NSCalendar：一个月内获得几周的问题答案

【问题标题】：NSCalendar: Problem getting weeks in a monthNSCalendar：一个月内获得几周的问题
【发布时间】：2010-03-14 17:31:45
【问题描述】：

我正在创建各种日历控件...

我需要知道的一件事是一个月有多少周...

所以NSCalendarrangeOfUnit:inUnit:forDate似乎正是我需要的......

除了我注意到一些似乎不对劲而且我无法完全弄清楚为什么会发生这种情况...

以下代码...

NSCalendar *calendar = [NSCalendar currentCalendar];

NSDateComponents *dateComponents = [[NSDateComponents alloc] init];
[dateComponents setYear: 2010];
[dateComponents setDay: 1];

for (int x=1; x<=12; x++)
{
    [dateComponents setMonth: x];

    NSDate *date = [calendar dateFromComponents:dateComponents];
    NSLog(@"Date: %@", date);

    NSRange range = [calendar rangeOfUnit: NSWeekCalendarUnit
                                   inUnit: NSMonthCalendarUnit
                                  forDate:date];

    NSLog(@"%d Weeks in Month %d", range.length, [dateComponents month]);

}

正在返回以下调试消息...

2010-03-14 13:08:10.350 Scrap[4256:207] Date: 2010-01-01 00:00:00 -0500
2010-03-14 13:08:10.351 Scrap[4256:207] 5 Weeks in Month 1
2010-03-14 13:08:10.352 Scrap[4256:207] Date: 2010-02-01 00:00:00 -0500
2010-03-14 13:08:10.352 Scrap[4256:207] 4 Weeks in Month 2
2010-03-14 13:08:10.353 Scrap[4256:207] Date: 2010-03-01 00:00:00 -0500
2010-03-14 13:08:10.353 Scrap[4256:207] 5 Weeks in Month 3
2010-03-14 13:08:10.354 Scrap[4256:207] Date: 2010-04-01 00:00:00 -0400
2010-03-14 13:08:10.355 Scrap[4256:207] 5 Weeks in Month 4
2010-03-14 13:08:10.356 Scrap[4256:207] Date: 2010-05-01 00:00:00 -0400
2010-03-14 13:08:10.357 Scrap[4256:207] 5 Weeks in Month 5
2010-03-14 13:08:10.358 Scrap[4256:207] Date: 2010-06-01 00:00:00 -0400
2010-03-14 13:08:10.358 Scrap[4256:207] 5 Weeks in Month 6
2010-03-14 13:08:10.359 Scrap[4256:207] Date: 2010-07-01 00:00:00 -0400
2010-03-14 13:08:10.360 Scrap[4256:207] 5 Weeks in Month 7
2010-03-14 13:08:10.361 Scrap[4256:207] Date: 2010-08-01 00:00:00 -0400
2010-03-14 13:08:10.364 Scrap[4256:207] 5 Weeks in Month 8
2010-03-14 13:08:10.364 Scrap[4256:207] Date: 2010-09-01 00:00:00 -0400
2010-03-14 13:08:10.365 Scrap[4256:207] 5 Weeks in Month 9
2010-03-14 13:08:10.366 Scrap[4256:207] Date: 2010-10-01 00:00:00 -0400
2010-03-14 13:08:10.366 Scrap[4256:207] 5 Weeks in Month 10
2010-03-14 13:08:10.367 Scrap[4256:207] Date: 2010-11-01 00:00:00 -0400
2010-03-14 13:08:10.367 Scrap[4256:207] 5 Weeks in Month 11
2010-03-14 13:08:10.369 Scrap[4256:207] Date: 2010-12-01 00:00:00 -0500
2010-03-14 13:08:10.369 Scrap[4256:207] 52 Weeks in Month 12

我不明白为什么我在第 12 个月有 52 周。

有什么线索吗？

2010 年 3 月 20 日编辑：

看看我如何无法使用rangeOfUnit:inUnit:forDate 来计算一个月的周数。我决定找出一种不同的方法来计算相同的值。

我认为我应该以非公历本地化的方式执行此操作，因此我尝试从获取一周中的天数开始，但我得到了一周中 28 天的结果。所以我开始写更多的代码来找出原因......

我想确保我正在使用的 NSCalendar 类型实际上是我应该得到的......这让我发现了一些不同......

