ReactiveUserLocations.m

// One Off
RACSignal *currentUserLocationSignalX = [self.locationService.locationSignal take:1];

// Refresh User Location on a interval timer
RACSignal *currentUserLocationIntervalSignal = [[[RACSignal
        interval:60
     onScheduler:RACScheduler.scheduler]
        map:^id(id value) {
            strongify(self);
            return [self.locationService.locationSignal take:1];
        }]
        flatten];
  
// Refresh User Location every time the signal is accessed (handy when combining signals)
RACSignal *currentUserLocationSignal = [[RACSignal
        createSignal:^RACDisposable *(id <RACSubscriber> subscriber) {

            strongify(self);
            [subscriber sendNext:[self.locationService.locationSignal take:1]];
            return nil;

        }] flatten];