Demonstrates the usage of all available iOS sensors with source code. Example use-cases are a compass, air level, navigation, acceleration and audio recording and playback.

1. 100
iOS Sensors
Where Mobile Begins

2. Roadmap 100
Roadmap
Where We’re Going

3. Teaser: What to Expect! 96
Teaser
What to Expect!

4. Teaser: What to Expect! 96
Teaser
What to Expect!
Digital Camera

5. Teaser: What to Expect! 96
Teaser
What to Expect!
Audio Sampler
Digital Camera

6. Teaser: What to Expect! 96
Teaser
What to Expect!
Navigation System
Audio Sampler
Digital Camera

7. Teaser: What to Expect! 96
Teaser
What to Expect!
Air Level
Navigation System
Audio Sampler
Digital Camera

8. Teaser: What to Expect! 96
Teaser
What to Expect!
Ball Game
Air Level
Navigation System
Audio Sampler
Digital Camera

9. Teaser: What to Expect! 96
Teaser
What to Expect!
Compass
Ball Game
Air Level
Navigation System
Audio Sampler
Digital Camera

10. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference

11. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference
Speakers Speakers

12. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference
Speakers Speakers
Microphone Microphone

13. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference
Speakers Speakers
Microphone Microphone
Camera Camera

14. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference
Speakers Speakers
Microphone Microphone
Camera Camera
GPS

15. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference
Speakers Speakers
Microphone Microphone
Camera Camera
GPS
Accelerometer

16. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference
Speakers Speakers
Microphone Microphone
Camera Camera
GPS
Accelerometer
Gyroscope

17. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference
Speakers Speakers
Microphone Microphone
Camera Camera
GPS
Accelerometer
Gyroscope
Magnetometer

18. Mobile vs. Desktop: What’s the Difference 92
Mobile vs. Desktop
What’s the Difference
Speakers Speakers
Microphone Microphone
Camera Camera
GPS
Accelerometer
Mobile Sensors
Gyroscope
Magnetometer

19. Sensors in 12 Device Generations 88
Sensors in Device Generations
Great Common Denominators
With iPod
All 12 Generations - 2007+ Without iPod

20. Sensors in 12 Device Generations 88
Sensors in Device Generations
Great Common Denominators
With iPod
All 12 Generations - 2007+ Without iPod
100.00%
75.00%
50.00%
25.00%
0%
Speaker Microphone Accelerometer GPS Camera Gyroscope Magnetometer

21. Sensors in 7 Device Generations 84
Sensors in Device Generations
Great Common Denominators
With iPod
Latest 7 Generations - 2010+ Without iPod
100.00%
75.00%
50.00%
25.00%
0%
Speaker Microphone Accelerometer GPS Camera Gyroscope Magnetometer

22. Sensors in 7 Device Generations 84
Sensors in Device Generations
Great Common Denominators
With iPod
Latest 7 Generations - 2010+ Without iPod
100.00%
75.00%
50.00% Majority
25.00%
0%
Speaker Microphone Accelerometer GPS Camera Gyroscope Magnetometer

23. Delegate Pattern 80
Delegate Pattern
Quick Look

24. Delegate Pattern 80
Delegate Pattern
Quick Look
Delegate

25. Delegate Pattern 80
Delegate Pattern
Quick Look
Delegate
didArriveAtBar:
didDrinkBeerNumber:
didUpdateAlcoholLevel:
wantsMeToComeHome:
didCallCab:
didEnterCab:
didExitCab:

26. Roadmap 76
Roadmap
Where We’re Going

27. Light: Implementing a Camera 72
Light
Implementing a Camera

28. Light: Implementing a Camera 72
Light
Implementing a Camera
// setup image picker controller
imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.allowsEditing = NO;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.delegate = self;
// display
[viewController presentModalViewController:imagePickerController animated:YES];
// grab photo as soon as it was taken
-(void) imagePickerController:(UIImagePickerController *)picker /
didFinishPickingMediaWithInfo:(NSDictionary *)info{
// captured image
UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
// dismiss image picker
[viewController dismissModalViewControllerAnimated:YES];
}