NSCalendar *currentCalendar = [NSCalendar currentCalendar];

NSLog(@"Calendar with 'currentCalendar' Identifier: %@", 
      [currentCalendar calendarIdentifier]);

NSCalendar *calendarWithIdentifier = [[[NSCalendar alloc] initWithCalendarIdentifier: NSGregorianCalendar] autorelease];

NSLog(@"Calendar created with identifier Identifier: %@", 
      [calendarWithIdentifier calendarIdentifier]);

NSDate *now = [[NSDate alloc] init];

NSDateComponents *currentMonth = [currentCalendar components: NSMonthCalendarUnit | NSYearCalendarUnit
                                                    fromDate: now];

NSDate *currentMonthDate = [currentCalendar dateFromComponents: currentMonth];

NSRange daysInWeekRange = [currentCalendar rangeOfUnit: NSDayCalendarUnit
                                                inUnit: NSWeekCalendarUnit
                                               forDate: currentMonthDate];

NSLog(@"CurrentCalendar: Length:%u Location:%u", daysInWeekRange.length, daysInWeekRange.location);

currentMonth = [calendarWithIdentifier components: NSMonthCalendarUnit | NSYearCalendarUnit 
                                         fromDate: now];

currentMonthDate = [calendarWithIdentifier dateFromComponents: currentMonth];

daysInWeekRange = [calendarWithIdentifier rangeOfUnit: NSDayCalendarUnit
                                               inUnit: NSWeekCalendarUnit
                                              forDate: currentMonthDate];

NSLog(@"GregorianCalendar: Length:%u Location:%u", daysInWeekRange.length, daysInWeekRange.location);

这让我得到了以下日志结果...

2010-03-20 21:02:27.245 Scrap[52189:207] Calendar with 'currentCalendar' Identifier: gregorian
2010-03-20 21:02:27.246 Scrap[52189:207] Calendar created with identifier Identifier: gregorian
2010-03-20 21:02:27.248 Scrap[52189:207] CurrentCalendar: Length:28 Location:1
2010-03-20 21:02:27.249 Scrap[52189:207] GregorianCalendar: Length:7 Location:1

根据@CarlNorum 的经验，我将代码sn-p 编译为10.6 Cocoa 应用程序，得到以下...

2010-03-20 21:05:35.636 ScrapCocoa[52238:a0f] Calendar with 'currentCalendar' Identifier: gregorian
2010-03-20 21:05:35.636 ScrapCocoa[52238:a0f] Calendar created with identifier Identifier: gregorian
2010-03-20 21:05:35.637 ScrapCocoa[52238:a0f] CurrentCalendar: Length:6 Location:1
2010-03-20 21:05:35.638 ScrapCocoa[52238:a0f] GregorianCalendar: Length:7 Location:1

我看到了希望，将 NSCalendar 实例显式创建为公历会导致我原来的问题得到更好的结果......所以我修改了原来的代码

NSCalendar *currentCalendar = [NSCalendar currentCalendar];

NSLog(@"Calendar with 'currentCalendar' Identifier: %@", 
      [currentCalendar calendarIdentifier]);

NSCalendar *calendarWithIdentifier = [[[NSCalendar alloc] initWithCalendarIdentifier: NSGregorianCalendar] autorelease];

NSLog(@"Calendar created with identifier Identifier: %@", 
      [calendarWithIdentifier calendarIdentifier]);

NSDateComponents *dateComponents = [[[NSDateComponents alloc] init] autorelease];
[dateComponents setYear: 2010];
[dateComponents setDay: 1];

for (int x=1; x<=12; x++)
{
    [dateComponents setMonth: x];

    NSDate *date = [currentCalendar dateFromComponents: dateComponents];
    NSRange range = [currentCalendar rangeOfUnit: NSWeekCalendarUnit
                                          inUnit: NSMonthCalendarUnit
                                         forDate: date];

    NSLog(@"CurrentCalendar Date: %@", date);
    NSLog(@"CurrentCalendar: %d Weeks in Month %d", range.length, [dateComponents month]);

    date = [calendarWithIdentifier dateFromComponents: dateComponents];

    range = [calendarWithIdentifier rangeOfUnit: NSWeekCalendarUnit
                                         inUnit: NSMonthCalendarUnit
                                        forDate: date];

    NSLog(@"GregorianCalendar Date: %@", date);
    NSLog(@"GregorianCalendar: %d Weeks in Month %d", range.length, [dateComponents month]);

