Is there a built in mechanism for Miles/KM interchangeability for iPhone?
iphone, localization, objective-c
Solution
Take a look at NSLocale. You should be able to get the current locale using [NSLocale currentLocale]. Then call [theLocale objectForKey: NSLocaleMeasurementSystem] and look at the results which should tell you if the users locale uses the metric system. The docs for NSLocale have a constants section which list all of the values that can be passed to the locale.
Using this you would make your own function that could be used in your program to return your distance in a locale specific way.
Problem
I am currently working on a map-based iPhone application and wish to display some information to the user. For my application, it makes sense to have a setting of some sort where the user can choose Miles or Kilometers. Is there a built in mechanism (maybe similar to string localization) for doing this kind of value switching so that I can avoid an if-block around each time I want to display something to the user?