29. Light: Implementing a Camera 72
Light
Implementing a Camera
// setup image picker controller
imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.allowsEditing = NO;
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePickerController.delegate = self;
// display
Camera Demo
[viewController presentModalViewController:imagePickerController animated:YES];
// grab photo as soon as it was taken
-(void) imagePickerController:(UIImagePickerController *)picker /
didFinishPickingMediaWithInfo:(NSDictionary *)info{
// captured image
UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
// dismiss image picker
[viewController dismissModalViewControllerAnimated:YES];
}

30. Sound: Implementing a Sound Recorder 68
Sound
Implementing a Sound Recorder

31. Sound: Implementing a Sound Recorder 68
Sound
Implementing a Sound Recorder
// get audio session
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryRecord error:nil];
[audioSession setActive:YES error:nil];
// some settings
NSMutableDictionary *settings = [[NSMutableDictionary alloc] init];
[settings setValue:[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
[settings setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[settings setValue:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey];
tmpRecording = [NSURL fileURLWithPath:[NSTemporaryDirectory() /
stringByAppendingPathComponent:@"recording.caf"]];
// start recording
audioRecorder = [[AVAudioRecorder alloc] initWithURL:tmpRecording settings:settings
error:nil];
[audioRecorder setDelegate:self];
[audioRecorder prepareToRecord];
[audioRecorder recordForDuration:2.0];
// do when recording is finished
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{
isRecording = NO;
}

32. Sound: Implementing a Sound Player 64
Sound
Implementing a Sound Player

33. Sound: Implementing a Sound Player 64
Sound
Implementing a Sound Player
// get audio session
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
[audioSession setActive:YES error:nil];
tmpRecording = [NSURL fileURLWithPath:[NSTemporaryDirectory() /
stringByAppendingPathComponent:@"recording.caf"]];
// start playing
AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:tmpRecording
error:nil];
[player setDelegate:self];
[player prepareToPlay];
[player play];
// do when recording is finished
- (void)audioRecorderDidFinishPlaying:(AVAudioRecorder *)recorder successfully:
(BOOL)flag{
isPlaying = NO;
}

34. Sound: Implementing a Sound Player 64
Sound
Implementing a Sound Player
// get audio session
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
[audioSession setActive:YES error:nil];
Sound Demo
tmpRecording = [NSURL fileURLWithPath:[NSTemporaryDirectory() /
stringByAppendingPathComponent:@"recording.caf"]];
// start playing
AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:tmpRecording
error:nil];
[player setDelegate:self];
[player prepareToPlay];
[player play];
// do when recording is finished
- (void)audioRecorderDidFinishPlaying:(AVAudioRecorder *)recorder successfully:
(BOOL)flag{
isPlaying = NO;
}

35. Location: Implementing a Positioning System 60
Location
Implementing a Positioning System

36. Location: Implementing a Positioning System 60
Location
Implementing a Positioning System
// create location manager
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
// start location update
[locationManager startUpdatingLocation];
// process position
-(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation{
// access position
float latitude = newLocation.coordinate.latitude;
float longitude = newLocation.coordinate.longitude;
// one position is enough
[locationManager stopUpdatingLocation];
}

37. Location: Implementing a Positioning System 60
Location
Implementing a Positioning System
// create location manager
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
Positioning Demo
// start location update
[locationManager startUpdatingLocation];
// process position
-(void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation{
// access position
float latitude = newLocation.coordinate.latitude;
float longitude = newLocation.coordinate.longitude;
// one position is enough
[locationManager stopUpdatingLocation];
}

38. Magnetic Field: Implementing a Compass 56
Magnetic Field
Implementing a Compass

39. Magnetic Field: Implementing a Compass 56
Magnetic Field
Implementing a Compass
// setup location manager
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
[locationManager startUpdatingHeading];
// receive update of heading
-(void)locationManager:(CLLocationManager *)manager
didUpdateHeading:(CLHeading *)newHeading{
// device is pointing ‘heading’ away from north
float heading = manager.heading.magneticHeading;
}

