vehicles(maxVehicleCount); // maxVehicalCount - you variable
...
while(mSocket->hasPendingDatagrams()){
QByteArray datagram;
QHostAddress crrAddress;
quint16 crrPort;
datagram.resize( int(mSocket->pendingDatagramSize()) );
mSocket->readDatagram(datagram.data(), datagram.size(), &crrAddress, &crrPort);
double* resultList = new double[(datagram.size() / int(sizeof(double))) ];
memcpy(&resultList[0], datagram.data(), size_t(datagram.size()));
for(quint16 count = 0; (count) < mVehicleCount; count++) {
vehicles[mArrayOffset + count].ID_ = qint16(resultList[7 + 11 * count]);
vehicles[mArrayOffset + count].position_x_ = resultList[(1 + 11 * count)];
vehicles[mArrayOffset + count].position_y_ = resultList[(2 + 11 * count)];
vehicles[mArrayOffset + count].position_z_ = resultList[(3 + 11 * count)];
vehicles[mArrayOffset + count].orintation_x_ = resultList[(6 + 11 * count)];
}
delete[] resultList;
}您还可以使用QMap类(Qt加法：QMap)：
struct Vehicle
{
qint16 ID_;
double position_x_;
double position_y_;
double position_z_;
double orintation_x_;
};
...
QMap<qint16, Vehicle*> vehicleMap;
...
while(true/*mSocket->hasPendingDatagrams()*/){
QByteArray datagram;
QHostAddress crrAddress;
quint16 crrPort;
datagram.resize( int(mSocket->pendingDatagramSize()) );
mSocket->readDatagram(datagram.data(), datagram.size(), &crrAddress, &crrPort);
double* resultList = new double[(datagram.size() / int(sizeof(double))) ];
memcpy(&resultList[0], datagram.data(), size_t(datagram.size()));
for(quint16 count = 0; (count) < mVehicleCount; count++) {
Vehicle* vehicle = new Vehicle();
vehicle.ID_ = qint16(resultList[7 + 11 * count]);
vehicle.position_x_ = resultList[(1 + 11 * count)];
vehicle.position_y_ = resultList[(2 + 11 * count)];
vehicle.position_z_ = resultList[(3 + 11 * count)];
vehicle.orintation_x_ = resultList[(6 + 11 * count)];
vehicleMap.insert(vehicle.ID_, vehicle);
}
delete[] resultList;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37690567
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