title: How to detect when user has hit "Record" button in UIImagePickerController?
body: <p>I would like to show a countdown when the user hits the record button in the UIImagePicker controller but there is no delegate method telling us when they hit record.  I'm able to set a max duration but I would like to give a 1 minute warning or something to that effect but I'm not sure how to do that</p>
  
  <pre class="lang-m prettyprint-override"><code>videoPickerCtrl = [[UIImagePickerController alloc] init];
  videoPickerCtrl.delegate = self;
  videoPickerCtrl.sourceType =      UIImagePickerControllerSourceTypeCamera;
  videoPickerCtrl.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:videoPickerCtrl.sourceType];   
  videoPickerCtrl.allowsEditing = NO;
  videoPickerCtrl.videoMaximumDuration = 170;
  videoPickerCtrl.mediaTypes = [NSArray arrayWithObject:(NSString *)kUTTypeMovie];
  </code></pre>
  
  <p>EDIT:</p>
  
  <p>I could not find a solution to this so I made my own custom video picker controller. Hopefully someone else can find it useful:
  <a href="https://github.com/saliksyed/CustomVideoCapture" rel="nofollow">https://github.com/saliksyed/CustomVideoCapture</a></p>