---
title: Using Bookmark Data
framework: professional-video-applications
role: article
path: professional-video-applications/using-bookmark-data
---

# Using Bookmark Data

## Using Bookmark Data

Using Bookmark Data Access file-system resources using the security-scoped bookmark data.

Overview

Follow these steps to use a security-scoped bookmark in a sandboxed application:

1.     Decode the bookmark data. The bookmark data in the bookmark element is Base64-encoded, so decode the bookmark before using it. 2.     Resolve the decoded bookmark data into a security-scoped URL that points to the media asset. 3.     Indicate that you want to use the security-scoped URL to access the file-system resource by calling the `startAccessingSecurityScopedResource` method. 4.     Access the file-system resource using the security-scoped URL in your application. 5.     Release the file-system resource by calling the `stopAccessingSecurityScopedResource` method.

The above steps are outlined in the following code snippet. For more information on the NSURL methods used, see [NSURL](/documentation/Foundation/NSURL) Class Reference.

```swift // Decode the Base64 bookmark data NSData *decodedBookmark =[[NSData alloc] initWithBase64EncodedString: bookmark options:NSDataBase64DecodingIgnoreUnknownCharacters];

// Resolve the decoded bookmark data into a security-scoped URL. NSError *err = nil; NSURL *url =[NSURL URLByResolvingBookmarkData: decodedBookmark options: NSURLBookmarkResolutionWithSecurityScope relativeToURL: sourceURL bookmarkDataIsStale: nil error:&err];

if (url)   {     // Indicate that you want to access the file-system resource.     [url startAccessingSecurityScopedResource];

// Use the resolved security scoped URL.     ...       // Release the file-system resource when you are done.       [url stopAccessingSecurityScopedResource];   }

// Release the decoded bookmark data [decodedBookmark release];

```

> Note >  To use security-scoped bookmarks, your application must have the `com.apple.security.files.bookmarks.document-scope` entitlement set to `true`. For more details on enabling security-scoperd bookmarks,  see Enabling Security-Scoped Bookmark and URL Access.