Example BS objc.m

// self.service = [[CRMicrosoftAzure alloc] initWithAccountName:@"[account_name]" accessKey:@"[access_key]"];
// self.service = [[CRAmazonS3 alloc] initWithAccessKeyId:@"[clientID]" secretAccessKey:@"[client_Secret]" region:@"[region]"];
// self.service = [[CRRackspace alloc] initWithUsername:@"[username]" apiKey:@"[api_key]" region:@"[region]"];
self.service = [[CRBackblaze alloc] initWithAccountID:@"[account_init]" appKey:@"[app_key]"];

CRBucket * bucket = [[CRBucket alloc] init];
bucket.name = @"[bucket_name]";
bucket.identifier = @"[bucket_id]";

NSData * data = //data source;
NSInputStream * inputStream = [NSInputStream inputStreamWithData:data];
@try {
  [self.currentService uploadFileToBucket:bucket name:@"[file_name]" withStream:inputStream size:data.length];
} @catch (NSException *exception) {
  //handle exception
}