RACSignalDemoFunction

RACSignalDemoFunction.m

- (RACSignal *)RACSignalDemoFunction {
    return [RACSignal createSignal:^(id<RACSubscriber> subscriber) {
        // your code ...
        BOOL isSuccess = YES;
        NSObject *result = [NSObject new];
        if (isSuccess) {
            [subscriber sendNext:result];
            [subscriber sendCompleted];
            
        } else {
            [subscriber sendError:[NSError new]];
        }
        
        return [RACDisposable disposableWithBlock:^{
            //TODO:
        }];
    }];
}

// example 1
RACSignal *singnal = [self RACSignalDemoFunction];
[singnal subscribeNext:^(id  _Nullable x) {
    //TODO: your code
} error:^(NSError * _Nullable error) {
    //TODO: your code
}];

// example 2
[[self RACSignalDemoFunction] subscribeNext:^(id  _Nullable x) {
    //TODO: next
} error:^(NSError * _Nullable error) {
    //TODO: error
} completed:^{
    //TODO: completed
}];