> For the complete documentation index, see [llms.txt](https://docs.sentiance.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sentiance.com/sdk/api-reference/ios/sentasyncinitializationcompletionhandler.md).

# SENTAsyncInitializationCompletionHandler

This closure is used with [initializeAsync(withOptions:launchOptions:completionHandler:)](/sdk/api-reference/ios/sentiance.md#initializeasyncwithoptions-launchoptions-completionhandler).

## SENTAsyncInitializationCompletionHandler API

```swift
typealias SENTAsyncInitializationCompletionHandler = 
    (SENTAsyncInitializationResult?, SENTAsyncInitializationError?) -> Void
```

See [SENTAsyncInitializationResult](/sdk/api-reference/ios/sentasyncinitializationresult.md) and [SENTAsyncInitializationError](/sdk/api-reference/ios/sentasyncinitializationerror.md).