}

很遗憾，使用以这种方式创建的日历并没有返回不同的结果。

2010-03-20 21:15:40.465 Scrap[52367:207] Calendar with 'currentCalendar' Identifier: gregorian
2010-03-20 21:15:40.466 Scrap[52367:207] Calendar created with identifier Identifier: gregorian
2010-03-20 21:15:40.468 Scrap[52367:207] CurrentCalendar Date: 2010-01-01 00:00:00 -0500
2010-03-20 21:15:40.468 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 1
2010-03-20 21:15:40.469 Scrap[52367:207] GregorianCalendar Date: 2010-01-01 00:00:00 -0500
2010-03-20 21:15:40.470 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 1
2010-03-20 21:15:40.471 Scrap[52367:207] CurrentCalendar Date: 2010-02-01 00:00:00 -0500
2010-03-20 21:15:40.471 Scrap[52367:207] CurrentCalendar: 4 Weeks in Month 2
2010-03-20 21:15:40.472 Scrap[52367:207] GregorianCalendar Date: 2010-02-01 00:00:00 -0500
2010-03-20 21:15:40.473 Scrap[52367:207] GregorianCalendar: 4 Weeks in Month 2
2010-03-20 21:15:40.473 Scrap[52367:207] CurrentCalendar Date: 2010-03-01 00:00:00 -0500
2010-03-20 21:15:40.474 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 3
2010-03-20 21:15:40.475 Scrap[52367:207] GregorianCalendar Date: 2010-03-01 00:00:00 -0500
2010-03-20 21:15:40.475 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 3
2010-03-20 21:15:40.476 Scrap[52367:207] CurrentCalendar Date: 2010-04-01 00:00:00 -0400
2010-03-20 21:15:40.477 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 4
2010-03-20 21:15:40.478 Scrap[52367:207] GregorianCalendar Date: 2010-04-01 00:00:00 -0400
2010-03-20 21:15:40.479 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 4
2010-03-20 21:15:40.480 Scrap[52367:207] CurrentCalendar Date: 2010-05-01 00:00:00 -0400
2010-03-20 21:15:40.480 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 5
2010-03-20 21:15:40.482 Scrap[52367:207] GregorianCalendar Date: 2010-05-01 00:00:00 -0400
2010-03-20 21:15:40.482 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 5
2010-03-20 21:15:40.483 Scrap[52367:207] CurrentCalendar Date: 2010-06-01 00:00:00 -0400
2010-03-20 21:15:40.483 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 6
2010-03-20 21:15:40.484 Scrap[52367:207] GregorianCalendar Date: 2010-06-01 00:00:00 -0400
2010-03-20 21:15:40.485 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 6
2010-03-20 21:15:40.485 Scrap[52367:207] CurrentCalendar Date: 2010-07-01 00:00:00 -0400
2010-03-20 21:15:40.486 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 7
2010-03-20 21:15:40.486 Scrap[52367:207] GregorianCalendar Date: 2010-07-01 00:00:00 -0400
2010-03-20 21:15:40.487 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 7
2010-03-20 21:15:40.488 Scrap[52367:207] CurrentCalendar Date: 2010-08-01 00:00:00 -0400
2010-03-20 21:15:40.488 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 8
2010-03-20 21:15:40.489 Scrap[52367:207] GregorianCalendar Date: 2010-08-01 00:00:00 -0400
2010-03-20 21:15:40.489 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 8
2010-03-20 21:15:40.490 Scrap[52367:207] CurrentCalendar Date: 2010-09-01 00:00:00 -0400
2010-03-20 21:15:40.491 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 9
2010-03-20 21:15:40.491 Scrap[52367:207] GregorianCalendar Date: 2010-09-01 00:00:00 -0400
2010-03-20 21:15:40.492 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 9
2010-03-20 21:15:40.493 Scrap[52367:207] CurrentCalendar Date: 2010-10-01 00:00:00 -0400
2010-03-20 21:15:40.493 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 10
2010-03-20 21:15:40.494 Scrap[52367:207] GregorianCalendar Date: 2010-10-01 00:00:00 -0400
2010-03-20 21:15:40.494 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 10
2010-03-20 21:15:40.495 Scrap[52367:207] CurrentCalendar Date: 2010-11-01 00:00:00 -0400
2010-03-20 21:15:40.496 Scrap[52367:207] CurrentCalendar: 5 Weeks in Month 11
2010-03-20 21:15:40.496 Scrap[52367:207] GregorianCalendar Date: 2010-11-01 00:00:00 -0400
2010-03-20 21:15:40.497 Scrap[52367:207] GregorianCalendar: 5 Weeks in Month 11
2010-03-20 21:15:40.498 Scrap[52367:207] CurrentCalendar Date: 2010-12-01 00:00:00 -0500
2010-03-20 21:15:40.498 Scrap[52367:207] CurrentCalendar: 52 Weeks in Month 12
2010-03-20 21:15:40.499 Scrap[52367:207] GregorianCalendar Date: 2010-12-01 00:00:00 -0500
2010-03-20 21:15:40.500 Scrap[52367:207] GregorianCalendar: 52 Weeks in Month 12

