Qt Sensors C++ 概述

// On the heap (deleted when this object is deleted)
QAccelerometer *sensor = new QAccelerometer(this);

// On the stack (deleted when the current scope ends)
QOrientationSensor orient_sensor;

// start the sensor
QSensor sensor("QAccelerometer");
sensor.start();

// later
QSensorReading *reading = sensor.reading();
qreal x = reading->property("x").value<qreal>();
qreal y = reading->value(1).value<qreal>();

QList<QSensor*>mySensorList;
for(constQByteArray&type: QSensor::sensorTypes()) {
    qDebug() << "Found a sensor type:" << type;
   for(constQByteArray&标识符: QSensor::sensorsForType(type)) {
        qDebug() << "    " << "Found a sensor of that type:" << identifier;
        QSensor*sensor= newQSensor(type, this);
        sensor->setIdentifier(identifier);
        mySensorList.append(sensor);
    }
}

for(QSensor*传感器 : mySensorList) {
    const intfirstProperty=QSensorReading::staticMetaObject.propertyOffset();
    // 若尚未调用 start()，则先连接后端
    if(!sensor->connectToBackend())
        continue;
    qDebug() << "Sensor" << sensor->identifier() << "reading properties:";
    QSensorReading*reading = sensor->reading();
    if(reading) {
        constQMetaObject*mo = 读数->metaObject();
        for(inti=firstProperty; i< mo->propertyCount();++i) {
            QByteArray name= mo->property(i).name();
            qDebug() << "    " << name << reading->property(name).toByteArray();
        }
    }
}