June 2011
Intermediate to advanced
590 pages
19h 31m
English
Content preview from iOS Programming: The Big Nerd Ranch Guide, Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Orientation and Scale of Acceleration
The device’s acceleration is measured in Gs. 1G is the force due to the earth’s gravity. (When the device is still, the accelerometer doesn’t know if it is moving at a constant velocity in the earth’s gravity well or if it is far out in space and accelerating upwards at 9.8 meters per second every second.)
While the application is running, hold the device vertically in front of your face as if you were using it. Check the console: the y-component of the acceleration is approximately -1, and the x- and z-components are approximately 0. If you lay the device on its back, the z-component of the acceleration is approximately -1, and the others are approximately 0. If you balance the device on the edge with the ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.