QCompassReading class represents one reading from a compass. 更多...
| 头： | #include <QCompassReading> |
| qmake: | QT += sensors |
| Since: | Qt 5.1 |
| 继承： | QSensorReading |
| qreal | azimuth () const |
| qreal | calibrationLevel () const |
| void | setAzimuth (qreal azimuth ) |
| void | setCalibrationLevel (qreal calibrationLevel ) |
QCompassReading class represents one reading from a compass.
The compass returns the azimuth of the device as degrees from magnetic north in a clockwise direction based on the top of the device, as defined by QScreen::nativeOrientation . There is also a value to indicate the calibration status of the device. If the device is not calibrated the azimuth may not be accurate.
Digital compasses are susceptible to magnetic interference and may need calibration after being placed near anything that emits a magnetic force. Accuracy of the compass can be affected by any ferrous materials that are nearby.
The calibration status of the device is measured as a number from 0 to 1. A value of 1 is the highest level that the device can support and 0 is the worst.
此特性保持设备的方位角。
Measured in degrees from magnetic north in a clockwise direction based on the top of the device, as defined by QPlatformScreen::nativeOrientation .
访问函数：
| qreal | azimuth () const |
另请参阅 QCompassReading 单位 .
此特性保持读取的校准级别。
度量值从 0 到 1，更高值更佳。
访问函数：
| qreal | calibrationLevel () const |
另请参阅 QCompassReading 单位 .
设置 azimuth 为设备。
另请参阅 azimuth () 和 QCompassReading 单位 .
将读取的校准级别设为 calibrationLevel .
另请参阅 calibrationLevel ().
