---
title: ALAssetPropertyAssetURL
framework: assetslibrary
role: symbol
role_heading: Global Variable
path: assetslibrary/alassetpropertyasseturl
---

# ALAssetPropertyAssetURL

The key to retrieve a URL identifier for the asset.

## Declaration

```occ
extern NSString * const ALAssetPropertyAssetURL;
```

## Discussion

Discussion The corresponding value is an NSURL object. This URL is used by the library-change notifications to identify assets and asset groups. Only the ALAssetRepresentation and ALAssetsGroup classes support this property.

## See Also

### Constants

- [ALAssetLibraryDeletedAssetGroupsKey](assetslibrary/alassetlibrarydeletedassetgroupskey.md)
- [ALAssetLibraryInsertedAssetGroupsKey](assetslibrary/alassetlibraryinsertedassetgroupskey.md)
- [ALAssetLibraryUpdatedAssetGroupsKey](assetslibrary/alassetlibraryupdatedassetgroupskey.md)
- [ALAssetLibraryUpdatedAssetsKey](assetslibrary/alassetlibraryupdatedassetskey.md)
- [ALAssetPropertyDate](assetslibrary/alassetpropertydate.md)
- [ALAssetPropertyDuration](assetslibrary/alassetpropertyduration.md)
- [ALAssetPropertyLocation](assetslibrary/alassetpropertylocation.md)
- [ALAssetPropertyOrientation](assetslibrary/alassetpropertyorientation.md)
- [ALAssetPropertyRepresentations](assetslibrary/alassetpropertyrepresentations.md)
- [ALAssetPropertyType](assetslibrary/alassetpropertytype.md)
- [ALAssetPropertyURLs](assetslibrary/alassetpropertyurls.md)
- [ALAssetTypePhoto](assetslibrary/alassettypephoto.md)
- [ALAssetTypeUnknown](assetslibrary/alassettypeunknown.md)
- [ALAssetTypeVideo](assetslibrary/alassettypevideo.md)
- [ALAssetsGroupPropertyName](assetslibrary/alassetsgrouppropertyname.md)