Help with getting location information

[elias130]

Ok so i am just starting out on writing code and i am having problems due to my lack of programming knowledge. I have gotten this code from the book,"Beginning iphone Development" so this code is not my work but Dave Mark, and Jeff LaMarche work.

my question is now that i have gotten the location data i want to create a method which can access the method which contains locationManager.

-(void)locationManager:(CLLocationManager *)manager 
didUpdateToLocation:(CLLocation *)newLocation 
fromLocation:(CLLocation *)oldLocation{

	if(startingPoint == nil)
		self.startingPoint = newLocation;
	
	
	NSString *latString = [[NSString alloc] initWithFormat:@"%g°", newLocation.coordinate.latitude];
	latLabel.text = latString;
	[latString release];
	
	NSString *lonString = [[NSString alloc] initWithFormat:@"%g°", newLocation.coordinate.longitude];
	lonLabel.text = lonString;
	[lonString release];
	
	NSString *horizontalAccuracyString = [[NSString alloc] initWithFormat:@"%gm", newLocation.horizontalAccuracy];
	horizontalAccuracyLabel.text = horizontalAccuracyString;
	[horizontalAccuracyString release];
	
	NSString *altitudeString = [[NSString alloc] initWithFormat:@"%gm", newLocation.altitude];
	altitudeLabel.text = altitudeString;
	[altitudeString release];
	
	NSString *verticalAccuracyString = [[NSString alloc] initWithFormat:@"%gm", newLocation.verticalAccuracy];
	verticalAccuracyLabel.text = verticalAccuracyString;
	[verticalAccuracyString release];
	
	CLLocationDistance distance = [newLocation getDistanceFrom:startingPoint];
	NSString *distanceString = [[NSString alloc] initWithFormat:@"%gm", distance];
	distanceTraveledLabel.text = distanceString;
	[distanceString release];
}

for example my new method wants to get the current altitude then wait 10 seconds and get the altitude again, with this data i would then take the change in altitude/time(10 secs) to get how many m/s i am moving up.


//sudo code

-(IBAction)getSpeed{
getAltitude;
wait 10 seconds;
getAltitudeDelayed;

AltitudeDelayed-Altitude = changeInAltitude;
chageInAltitdue/10 = rateOfChange;

label.text = rateOfChange; 
}

any help would be awesome!!

[Chobie]

You need to understand how core location services work.

The method locationManager:didUpdateToLocation:fromLocation: is a delegate method and will be called everytime the location manager gets the latest location information.

Within the CLLocation objects you can get a whole load of information, altitude included but this requires GPS so you should configure the CLLocationManager accordingly.