This app will retrieve a barometric pressure reading from the iPhone sensor. The reading is then adjusted for elevation, also from the iPhone sensor. A line chart is displayed. A tableView of the sensor readings is presented. This works today, on my iPhone 6s plus. This will not work on a simulator as sim's lack sensors.
Thanks to: Nguyen Vu Nhat Minh on 25/8/17. https://github.com/nhatminh12369/LineChart.git
His tutorial on Medium.com: https://medium.com/@leonardnguyen/building-your-own-chart-in-ios-part-2-line-chart-7b5cfc7c866
Thanks to: Reinder, https://learnappmaking.com/pass-data-view-controllers-swift-how-to/