title: Measure size of each char in an NSString
body: <p>We have [NSString sizeWithFont:] which returns the size of the entire string.</p>
  
  <p>What about getting an array of the sizes of each individual character within the string?</p>
  
  <p>How would you do that (besides tokenizing the string and calling sizeWithFont for each)?</p>
  
  <p>Best,
  Vance</p>