RAC_warpping_AFNetworking

RAC_warpping_AFNetworking.m

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // When view disappeared cancel the request
    RACSignal *willDisappear = [self rac_signalForSelector:@selector(viewWillDisappear:)];
    
    // load data
    @weakify(self)
    [[[[self loadDataSignal]
      takeUntil:willDisappear]
       deliverOnMainThread]
     subscribeNext:^(NSDictionary *responseObject) {
         @strongify(self);
         // Do something
     } error:^(NSError *error) {
         DDLogDebug(@"An error occurred: %@", error);
     }];
}

- (RACSignal *)loadDataSignal {
    @weakify(self)
    return [RACSignal createSignal:^RACDisposable *(id<RACSubscriber> subscriber) {
        @strongify(self)
        AFHTTPRequestOperation *operation = [self.requestManager
                                             POST:@"an_url"
                                             parameters:@{@"parameter" : @"parameter"}
                                             success:^(AFHTTPRequestOperation * _Nonnull operation, id  _Nonnull responseObject) {
                                                 [subscriber sendNext:responseObject];
                                                 [subscriber sendCompleted];
                                             }
                                             failure:^(AFHTTPRequestOperation * _Nonnull operation, NSError * _Nonnull error) {
                                                 [subscriber sendError:error];
                                             }];
        return [RACDisposable disposableWithBlock:^{
            [operation cancel];
        }];
    }];
}