定位已用时间

Question

在我的应用程序中，我需要以mm：ss格式显示已用时间。现在，我们必须对应用程序进行本地化。我们应该如何本地化这段时间？

Answer 1

您要使用的类NSDateFormatter：

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