title: Using OpenCV FileStorage on iOS
body: <p>I am creating an object classifier using OpenCV and to avoid having to train the classifiers every time the app is launched I would like to somehow store them in a file. The most convenient way available seems to be using <a href="http://opencv.willowgarage.com/documentation/cpp/xml/yaml_persistence.html" rel="noreferrer">OpenCVs FileStorage class</a>.</p>
  
  <p>I gave this a shot but it didn't seem to work. The saved file did not show up anywhere though I did not receive an error. I suppose iOS doesn't just let you save any file. An alternative way would be to retrieve the YAML as a string, convert it to an NSString and save it in a property list, but I am not sure how this can be done or whether it is even possible.</p>
  
  <p>Any help would be greatly appreciated.</p>