Qt 传感器 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 (const QByteArray &type : QSensor::sensorTypes()) {
    qDebug() << "Found a sensor type:" << type;
    for (const QByteArray &identifier : QSensor::sensorsForType(type)) {
        qDebug() << "    " << "Found a sensor of that type:" << identifier;
        QSensor* sensor = new QSensor(type, this);
        sensor->setIdentifier(identifier);
        mySensorList.append(sensor);
    }
}

for (QSensor* sensor : mySensorList) {
    const int firstProperty = QSensorReading::staticMetaObject.propertyOffset();
    // Connect to backend first in case start() hasn't been called yet
    if (!sensor->connectToBackend())
        continue;
    qDebug() << "Sensor" << sensor->identifier() << "reading properties:";
    QSensorReading *reading = sensor->reading();
    if (reading) {
        const QMetaObject *mo = reading->metaObject();
        for (int i = firstProperty; i < mo->propertyCount(); ++i) {
            QByteArray name = mo->property(i).name();
            qDebug() << "    " << name << reading->property(name).toByteArray();
        }
    }
}