AFNetworking-RACExtensions example

API.m

- (RACSignal *)fetchSomething {
  NSString *path = @"path/to/endpoint";

  @weakify(self);
  RACSignal *signal = [RACSignal createSignal:^RACDisposable *(id < RACSubscriber > subscriber) {
    @strongify(self);
    [[self rac_GET:path parameters:nil] subscribeNext:^(id responseObject) {
      NSError *error = nil;
      NSArray *results = [MTLJSONAdapter modelsOfClass:[XXXModel class] fromJSONArray:responseObject error:&error];
      if (error) {
        [subscriber sendError:error];
      } else {
        [subscriber sendNext:results];
        [subscriber sendCompleted];
      }
    } error:^(NSError *error) {
      [subscriber sendError:error];
    }];
    return nil;
  }];

  return signal;
}