Multiple sensors in iOS

Question

I have two different POC, one for the accelerometer and one for GPS. However, I am not comprehending the architecture to put marry both of the applications. I need to initialize both the accel and GPS when the application loads. I have the main view tied to the accel, but also need to the the location of the device.

My current architecture is Projects in workspace

Main App
Utility App
Services App
Domain App

The main app ViewController inherits

: UIViewController

That all wires up correctly the the accel works as expected.

In the Utility CoreLocationUtility class, I have it inheriting the CLLocationManagerDelegate.

The question is, how do I register a delegate from the same view that is of type AccelDelegate?

score 0 · Accepted Answer · answered Dec 01 '12 at 19:05

If you want to make your ViewController act as delegate for both accelerometer and GPS, state in its header file that it obeys both delegate protocols:

@interface ViewController : UIViewController <CLLocationManagerDelegate, UIAccelerometerDelegate> {
    CLLocationManager *myLocationManager; // an instance variable
}
 // ... your definitions
@end

then somewhere in your ViewController

[UIAccelerometer sharedAccelerometer].delegate = self;
myLocationManager = [[CLLocationManager alloc] init];
myLocationManager.delegate = self;

then somewhere else in your ViewController, put the delegate methods for both protocols

- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
    // ... your code
}

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
   // ... your code

}

and that should work, although there may be typos, I have not compiled this. Plus, in my experience, location manager code tends to get quite big. You may be much better off putting it in a class of its own, to be instantiated by the ViewController.

Can anyone explain why the only method in the UIAccelerometerDelegate protocol is deprecated?

The protocol is dperectaed because you shoul duse CoreMotion instead: see http://stackoverflow.com/questions/6742531/why-is-accelerometerdidaccelerate-deprecated-in-ios5 — AlexWien, Dec 01 '12 at 19:18
Thanks! I've never used the accelerometer, I will file that away for later. — emrys57, Dec 01 '12 at 22:13

Multiple sensors in iOS

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