Posted By

espinallab on 02/04/10

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Last Edited at 02/04/10 04:51pm

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Get the distance from the user's location to the venue

/ Published in: Objective C

This is the code i wrote for clubplanet to get the distance from the user's location to the venues.

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//Get the distance from the user's location to the venue
		CLLocation *userLoc = [[CLLocation alloc] initWithLatitude:userLocation.latitude longitude:userLocation.longitude];
		
		CLLocationCoordinate2D venueCoord = [self addressLocation:venueAddress];
		CLLocation *venueLoc = [[CLLocation alloc] initWithLatitude:venueCoord.latitude longitude:venueCoord.longitude];
		
		double dist = [userLoc getDistanceFrom:venueLoc] / 1609.344;
		
		//NSLog(@"%.2f miles", dist);
		
		lblapproxdistance.text = [NSString stringWithFormat:@"%.1f miles",dist];

#pragma mark addressLocation

//method to convert address to longitude and latitude
-(CLLocationCoordinate2D) addressLocation:(NSString *)address {
    NSString *urlString = [NSString stringWithFormat:@"http://maps.google.com/maps/geo?q=%@&output=csv&key=ABQIAAAA-d08Ko4-kHQWa1zY6Y4n2BQJqvlAqZSQuvHwEwe-mLrrdxxNhxRp0156iscZ4xaIZTeX_4YwLHlJEA", 
						   [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    NSString *locationString = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString]];
    NSArray *listItems = [locationString componentsSeparatedByString:@","];
	
    double _latitude = 0.0;
    double _longitude = 0.0;
	
    if([listItems count] >= 4 && [[listItems objectAtIndex:0] isEqualToString:@"200"]) {
        _latitude = [[listItems objectAtIndex:2] doubleValue];
        _longitude = [[listItems objectAtIndex:3] doubleValue];
    }
    else {
		//Show error
    }
    CLLocationCoordinate2D _location;
    _location.latitude = _latitude;
    _location.longitude = _longitude;
	
	//NSLog(@"%f - %f", latitude, longitude);
	
    return _location;
}

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