// add or update a record

SGStoredRecord *record = [SGStoredRecord recordWithID:@"recordID"
                                                point:[SGPoint pointWithLat:37.772445 lon:-122.405913]
                                                layer:@"com.simplegeo.example"];

[record setCreated:date]; // optional
[record setProperties:propertiesDictionary]; // optional

[client addOrUpdateRecord:record
                 callback:[SGCallback callbackWithSuccessBlock:
                           ^(id response) {
                               // addition/update confirmed
                           } failureBlock^(NSError *error) {
                               // addition/update failed
                           }]];