为 Cocoa 编译代码只是为了好玩，实际上很有趣... 因为结果真的很不一样

2010-03-20 21:11:24.610 ScrapCocoa[52313:a0f] Calendar with 'currentCalendar' Identifier: gregorian
2010-03-20 21:11:24.611 ScrapCocoa[52313:a0f] Calendar created with identifier Identifier: gregorian
2010-03-20 21:11:24.613 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-01-01 00:00:00 -0500
2010-03-20 21:11:24.613 ScrapCocoa[52313:a0f] CurrentCalendar: 6 Weeks in Month 1
2010-03-20 21:11:24.614 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-01-01 00:00:00 -0500
2010-03-20 21:11:24.615 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 1
2010-03-20 21:11:24.616 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-02-01 00:00:00 -0500
2010-03-20 21:11:24.616 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 2
2010-03-20 21:11:24.617 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-02-01 00:00:00 -0500
2010-03-20 21:11:24.618 ScrapCocoa[52313:a0f] GregorianCalendar: 4 Weeks in Month 2
2010-03-20 21:11:24.619 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-03-01 00:00:00 -0500
2010-03-20 21:11:24.619 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 3
2010-03-20 21:11:24.620 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-03-01 00:00:00 -0500
2010-03-20 21:11:24.621 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 3
2010-03-20 21:11:24.622 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-04-01 00:00:00 -0400
2010-03-20 21:11:24.622 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 4
2010-03-20 21:11:24.623 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-04-01 00:00:00 -0400
2010-03-20 21:11:24.623 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 4
2010-03-20 21:11:24.624 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-05-01 00:00:00 -0400
2010-03-20 21:11:24.625 ScrapCocoa[52313:a0f] CurrentCalendar: 6 Weeks in Month 5
2010-03-20 21:11:24.625 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-05-01 00:00:00 -0400
2010-03-20 21:11:24.626 ScrapCocoa[52313:a0f] GregorianCalendar: 6 Weeks in Month 5
2010-03-20 21:11:24.627 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-06-01 00:00:00 -0400
2010-03-20 21:11:24.627 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 6
2010-03-20 21:11:24.628 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-06-01 00:00:00 -0400
2010-03-20 21:11:24.628 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 6
2010-03-20 21:11:24.629 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-07-01 00:00:00 -0400
2010-03-20 21:11:24.630 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 7
2010-03-20 21:11:24.630 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-07-01 00:00:00 -0400
2010-03-20 21:11:24.631 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 7
2010-03-20 21:11:24.632 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-08-01 00:00:00 -0400
2010-03-20 21:11:24.632 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 8
2010-03-20 21:11:24.633 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-08-01 00:00:00 -0400
2010-03-20 21:11:24.633 ScrapCocoa[52313:a0f] GregorianCalendar: 6 Weeks in Month 8
2010-03-20 21:11:24.634 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-09-01 00:00:00 -0400
2010-03-20 21:11:24.635 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 9
2010-03-20 21:11:24.636 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-09-01 00:00:00 -0400
2010-03-20 21:11:24.636 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 9
2010-03-20 21:11:24.637 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-10-01 00:00:00 -0400
2010-03-20 21:11:24.637 ScrapCocoa[52313:a0f] CurrentCalendar: 6 Weeks in Month 10
2010-03-20 21:11:24.638 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-10-01 00:00:00 -0400
2010-03-20 21:11:24.639 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 10
2010-03-20 21:11:24.640 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-11-01 00:00:00 -0400
2010-03-20 21:11:24.640 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 11
2010-03-20 21:11:24.641 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-11-01 00:00:00 -0400
2010-03-20 21:11:24.641 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 11
2010-03-20 21:11:24.642 ScrapCocoa[52313:a0f] CurrentCalendar Date: 2010-12-01 00:00:00 -0500
2010-03-20 21:11:24.642 ScrapCocoa[52313:a0f] CurrentCalendar: 5 Weeks in Month 12
2010-03-20 21:11:24.643 ScrapCocoa[52313:a0f] GregorianCalendar Date: 2010-12-01 00:00:00 -0500
2010-03-20 21:11:24.644 ScrapCocoa[52313:a0f] GregorianCalendar: 5 Weeks in Month 12

我想这是我放弃的时候......

