How can the accelerometer be used in a controller with a seperate view?

Question

I am trying to get the accelerometer to detect shakes in a separate view and the accelerometer method does not get called?

When I place code to set the accelerometer attributes in the controllers viewDidLoad method and add the ......didAccelerate:(UIAcceleration *) acceleration in the implementation file for the controller shakes are detected.

I'm a novice to iphone development and think that perhaps the code:

accelerometer.delegate = self;

should point to the view? Rather than self?

Any help would be really appreciated. I'm really not sure how to solve this?

Answer 1

There often seems to be a cognitive disconnect between an API reference and actually using the API in actual code with Cocoa/Objective-C by beginners.

This sample code shows how a view controller can access the accelerometer in an iPhone OS app.

iPhone Dev Site link

Hint: did you set an update interval?

Answer 2

If your accelerometer callback method is not being called there's a good chance your application delegate (or other custom class) is not supporting the UIAccelerometerDelegate class. Some very loose pseudocode on making that delcaration in your application delegate...

@interface MyApplicationDelegate: UIApplicationDelegate<UIAccelerometerDelegate>
{
   .. class definition stuff ..
}

See the Apple documentation here...

http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/AdvancedFeatures/AdvancedFeatures.html

And review the Accessing Accelerometer Events section