[BoxCocoaSDK sharedSDK].OAuth2Session.clientID = @"YOUR_CLIENT_ID";
[BoxCocoaSDK sharedSDK].OAuth2Session.clientSecret = @"YOUR_CLIENT_SECRET";

NSURL *authURL = [[BoxCocoaSDK sharedSDK].OAuth2Session authorizeURL];
NSArray *urls = [NSArray arrayWithObject:authURL];
[[NSWorkspace sharedWorkspace] openURLs:urls
				withAppBundleIdentifier:nil //@"com.apple.Safari" if you want to specify Safari rather than the user's default browser
								options:NSWorkspaceLaunchWithoutAddingToRecents
		 additionalEventParamDescriptor:nil
					  launchIdentifiers:NULL];

- (void)handleURLEvent:(NSAppleEventDescriptor *)event withReplyEvent:(NSAppleEventDescriptor *)replyEvent
{
    NSString *receivedUrlString = [[event paramDescriptorForKeyword:keyDirectObject] stringValue];
    [[BoxCocoaSDK sharedSDK].OAuth2Session performAuthorizationCodeGrantWithReceivedURL:[NSURL URLWithString:receivedUrlString]];
}

BoxCollectionBlock success = ^(BoxCollection *collection)
{
  // grab items from the collection, use the collection as a data source
  // for a table view, etc.
};

BoxAPIJSONFailureBlock failure = ^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSDictionary *JSONDictionary)
{
  // handle errors
};

[[BoxCocoaSDK sharedSDK].foldersManager folderItemsWithID:folderID requestBuilder:nil success:success failure:failure];

BoxFileBlock success = ^(BoxFile *file)
{
  // manipulate the BoxFile.
};

BoxAPIJSONFailureBlock failure = ^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSDictionary *JSONDictionary)
{
  // handle errors
};

[[BoxCocoaSDK sharedSDK].filesManager fileInfoWithID:folderID requestBuilder:nil success:success failure:failure];

BoxFileBlock success = ^(BoxFile *file)
{
  // manipulate the BoxFile.
};

BoxAPIJSONFailureBlock failure = ^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSDictionary *JSONDictionary)
{
  // handle errors
};

BoxFilesRequestBuilder *builder = [BoxFilesRequestBuilder alloc] init];
builder.name = @"My awesome file.txt"
builder.parentID = BoxAPIFolderIDRoot;

[[BoxCocoaSDK sharedSDK].filesManager editFileWithID:folderID requestBuilder:builder success:success failure:failure];

BoxFileBlock fileBlock = ^(BoxFile *file)
{
  // manipulate resulting BoxFile
};

BoxAPIJSONFailureBlock failureBlock = ^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, NSDictionary *JSONDictionary)
{
  // handle failed upload
};

BoxAPIMultipartProgressBlock progressBlock = ^(unsigned long long totalBytes, unsigned long long bytesSent)
{
  // indicate progress of upload
};

BoxFilesRequestBuilder *builder = [[BoxFilesRequestBuilder alloc] init];
builder.name = @"Logo_Box_Blue_Whitebg_480x480.jpg";
builder.parentID = folderID;

NSString *path = [[NSBundle mainBundle] pathForResource:@"Logo_Box_Blue_Whitebg_480x480.jpg" ofType:nil];
NSInputStream *inputStream = [NSInputStream inputStreamWithFileAtPath:path];
NSDictionary *fileAttributes = [[NSFileManager defaultManager] attributesOfItemAtPath:path error:nil];
long long contentLength = [[fileAttributes objectForKey:NSFileSize] longLongValue];

[[BoxCocoaSDK sharedSDK].filesManager uploadFileWithInputStream:inputStream contentLength:contentLength MIMEType:nil requestBuilder:builder success:fileBlock failure:failureBlock progress:progressBlock];

NSOutputStream *outputStream = [NSOutputStream outputStreamToFileAtPath:path append:NO];

BoxDownloadSuccessBlock successBlock = ^(NSString *downloadedFileID, long long expectedContentLength)
{
  // handle download, preview download, etc.
};

BoxDownloadFailureBlock failureBlock = ^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error)
{
  // handle download failure
};

BoxAPIDataProgressBlock progressBlock = ^(long long expectedTotalBytes, unsigned long long bytesReceived)
{
  // display progress
};

[[BoxCocoaSDK sharedSDK].filesManager downloadFileWithID:fileID outputStream:outputStream requestBuilder:nil success:successBlock failure:failureBlock progress:progressBlock];