title: Converting from std::string to NSString
body: <p>How can I convert from std::string to NSString in this case?</p>
  
  <pre><code>void Piles::imagePlacer(Card card, int xCoord, int yCoord) {
      string cardType = card.toString();
  
      UIImageView *cardImg = [[UIImageView alloc]
                   initWithImage:cardType];
      cardImg.frame = CGRectMake(xCoord, yCoord, 126, 190);
      [self.view addSubview:cardImg];
  }
  </code></pre>
  
  <p>I want to use a string as the name of the image (assuming I have a list of UIImages somewhere with names that correspond to all possible strings stored in cardType)?</p>