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POHandling the Async event in CLGeocoder (iOS5)
 

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    <p>I am trying to reverse geocode a location, I have managed todo this but I have hit a slight snag which is preventing me from completing it. I think I know WHAT it's doing and WHY, but I am not able to figure out a way to get around it yet. (I am using ARC and iOS5)</p> <p>The problem occurs when I execute the following code in my init method ...</p> <pre><code>[self setSubtitle: [dateString stringByAppendingString: self.city ] ]; </code></pre> <p>self.city is returning back a null value, I am pretty sure this is because the init method completes WAY before the geocoder can go and do it's thing.</p> <p>So my question is, how can I handle this situation? I assume sitting and waiting for the geocoder to complete its work and freezing the app until such time isn't the way to go?</p> <pre><code>#import "MapPoint.h" @implementation MapPoint @synthesize coordinate, title, dateAdded, subtitle, city; -(id)initWithCoordinates:(CLLocationCoordinate2D)c title:(NSString *)t { self = [super init]; if (self) { coordinate = c; [self setTitle: t]; [self setCurrentCity: [[CLLocation alloc] initWithLatitude:c.latitude longitude:c.longitude]]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setTimeStyle:NSDateFormatterNoStyle]; [formatter setDateStyle:NSDateFormatterLongStyle]; [self setDateAdded: [[NSDate alloc] init]]; NSString *dateString = [formatter stringFromDate: [self dateAdded]]; [self setSubtitle: [dateString stringByAppendingString: self.city ] ]; } return self; } -(void)setCurrentCity: (CLLocation *)loc { CLGeocoder *reverseGeo; if (!reverseGeo) { reverseGeo = [[CLGeocoder alloc] init]; } [reverseGeo reverseGeocodeLocation: loc completionHandler: ^(NSArray *placemarks, NSError *error) { if ([placemarks count] &gt; 0) { CLPlacemark *topResult = [placemarks objectAtIndex:0]; self.city = [NSString stringWithFormat:@"%@", [topResult locality]]; } }]; } @end </code></pre>
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