---
title: Publishers.SubscribeOn
framework: combine
role: symbol
role_heading: Structure
path: combine/publishers/subscribeon
---

# Publishers.SubscribeOn

A publisher that receives elements from an upstream publisher on a specific scheduler.

## Declaration

```swift
struct SubscribeOn<Upstream, Context> where Upstream : Publisher, Context : Scheduler
```

## Topics

### Creating a subscribe-on publisher

- [init(upstream:scheduler:options:)](combine/publishers/subscribeon/init(upstream:scheduler:options:).md)

### Declaring supporting types

- [Publishers.SubscribeOn.Output](combine/publishers/subscribeon/output.md)
- [Publishers.SubscribeOn.Failure](combine/publishers/subscribeon/failure.md)

### Inspecting publisher properties

- [upstream](combine/publishers/subscribeon/upstream.md)
- [scheduler](combine/publishers/subscribeon/scheduler.md)
- [options](combine/publishers/subscribeon/options.md)

## Relationships

### Conforms To

- [Publisher](combine/publisher.md)

## See Also

### Working with subscribers

- [Publishers.ReceiveOn](combine/publishers/receiveon.md)