格里高利到希伯来语 [英] Gregorian to Hebrew

问题描述

如何将格里高利日转换为等效的希伯来日期？
另外请告诉我们这些日历，因为我对这些日历知之甚少。

How to convert a gregorian date into the equivalent hebrew date? Also please tell about these calendars as I am not having much knowledge of these.

推荐答案

有一个方便的课程叫做 NSCalendar 。你创建一个这样的：

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

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

获得日历对象后，您可以使用它们将日期转换为各种表示形式：

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);

在我的机器上，这个日志：

On my machine, this logs:

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，请使用 NSDateFormatter ：

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];

此日志：

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

看起来 NSDateFormatter 正在使用格里高利日期，但至少它有正确的月份名称，对吗？

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

编辑

实际上，我傻了。如果您只设置 NSDateFormatter 的日历，则无需担心转换日期。请参阅：

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];

此日志：

hebrew: Shevat 4, 5771

好多了！可可不是很棒？

Much better! Isn't Cocoa awesome?

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