---
title: ALAssetsLibraryWriteImageCompletionBlock
framework: assetslibrary
role: symbol
role_heading: Type Alias
path: assetslibrary/alassetslibrarywriteimagecompletionblock
---

# ALAssetsLibraryWriteImageCompletionBlock

Signature for the block executed when ALAssetsLibrary/writeImage(toSavedPhotosAlbum:orientation:completionBlock:) completes.

## Declaration

```occ
typedef void (^)(NSURL *, NSError *) ALAssetsLibraryWriteImageCompletionBlock;
```

## Discussion

Discussion The block parameters are defined as follows: If the image is not saved, assetURL is nil.

## See Also

### Constants

- [ALAssetsGroupType](assetslibrary/alassetsgrouptype.md)
- [Types of Asset](assetslibrary/types-of-asset.md)
- [ALAssetOrientation](assetslibrary/alassetorientation.md)
- [ALAssetsLibraryGroupsEnumerationResultsBlock](assetslibrary/alassetslibrarygroupsenumerationresultsblock.md)
- [ALAssetsLibraryAssetForURLResultBlock](assetslibrary/alassetslibraryassetforurlresultblock.md)
- [ALAssetsLibraryWriteVideoCompletionBlock](assetslibrary/alassetslibrarywritevideocompletionblock.md)
- [ALAssetsLibraryAccessFailureBlock](assetslibrary/alassetslibraryaccessfailureblock.md)
- [ALAssetsLibraryGroupResultBlock](assetslibrary/alassetslibrarygroupresultblock.md)
- [ALAuthorizationStatus](assetslibrary/alauthorizationstatus.md)
- [Notification Keys](assetslibrary/notification-keys.md)
- [Error Domain](assetslibrary/error-domain.md)
- [Error Codes](assetslibrary/error-codes.md)