---
title: completionBlock()
framework: quartzcore
role: symbol
role_heading: Type Method
path: quartzcore/catransaction/completionblock()
---

# completionBlock()

Returns the completion block object.

## Declaration

```swift
class func completionBlock() -> (() -> Void)?
```

## Discussion

Discussion See setCompletionBlock(_:) for a description of the role of the completion block object.

## See Also

### Getting and Setting Completion Block Objects

- [setCompletionBlock(_:)](quartzcore/catransaction/setcompletionblock(_:).md)