[VCR start];
 
NSString *path = @"http://example.com/example";
NSURL *url = [NSURL URLWithString:path];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

// use either NSURLSession or NSURLConnection
NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request];
[task resume];
 
// NSURLSession makes a real network request and VCRURLConnection
// will record the request/response pair.

// once async request is complete or application is ready to exit:
[VCR save:@"/path/to/cassette.json"]; // copy the output file into your project

NSURL *cassetteURL = [NSURL fileURLWithPath:@"/path/to/cassette.json"];
[VCR loadCassetteWithContentsOfURL:cassetteURL];
[VCR start];

// request an HTTP interaction that was recorded to cassette.json
NSString *path = @"http://example.com/example";
NSURL *url = [NSURL URLWithString:path];
NSURLRequest *request = [NSURLRequest requestWithURL:url];

// use either NSURLSession or NSURLConnection
NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request];
[task resume];
 
// The cassette has a recording for this request, so no network request
// is made. Instead NSURLConnectionDelegate methods are called with the
// previously recorded response.