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# continueActivity(_:)

Continues to perform the task for a user activity object using a different block.

```
func continueActivity(_ block: () -> Void)
```

## Parameters

`block`

The block to be invoked.

## Discussion

When AppKit calls [`performActivity(withSynchronousWaiting:using:)`](/documentation/AppKit/NSDocument/performActivity(withSynchronousWaiting:using:)) recursively, it may execute this method with the specified block to avoid a deadlock.

If a block that was passed to [`performActivity(withSynchronousWaiting:using:)`](/documentation/AppKit/NSDocument/performActivity(withSynchronousWaiting:using:)) is being invoked, this method invokes the passed-in block, having recorded state that makes inner invocations of [`performActivity(withSynchronousWaiting:using:)`](/documentation/AppKit/NSDocument/performActivity(withSynchronousWaiting:using:)) not wait. If this method is invoked outside of an invocation of a block passed to [`performActivity(withSynchronousWaiting:using:)`](/documentation/AppKit/NSDocument/performActivity(withSynchronousWaiting:using:)), this method simply invokes the passed-in block.

This method is useful when code executed in a block passed to [`performActivity(withSynchronousWaiting:using:)`](/documentation/AppKit/NSDocument/performActivity(withSynchronousWaiting:using:)) may also invoke that method. For example, [`save(withDelegate:didSave:contextInfo:)`](/documentation/AppKit/NSDocument/save(withDelegate:didSave:contextInfo:)), which uses [`performActivity(withSynchronousWaiting:using:)`](/documentation/AppKit/NSDocument/performActivity(withSynchronousWaiting:using:)), uses this around its invocation of [`runModalSavePanel(for:delegate:didSave:contextInfo:)`](/documentation/AppKit/NSDocument/runModalSavePanel(for:delegate:didSave:contextInfo:)) or [`save(to:ofType:for:delegate:didSave:contextInfo:)`](/documentation/AppKit/NSDocument/save(to:ofType:for:delegate:didSave:contextInfo:)) because both of those methods also use [`performActivity(withSynchronousWaiting:using:)`](/documentation/AppKit/NSDocument/performActivity(withSynchronousWaiting:using:)). Without the use of this method the inner invocation of [`performActivity(withSynchronousWaiting:using:)`](/documentation/AppKit/NSDocument/performActivity(withSynchronousWaiting:using:)) would wait forever.

---

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