【问题讨论】：

我刚刚创建了一个新项目并运行了该代码，它的行为符合预期。那是您看到失败的确切代码吗？
你在 12 月有 52 周？
@AngrySpade，不，我知道5 weeks in Month 12。
这是我在 52 周内得到的确切代码。
顺便说一句，AngrySpade：（1）您正在泄漏日期组件对象，并且（2）您假设当前日历有 12 个月。用户当前的日历可能不是公历。

标签： iphone objective-c cocoa nscalendar

【解决方案1】：

使用 10.6 SDK 尝试了此代码，它似乎可以工作。

2010-03-14 19:11:49.424 无标题[61397:a0f] 日期：2010-01-01 00:00:00 -0500 2010-03-14 19:11:49.425 无标题[61397:a0f] 第 1 个月的 6 周 2010-03-14 19:11:49.426 无标题[61397:a0f] 日期：2010-02-01 00:00:00 -0500 2010-03-14 19:11:49.427 无标题[61397:a0f] 第 2 个月的 5 周 2010-03-14 19:11:49.428 无标题[61397:a0f] 日期：2010-03-01 00:00:00 -0500 2010-03-14 19:11:49.429 无标题[61397:a0f] 第 3 个月的 5 周 2010-03-14 19:11:49.429 无标题[61397:a0f] 日期：2010-04-01 00:00:00 -0400 2010-03-14 19:11:49.430 无标题[61397:a0f] 第 4 个月的 5 周 2010-03-14 19:11:49.431 无标题[61397:a0f] 日期：2010-05-01 00:00:00 -0400 2010-03-14 19:11:49.431 无标题[61397:a0f] 第 5 个月的 6 周 2010-03-14 19:11:49.432 无标题[61397:a0f] 日期：2010-06-01 00:00:00 -0400 2010-03-14 19:11:49.433 无标题[61397:a0f] 第 6 个月的 5 周 2010-03-14 19:11:49.434 无标题[61397:a0f] 日期：2010-07-01 00:00:00 -0400 2010-03-14 19:11:49.434 无标题[61397:a0f] 第 7 个月的 5 周 2010-03-14 19:11:49.435 无标题[61397:a0f] 日期：2010-08-01 00:00:00 -0400 2010-03-14 19:11:49.436 无标题[61397:a0f] 第 8 个月的 5 周 2010-03-14 19:11:49.437 无标题[61397:a0f] 日期：2010-09-01 00:00:00 -0400 2010-03-14 19:11:49.437 无标题[61397:a0f] 第 9 个月的 5 周 2010-03-14 19:11:49.438 无标题[61397:a0f] 日期：2010-10-01 00:00:00 -0400 2010-03-14 19:11:49.439 无标题[61397:a0f] 第 10 个月的 6 周 2010-03-14 19:11:49.439 无标题[61397:a0f] 日期：2010-11-01 00:00:00 -0400 2010-03-14 19:11:49.440 无标题[61397:a0f] 第 11 个月的 5 周 2010-03-14 19:11:49.441 无标题[61397:a0f] 日期：2010-12-01 00:00:00 -0500 2010-03-14 19:11:49.441 无标题[61397:a0f] 第 12 个月的 5 周

我使用 iPhone SDK 进行了尝试，得到了与您相同的输出。目前尚不清楚 iPhone SDK 是否也在其他许多月份输出正确的值。例如，我同意 10.6 SDK 的答案，即 Jan. 有 6 周。

我没有发现您的代码有任何明显错误。

我可能首先建议前往http://bugreport.apple.com 并提交一个错误。

您也可以前往 Apple 的私人开发者论坛 (http://developer.apple.com/devforums/) 并尝试在那里提问。

当然，您也可以向 Apple 提交技术支持事件 (dts@apple.com - http://developer.apple.com/programs/adcbenefits/) ...您可以直接与 Apple 工程师讨论此问题。

【讨论】：

我在论坛上问过...我们会看看有什么结果。 devforums.apple.com/thread/41850
我收到了更多确认这是一个错误...提交了一个苹果错误...bugreport.apple.com/cgi-bin/WebObjects/RadarWeb.woa/110/wo/…
@AngrySpade：该 URL 在该会话之外没有任何意义。错误编号会更有用。