#import <AZSClient/AZSClient.h>

-(void)createAndDeleteBlob
{
    // Create a semaphore to prevent the method from exiting before all of the async operations finish.
    // In most real applications, you wouldn't do this, it makes this whole series of operations synchronous.
    dispatch_semaphore_t semaphore = dispatch_semaphore_create(0);
    
    // Create a storage account object from a connection string.
    AZSCloudStorageAccount *account = [AZSCloudStorageAccount accountFromConnectionString:@"myConnectionString"];
    
    // Create a blob service client object.
    AZSCloudBlobClient *blobClient = [account getBlobClient];
    
    // Create a local container object with a unique name.
    NSString *containerName = [[NSString stringWithFormat:@"sampleioscontainer%@",[[[NSUUID UUID] UUIDString] stringByReplacingOccurrencesOfString:@"-" withString:@""]] lowercaseString];
    AZSCloudBlobContainer *blobContainer = [blobClient containerReferenceFromName:containerName];
    
    // Create the container on the service and check to see if there was an error.
    [blobContainer createContainerWithCompletionHandler:^(NSError* error){
        if (error != nil){
            NSLog(@"Error in creating container.");
        }
        
        // Create a local blob object
        AZSCloudBlockBlob *blockBlob = [blobContainer blockBlobReferenceFromName:@"blockBlob"];
        
        // Get some sample text for the blob
        NSString *blobText = @"Sample blob text";
        
        // Upload the text to the blob.
        [blockBlob uploadFromText:blobText completionHandler:^(NSError *error) {
            if (error != nil){
                NSLog(@"Error in uploading blob.");
            }
            
            // Download the blob's contents to a new text string.
            [blockBlob downloadToTextWithCompletionHandler:^(NSError *error, NSString *resultText) {
                if (error != nil){
                    NSLog(@"Error in downloading blob.");
                }
                
                // Validate that the uploaded/downloaded string is correct.
                if (![blobText isEqualToString:resultText])
                {
                    NSLog(@"Error - the text in the blob does not match.");
                }
                
                // Delete the container from the service.
                [blobContainer deleteContainerWithCompletionHandler:^(NSError* error){
                    if (error != nil){
                        NSLog(@"Error in deleting container.");
                    }
                    
                    dispatch_semaphore_signal(semaphore);
                }];
            }];
        }];
    }];
    
    // Pause the method until the above operations complete.
    dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER);
}