iOS Is there anything wrong with this?

[arnieterm]

Inside the app delegate of an iphone application, I have declared a protocol as given below:

@protocol UILocationDelegate <NSObject>
@required
-(void) locationChanged:(float)newlatitude:(float)newlongitude;
@end

There is an instance of CLLocationManager inside the app delegate with property as given below:

CLLocationManager* locationManager;
id	delegate;

@property(nonatomic,retain)CLLocationManager* locationManager;
@property (nonatomic,assign) id <UILocationDelegate> delegate;

After synthesizing all the required fields, I have used the below given code:

- (void)locationManager:(CLLocationManager *)manager
	didUpdateToLocation:(CLLocation *)newLocation
		   fromLocation:(CLLocation *)oldLocation
{
	
	[self.delegate locationChanged:newLocation.coordinate.latitude:newLocation.coordinate.longitude];
}

In another view controller, I hae implemented the UILocationDelegate as given below:

@interface UIMyController : UIViewController <UIAlertViewDelegate,UILocationDelegate,UIScrollViewDelegate>

In the .m file of this viewcontroller, I have written:

-(void) locationChanged:(float)newlatitude:(float)newlongitude
{
	
	
	
}

Is there anything wrong with the above given logic as I want to handle the callbacks from the CLLocationManager but the event in the above viewcontroller is not getting raised.

Thanks
Arnieterm

 

[caveman_uk]

You don't declare method names like this

-(void) locationChanged:(float)newlatitude:(float)newlongitude

You need to split the parameters up like this

-(void) locationChangedToLatitude:(float)newlatitude longitude:(float)newlongitude

 

[jnic]

You don't declare method names like this

-(void) locationChanged:(float)newlatitude:(float)newlongitude

You need to split the parameters up like this

-(void) locationChangedToLatitude:(float)newlatitude longitude:(float)newlongitude

The former is still a valid method signature. Have you confirmed that the locationManager:didUpdateToLocation:fromLocation: method is being called?

 

[arnieterm]

The former is still a valid method signature. Have you confirmed that the locationManager:didUpdateToLocation:fromLocation: method is being called?

Yes I have confirmed, it is not being called and also the LocationServices is enabled [turned on] in Settings. Instead I am getting the event "didFailWithError" with strError=@"Unknown location error". My iphone do not have any SIM and I am in India

-(void)locationManager:(CLLocationManager *)manager
	   didFailWithError:(NSError *)error
{
	NSString* strError;
	if([error domain]==kCLErrorDomain)
	{
		switch([error code])
		{
			case kCLErrorDenied:
				strError=@"Location denied error";
				break;
			case kCLErrorLocationUnknown:
				strError=@"Unknown location error";
				break;
			default:
				strError=@"Generic Location Error";
				break;
		}
	}
	else
	{
		strError=[@"Error doamin: " stringByAppendingString: error.domain];
		strError=[ [ strError stringByAppendingString:@" Error Code: "]stringByAppendingString: [ [NSNumber numberWithInteger:error.code] stringValue ]];
	}
	//NSString* strError=[@"Error doamin: " stringByAppendingString: error.domain];
	//strError=[ [ strError stringByAppendingString:@" Error Code: "]stringByAppendingString: [ [NSNumber numberWithInteger:error.code] stringValue ]];
	UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error:Location Services" message:strError delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
	//UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error:Location Services" message:@"There is an error in getting the location details" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
	[alert show];
	[alert release];
	
}

 

[jnic]

So the problem isn't with your delegate but with Core Location. Are other apps that rely on CL (e.g. Google Maps) working correctly for you?