title: Detect if time format is in 12hr or 24hr format
body: <p>Is there any way to detect if the current device of the app uses 12h our 24h format, so that I can use one NSDateFormatter for 12h and one for 24h depending on the users language/loaction setting? Just Like the UIDatePicker detects and shows the AM/PM picker if it is 12h format.</p>