ReadMe.txt

### Teslameter ###
 
===========================================================================
DESCRIPTION:
 
This application implements a Teslameter, a magnetic field detector. It displays the raw x, y, and z magnetometer values, a plotted history of those values, and a computed magnitude (size or strength) of the magnetic field.
 
The use of the Core Location API for getting "heading" data is contained in the TeslameterViewController class. It creates a CLLocationManager object and uses it to get heading by invoking -[CLLocationManager startUpdatingHeading]. It implements the CLLocationManagerDelegate APIs for receiving heading and updates its user interface accordingly.
 
===========================================================================
BUILD REQUIREMENTS:
 
iOS SDK 4.0
 
===========================================================================
RUNTIME REQUIREMENTS:
 
iPhone OS 3.2 or later and iPhone 3GS or iPhone 4
Requires a device with a magnetometer. This sample will run in the Simulator but only one magnetic measurement will be received.
 
===========================================================================
PACKAGING LIST:
 
AppDelegate:
 
The application delegate, adds the main view to the window and displays the window.
 
 
TeslameterViewController:
 
A view controller that manages the primary view within the application. It creates a CLLocationManager and turns on heading updates. As updates are received, it displays them in a graph, x, y, and z labels, and also computes the magnitude (size or strength) of the magnetic vector. The units for all values are microteslas.
 
 
GraphView:
 
A custom view for plotting history of x, y, and z magnetic values.
 
===========================================================================
CHANGES FROM PREVIOUS VERSIONS:
 
Version 1.2
- Updated to work with iOS 4.0.
 
Version 1.1
- Minor post-WWDC clean-up
 
Version 1.0
- First version.
 
===========================================================================
Copyright (C) 2009-2010 Apple Inc. All rights reserved.