Question

我最近了解了新的iOS8类NSDateComponentsFormatter。它允许您为时间跨度而不是日期生成时间字符串。很酷。我决定修补它，并编写了一些测试代码，创建了各种时间跨度并记录输出。这是我的代码（英文和法文输出）

  NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];


  NSDateComponentsFormatter* formatter = [[NSDateComponentsFormatter alloc] init];
  formatter.unitsStyle = NSDateComponentsFormatterUnitsStyleFull;
  formatter.calendar = gregorian;

  formatter.allowedUnits = NSCalendarUnitYear + NSCalendarUnitMonth + NSCalendarUnitDay;

  NSDateComponents *components = [[NSDateComponents alloc] init];
  for (int years = 1; years <= 10; years++)
  {
    int days = arc4random_uniform(10);
    components.year = years;
    components.month = 3;
    components.day = days;
    NSString* outputString = [formatter stringFromDateComponents: components];
    NSLog(@"For %02d years %02d days, Date Components string = '%@'", years, days, outputString);
  }

  NSLocale *franceLocale = [NSLocale localeWithLocaleIdentifier: @"fr_FR"];
  gregorian.locale = franceLocale;
  formatter.calendar = gregorian;

  NSLog(@"--------------- French. --------------");
  for (int years = 1; years <= 10; years++)
  {
    int days = arc4random_uniform(10) ;

    components.year = years;
    components.day = days;

    NSString* outputString = [formatter stringFromDateComponents: components];
    NSLog(@"For %02d years %02d days, Date Components string = '%@'", years, days, outputString);
  }

（我没有记录月份值，因为它已修复。）

这是输出：

For 01 years 00 days, Date Components string = '1 year, 3 months'
For 02 years 05 days, Date Components string = '2 years, 3 months, 5 days'
For 03 years 01 days, Date Components string = '3 years, 3 months'
For 04 years 06 days, Date Components string = '4 years, 3 months, 6 days'
For 05 years 07 days, Date Components string = '5 years, 3 months, 7 days'
For 06 years 02 days, Date Components string = '6 years, 3 months, 1 day'
For 07 years 04 days, Date Components string = '7 years, 3 months, 4 days'
For 08 years 02 days, Date Components string = '8 years, 3 months, 2 days'
For 09 years 08 days, Date Components string = '9 years, 3 months, 8 days'
For 10 years 03 days, Date Components string = '10 years, 3 months, 2 days'
--------------- French. --------------
For 01 years 02 days, Date Components string = '1 année, 3 mois et 2 jours'
For 02 years 02 days, Date Components string = '2 années, 3 mois et 2 jours'
For 03 years 05 days, Date Components string = '3 années, 3 mois et 5 jours'
For 04 years 03 days, Date Components string = '4 années, 3 mois et 3 jours'
For 05 years 04 days, Date Components string = '5 années, 3 mois et 4 jours'
For 06 years 04 days, Date Components string = '6 années, 3 mois et 4 jours'
For 07 years 04 days, Date Components string = '7 années, 3 mois et 3 jours'
For 08 years 08 days, Date Components string = '8 années, 3 mois et 8 jours'
For 09 years 05 days, Date Components string = '9 années, 3 mois et 5 jours'
For 10 years 02 days, Date Components string = '10 années, 3 mois et 2 jours'

请注意，在某些情况下，格式化程序输出中的输出天数值与输入的天数值不匹配。

有人知道这里出了什么问题吗？对我来说，这看起来很像OS /框架错误。

编辑：

我在Mac应用程序中运行我的测试代码，在OS X版本10.10.5下是否有其他人运行10.10.5并且可以尝试吗？

对于8.1 sim，我也得到了一个错误的答案。（输入值为07年，3个月，06天，日期组件字符串=＆＃39; 7年，3个月，5天＆＃39;）

Answer 1

似乎NSDateComponentsFormatter的iOS 8.x和Mac OS 10.10版本有问题。对于那些操作系统版本中的某些日期，我得到（间歇！）不同的错误结果，但是最新操作系统版本的结果是正确的。

唉...

从NSDateComponentsFormatter获取棘手的结果

编辑：

1 个答案: