---
title: activate()
framework: dispatch
role: symbol
role_heading: Instance Method
path: dispatch/dispatchobject/activate()
---

# activate()

Activates the dispatch object.

## Declaration

```swift
func activate()
```

## Discussion

Discussion Once a dispatch object has been activated, it cannot change its target queue.

## See Also

### Activating, Suspending, and Resuming

- [resume()](dispatch/dispatchobject/resume().md)
- [suspend()](dispatch/dispatchobject/suspend().md)