By Alasdair Allan
Basic Sensors in iOS: Programming the Accelerometer, Gyroscope, and extra by way of Alasdair Allan
2011 | 106 Pages | ISBN: 1449308465 | writer: OReilly Media | PDF | 6 MB + eleven MB
What quite units the iPhone except laptops and desktops is its use of onboard sensors, together with those who are location-enabled. This concise e-book takes skilled iPhone and Mac builders on an in depth journey of iPhone and iPad via explaining how those sensors paintings, and what they're in a position to doing.
With this booklet, you'll construct pattern functions for every sensor, and study hands-on the right way to make the most of the information each one sensor produces. You'll achieve priceless adventure so you might instantly placed to paintings within your personal iOS functions for the iPhone, iPod contact, and iPad.
This e-book is helping you concentration on:
learn how you can take images and video, create video thumbnails, customise video, and keep media to the picture album
use the media picker controller and entry the iPod track library on your personal program, and permit your app to checklist and play sampled audio
write an software that makes use of this sensor to figure out gadget orientation
learn how this sensor verifies compass headings
use this framework to obtain movement info from either the accelerometer and the vibrational gyroscope
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Additional info for Basic Sensors in iOS: Programming the Accelerometer, Gyroscope, and More
Once your application loads, press the “Pick” button to bring up the pick controller again, select some songs, and press the “Done” button. Press “Play” and the music should start playing. 617 Audio[2844:707] Playing You could go on to develop the application by displaying information about the currently playing and queued songs. Let’s move on from playing existing media and look at how to play and record your own audio on the device. Recording and Playing Audio The AVAudioRecorder class is part of the AVFoundation framework and provides audio recording capabilities for an application.
Png image to be displayed in the UIImageView (see Figure 4-8). Close the Utility Pane and open the Assistant Editor. Control-click and drag from the UIImageView in your View to the arrowImage outlet in the Assistant Editor, as in Figure 4-9, and add an arrrowImage outlet. After doing so your interface file should look as below: @interface AccelerometerViewController : UIViewController
If you think about an aircraft in the sky, pushing the nose down or pulling it up modifies the pitch angle of the aircraft. However, if you keep the nose straight ahead you can also modify the roll of the aircraft using the flaps; one wing will come up, the other will go down. By keeping the wings level you can use the tail flap to change the heading (or yaw) of the aircraft, rotating it in a 2D plane. The accelerometer reports three figures: X, Y, and Z (see Figure 4-1). Acceleration values for each axis are reported directly by the hardware as G-force values.
Basic Sensors in iOS: Programming the Accelerometer, Gyroscope, and More by Alasdair Allan