NSNumberFormatter

Locale
NSNumberFormatter *currencyFormatter = [[NSNumberFormatter alloc] init]; [currencyFormatter setNumberStyle:NSNumberFormatterCurrencyStyle]; int currencyScale = [currencyFormatter maximumFractionDigits];
 * http://en.wikipedia.org/wiki/Decimal_point
 * http://stackoverflow.com/questions/276382/best-way-to-enter-numeric-values-with-decimal-points

Numbers

 * http://iphonedevelopertips.com/cocoa/date-formatter-examples-take-4-setting-locale.html
 * http://iphonedevelopertips.com/cocoa/formatting-numbers-nsnumberformatter-examples.html
 * http://www.iphonesdkarticles.com/2008/11/localizing-iphone-apps-part-1.html

Currency

 * http://stackoverflow.com/questions/856019/localize-currency-for-iphone

Deprecated

 * http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSUserDefaults_Class/Reference/Reference.html#//apple_ref/doc/c_ref/NSDecimalSeparator