使用目前locale的資訊

//目前系統語言

NSString * language = [[NSLocale preferredLanguages] objectAtIndex:0];

//當地的貨幣格式

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];

    [numberFormatter setNumberStyle:NSNumberFormatterCurrencyStyle];

    [numberFormatter setLocale:[NSLocale systemLocale]];

    NSString *formattedString = [numberFormatter stringFromNumber:@100];