localizando el tiempo transcurrido

Question

En mi aplicación necesito mostrar el tiempo transcurrido en formato mm: ss. Ahora, tenemos que localizar la aplicación. ¿Cómo debemos localizar este tiempo transcurrido?

Answer 1

Usted desea utilizar el NSDateFormatter clase:

http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSDateFormatter_Class/Reference/Reference.html

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setTimeStyle:NSDateFormatterShortStyle]; 
[dateFormatter setDateStyle:NSDateFormatterNoStyle]; 

NSDate *date = [NSDate dateWithTimeIntervalSinceReferenceDate:118800]; 

// Specifying a locale only for the purpose of this example 
// if you don't specify one, it will use the user's locale, which is what you want 
NSLocale *usLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]; 
[dateFormatter setLocale:usLocale]; 

NSLog(@"Date for locale %@: %@", 
     [[dateFormatter locale] localeIdentifier], [dateFormatter stringFromDate:date]); 
// Output: 
// Date for locale en_US: 4:00 AM