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公历到希伯来语

发布于 2024-10-11 08:07:05 字数 48 浏览 2 评论 0原文

如何将公历日期转换为等效的希伯来日期？另外请告诉我这些日历，因为我对此了解不多。

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亂 2024-10-18 08:07:05

有一个方便的类，名为 <代码>NSCalendar。您可以这样创建一个：

NSCalendar * gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSCalendar * hebrew = [[NSCalendar alloc] initWithCalendarIdentifier:NSHebrewCalendar];

一旦获得了日历对象，您就可以使用它们将日期转换为各种表示形式：

NSDate * date = [NSDate date];
NSDateComponents * components = [gregorian components:NSUIntegerMax fromDate:date];
NSDate * hebrewDate = [hebrew dateFromComponents:components];

NSLog(@"date: %@", date);
NSLog(@"hebrew: %@", hebrewDate);

在我的机器上，此日志：

date: 2011-01-09 23:20:39 -0800
hebrew: 1751-09-25 23:20:39 -0800

如果您想将内容转换为更易读的格式，您可以使用 < a href="http://developer.apple.com/library/ios/#documentation/cocoa/reference/Foundation/Classes/NSDateFormatter_Class/Reference/Reference.html" rel="noreferrer">NSDateFormatter：

NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterLongStyle];
[formatter setTimeStyle:NSDateFormatterNoStyle];
[formatter setCalendar:gregorian]; //this is usually unnecessary; it's here for clarity

NSLog(@"date: %@", [formatter stringFromDate:date]);

[formatter setCalendar:hebrew];

NSLog(@"hebrew: %@", [formatter stringFromDate:hebrewDate]);
[formatter release];

此日志：

date: January 9, 2011
hebrew: Tishri 9, 2011

看起来 NSDateFormatter 正在使用公历日期，但至少它有正确的月份名称，对吗？

编辑

实际上，我搞砸了。如果您只是设置NSDateFormatter的日历，则根本不必担心日期转换。请参阅：

NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterLongStyle];
[formatter setTimeStyle:NSDateFormatterNoStyle];
[formatter setCalendar:hebrew];

NSLog(@"hebrew: %@", [formatter stringFromDate:[NSDate date]]);
[formatter release];

此日志：

hebrew: Shevat 4, 5771

好多了！可可不是很棒吗？

There's a handy class called NSCalendar. You create one like this:

NSCalendar * gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSCalendar * hebrew = [[NSCalendar alloc] initWithCalendarIdentifier:NSHebrewCalendar];

Once you've got the calendar objects, you can use them to convert a date around to various representations:

NSDate * date = [NSDate date];
NSDateComponents * components = [gregorian components:NSUIntegerMax fromDate:date];
NSDate * hebrewDate = [hebrew dateFromComponents:components];

NSLog(@"date: %@", date);
NSLog(@"hebrew: %@", hebrewDate);

On my machine, this logs:

date: 2011-01-09 23:20:39 -0800
hebrew: 1751-09-25 23:20:39 -0800

If you want to convert stuff to a more readable format, you use NSDateFormatter:

NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterLongStyle];
[formatter setTimeStyle:NSDateFormatterNoStyle];
[formatter setCalendar:gregorian]; //this is usually unnecessary; it's here for clarity

NSLog(@"date: %@", [formatter stringFromDate:date]);

[formatter setCalendar:hebrew];

NSLog(@"hebrew: %@", [formatter stringFromDate:hebrewDate]);
[formatter release];

This logs:

date: January 9, 2011
hebrew: Tishri 9, 2011

It would appear that NSDateFormatter is using the gregorian date, but at least it's got the right month name, right?

edit

Actually, I goofed. If you just set the calendar of the NSDateFormatter, you don't have to worry about converting the date at all. See:

NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterLongStyle];
[formatter setTimeStyle:NSDateFormatterNoStyle];
[formatter setCalendar:hebrew];

NSLog(@"hebrew: %@", [formatter stringFromDate:[NSDate date]]);
[formatter release];

This logs: