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Updating, Managing, and Displaying User Locations

/ Published in: Objective C
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How to manage and update user locations using the onUnityLocations delegate.

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  1. - (void) onUnityLocations:(NSDictionary *)locations
  2. {
  3.  
  4.     for(NSNumber *key in [locations allKeys])
  5.     {
  6.         ProfileLocation *affiliateLocation = [locations objectForKey:key];
  7.  
  8.         if(![self.unityAffiliateMarkers objectForKey:key]) // the users profile and location has not been cached yet
  9.         {
  10.             Profile *affiliateProfile = [[Profile alloc]init];
  11.             affiliateProfile.entityId = affiliateLocation.profileId;
  12.             if(!affiliateProfile.entityId==0)
  13.             {
  14.                 [self readUnityObject:affiliateProfile withCompletionBlock:^(id object, bool success, NSString * errorMessage)
  15.                  {
  16.                      if(success) // generate a GMSMarker containing the profile object
  17.                      {
  18.                          GMSMarker *affiliateLocationMarker = [GMSMarker markerWithPosition:CLLocationCoordinate2DMake(affiliateLocation.latitude, affiliateLocation.longitude)];
  19.                          affiliateLocationMarker.flat = YES;
  20.                          affiliateLocationMarker.zIndex = -1;
  21.                          affiliateLocationMarker.appearAnimation=kGMSMarkerAnimationPop;
  22.                          affiliateLocationMarker.groundAnchor = CGPointMake(0.5, 0.5);
  23.                          [affiliateLocationMarker setUserData:((Profile *)object)]; // this sets the profile to the marker
  24.                          affiliateLocationMarker.icon= [TenDegreesHelpers roundImageCorners:[self applyAlpha:1 toImage:[self image:[TenDegreesHelpers stringToUIImage:((Profile *)object).icon] scaledToSize:CGSizeMake(30.0f, 30.0f)]]];
  25.  
  26.                          if(![self.unityAffiliateMarkers objectForKey:key]) // check again to prevent duplicate locations
  27.                          {
  28.                          	affiliateLocationMarker.map=self.googleMap;
  29.                          	[self.unityAffiliateMarkers setObject:affiliateLocationMarker forKey:key];
  30.                          }
  31.                      }
  32.                      else
  33.                      {
  34.                          NSLog(@"%@",errorMessage);
  35.                      }
  36.                  }];
  37.             }
  38.  
  39.         }
  40.         else // users location and profile are already cached - just update their location on the map
  41.         {
  42.             GMSMarker *affiliateLocationMarker = [self.unityAffiliateMarkers objectForKey:key];
  43.             [affiliateLocationMarker setPosition:CLLocationCoordinate2DMake(affiliateLocation.latitude, affiliateLocation.longitude)];
  44.  
  45.         }
  46.  
  47.     }
  48.     for(NSNumber *key in [self.unityAffiliateMarkers allKeys])
  49.     {
  50.         if(![locations objectForKey:key]) // remove any markers of users who have logged out or timed out
  51.         {
  52.             GMSMarker *affiliateLocationMarker = [self.unityAffiliateMarkers objectForKey:key];
  53.             affiliateLocationMarker.map=nil;
  54.             [self.unityAffiliateMarkers removeObjectForKey:key];
  55.         }
  56.     }
  57.     [_extendUpdateDelegate onLocations:locations];
  58. }

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