© Wallace Wang 2019
Wallace WangPro iPhone Development with Swift 5https://doi.org/10.1007/978-1-4842-4944-4_10

10. Detecting Motion and Orientation

Wallace Wang1 
San Diego, CA, USA

Mobile computer devices like the iPhone and iPad essentially put a PC in your pocket, letting you use a computer wherever you happen to be. However, unlike a desktop or even a laptop PC, mobile computers can track movement and orientation. This can come in handy for tracking the user’s arm movements in a game or helping you measure angles.

To track motion and orientation, every iOS device comes with a built-in accelerometer that can detect movement. In addition to the accelerometer, the iOS devices also include a gyroscope to detect positions of the iOS device. By ...

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