40. Magnetic Field: Implementing a Compass 56
Magnetic Field
Implementing a Compass
// setup location manager
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
Compass Demo
[locationManager startUpdatingHeading];
// receive update of heading
-(void)locationManager:(CLLocationManager *)manager
didUpdateHeading:(CLHeading *)newHeading{
// device is pointing ‘heading’ away from north
float heading = manager.heading.magneticHeading;
}

41. Roadmap 52
Roadmap
Where We’re Going

42. Accelerometer: May the Force be with you 48
Accelerometer
May the Force be with you

43. Accelerometer: May the Force be with you 48
Accelerometer
May the Force be with you
Force
in g-force
-1.0
0.0
0.0

44. Accelerometer: May the Force be with you 48
Accelerometer
May the Force be with you
Force Rotation
in g-force in degrees
-1.0
0.0
0.0 -0.5
0.0
0.5

45. Accelerometer: May the Force be with you 48
Accelerometer
May the Force be with you
Force Rotation
in g-force in degrees
Accelerometer Demo
-1.0
0.0
0.0 -0.5
0.0
0.5

46. Accelerometer: May the Force be with you 44
Accelerometer
May the Force be with you

47. Accelerometer: May the Force be with you 44
Accelerometer
May the Force be with you
// enable accelerometer
[[UIAccelerometer sharedAccelerometer] setDelegate:self];
// receive the acceleration values
- (void) accelerometer:(UIAccelerometer *)accelerometer
didAccelerate:(UIAcceleration *)acceleration {
// move ball
ball.x += acceleration.x * kBallSpeed;
ball.y += acceleration.y * kBallSpeed;
// rotate air level
level.rotation = acceleration.y * 90;
}

48. Gyroscope: I’m spinnin’ around 40
Gyroscope
I’m spinnin’ around

49. Gyroscope: I’m spinnin’ around 40
Gyroscope
I’m spinnin’ around
Rotation Rate
in radians per second
0.0
0.0
0.0

50. Gyroscope: I’m spinnin’ around 40
Gyroscope
I’m spinnin’ around
Rotation Rate Absolute Rotation
in radians per second in radians
by adding all rates to reference frame
0.0
0.78
0.0 0.0
0.0
0.0

51. Gyroscope: I’m spinnin’ around 40
Gyroscope
I’m spinnin’ around
Rotation Rate Absolute Rotation
in radians per second in radians
by adding all rates to reference frame
Gyroscope Demo
0.0
0.78
0.0 0.0
0.0
0.0

52. Gyroscope: I’m spinnin’ around 36
Gyroscope
I’m spinnin’ around

53. Gyroscope: I’m spinnin’ around 36
Gyroscope
I’m spinnin’ around
// create core motion manager
motionManager = [[CMMotionManager alloc] init];
motionManager.gyroUpdateInterval = 1.0/60.0;
[motionManager startGyroUpdates];
// frequently call the update method
[self schedule:@selector(update:)];
// frequently read the gyro data
-(void)update:(ccTime)dt {
// absolute rotation
rotationX += motionManager.gyroData.rotationRate.x;
rotationY += motionManager.gyroData.rotationRate.y;
// move ball
ball.x += rotationX + kBallSpeed;
ball.y += rotationY + kBallSpeed;
// rotate air level
level.rotation = rotationY * 180/PI;
}

54. CoreMotion: Use this! 32
CoreMotion
Use this!

55. CoreMotion: Use this! 32
CoreMotion
Use this!
+
Raw data
Accelerometer + Gyroscope

56. CoreMotion: Use this! 32
CoreMotion
Use this!
+
Raw data
Accelerometer + Gyroscope
CoreMotion Framework
6 Degrees of Freedom Inertial System
Dead Reckoning

