---
title: "CFWriteStreamScheduleWithRunLoop(_:_:_:)"
framework: corefoundation
role: symbol
role_heading: Function
path: "corefoundation/cfwritestreamschedulewithrunloop(_:_:_:)"
---

# CFWriteStreamScheduleWithRunLoop(_:_:_:)

Schedules a stream into a run loop.

## Declaration

```swift
func CFWriteStreamScheduleWithRunLoop(_ stream: CFWriteStream!, _ runLoop: CFRunLoop!, _ runLoopMode: CFRunLoopMode!)
```

## Parameters

- `stream`: The stream to schedule.
- `runLoop`: The run loop in which to schedule stream.
- `runLoopMode`: The run loop mode of runLoop in which to schedule stream.

## Discussion

Discussion After scheduling stream into a run loop, its client (set with CFWriteStreamSetClient(_:_:_:_:)) is notified when various events happen with the stream, such as when it finishes opening, when it can accept new bytes, and when an error occurs. A stream can be scheduled into multiple run loops and run loop modes. Use CFWriteStreamUnscheduleFromRunLoop(_:_:_:) to later remove stream from the run loop.

## See Also

### Scheduling a Write Stream

- [CFWriteStreamUnscheduleFromRunLoop(_:_:_:)](corefoundation/cfwritestreamunschedulefromrunloop(_:_:_:).md)