57. CoreMotion: Use this! 28
CoreMotion
Use this!
+

58. CoreMotion: Use this! 28
CoreMotion
Use this!
+
// create core motion manager
motionManager = [[CMMotionManager alloc] init];
motionManager.motionUpdateInterval = 1.0/60.0;
[motionManager startMotionUpdates];
// frequently call the update method
[self schedule:@selector(update:)];

59. CoreMotion: Use this! 20
CoreMotion
Use this!
+

60. CoreMotion: Use this! 20
CoreMotion
Use this!
+
// frequently read the gyro data
-(void)update:(ccTime)dt {
// absolute rotation
rotationX = motionManager.deviceMotion.attitude.pitch;
rotationY = motionManager.deviceMotion.attitude.yaw;
rotationZ = motionManager.deviceMotion.attitude.roll;
// absolute gravity
gravityX = motionManager.deviceMotion.gravity.x;
gravityY = motionManager.deviceMotion.gravity.y;
gravityZ = motionManager.deviceMotion.gravity.z;
// user acceleration
accelerationX = motionManager.deviceMotion.userAcceleration.x;
accelerationY = motionManager.deviceMotion.userAcceleration.y;
accelerationZ = motionManager.deviceMotion.userAcceleration.z;
}

61. CoreMotion: Use this! 20
CoreMotion
Use this!
+
// frequently read the gyro data
-(void)update:(ccTime)dt {
// absolute rotation
rotationX = motionManager.deviceMotion.attitude.pitch;
rotationY =
rotationZ = CoreMotion Demo
motionManager.deviceMotion.attitude.yaw;
motionManager.deviceMotion.attitude.roll;
// absolute gravity
gravityX = motionManager.deviceMotion.gravity.x;
gravityY = motionManager.deviceMotion.gravity.y;
gravityZ = motionManager.deviceMotion.gravity.z;
// user acceleration
accelerationX = motionManager.deviceMotion.userAcceleration.x;
accelerationY = motionManager.deviceMotion.userAcceleration.y;
accelerationZ = motionManager.deviceMotion.userAcceleration.z;
}

62. Roadmap 16
Roadmap
Where We’re Going

63. Summary: What we did not cover 10
Summary
What we did not cover

64. Summary: What we did not cover 10
Summary
What we did not cover
GPS Accuracy

65. Summary: What we did not cover 10
Summary
What we did not cover
Shaking-Motion Events
GPS Accuracy

66. Summary: What we did not cover 10
Summary
What we did not cover
Recording Movies
Shaking-Motion Events
GPS Accuracy

67. Summary: What we did not cover 10
Summary
What we did not cover
Sensor Availability
Recording Movies
Shaking-Motion Events
GPS Accuracy

68. Summary: What we did not cover 10
Summary
What we did not cover
Sensor Availability
Recording Movies
Shaking-Motion Events
GPS Accuracy
http://developer.apple.com/library/ios

69. Summary: What we learned! 5
Summary
What we learned!

70. Summary: What we learned! 5
Summary
What we learned!
Capturing Images

71. Summary: What we learned! 5
Summary
What we learned!
Recording & Playing Sound
Capturing Images

72. Summary: What we learned! 5
Summary
What we learned!
Geolocating Device
Recording & Playing Sound
Capturing Images

73. Summary: What we learned! 5
Summary
What we learned!
Reading Device Position + 6 Degrees of Freedom
Geolocating Device
Recording & Playing Sound
Capturing Images

74. Summary: What we learned! 5
Summary
What we learned!
Finding Magnetic North
Reading Device Position + 6 Degrees of Freedom
Geolocating Device
Recording & Playing Sound
Capturing Images

75. Thank you: You learned a lot! 0
Thank you
You learned a lot!

76. Thank you: You learned a lot! 0
Download!
https://github.com/southdesign/SuperBall
Me!
Read! Thomas Fankhauser
tommylefunk@googlemail.com
Thank you Hire!
You learned a lot! southdesign.de
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