blocks|key|1699856|text|使用NSDateFormatter|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1699857|NSDateFormatter+*dateFormatter+=+[[NSDateFormatter+alloc]+init];+++
NSLocale+*enUSPOSIXLocale+=+[NSLocale+localeWithLocaleIdentifier:@"en_US_POSIX"];
[dateFormatter+setLocale:enUSPOSIXLocale];
[dateFormatter+setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
[dateFormatter+setCalendar:[NSCalendar+calendarWithIdentifier:NSCalendarIdentifierGregorian]];

NSDate+*now+=+[NSDate+date];
NSString+*iso8601String+=+[dateFormatter+stringFromDate:now];|code-block|syntax|javascript|1699858|在Swift中：|1699859|let+dateFormatter+=+DateFormatter()
let+enUSPosixLocale+=+Locale(identifier:+"en_US_POSIX")
dateFormatter.locale+=+enUSPosixLocale
dateFormatter.dateFormat+=+"yyyy-MM-dd'T'HH:mm:ssZZZZZ"
dateFormatter.calendar+=+Calendar(identifier:+.gregorian)

let+iso8601String+=+dateFormatter.string(from:+Date())|1699860|entityMap^0|2|F|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

Use <code>NSDateFormatter</code>:

<pre><code>NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
NSLocale *enUSPOSIXLocale = [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"];
[dateFormatter setLocale:enUSPOSIXLocale];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZZZZZ"];
[dateFormatter setCalendar:[NSCalendar calendarWithIdentifier:NSCalendarIdentifierGregorian]];

NSDate *now = [NSDate date];
NSString *iso8601String = [dateFormatter stringFromDate:now];
</code></pre>

And in Swift:

<pre><code>let dateFormatter = DateFormatter()
let enUSPosixLocale = Locale(identifier: "en_US_POSIX")
dateFormatter.locale = enUSPosixLocale
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZZZZZ"
dateFormatter.calendar = Calendar(identifier: .gregorian)

let iso8601String = dateFormatter.string(from: Date())
</code></pre>

blocks|key|1700023|text|作为对maddy答案的补充，ISO+8601的时区格式应为"ZZZZZ“(5乘以Z)，而不是单个"Z”(用于RFC+822格式)。至少在iOS+6上是这样。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1700024|(参见http://www.unicode.org/reports/tr35/tr35-25.html#Date_Format_Patterns)|offset|length|1700025|entityMap|0|LINK|mutability|MUTABLE|url|http://www.unicode.org/reports/tr35/tr35-25.html#Date_Format_Patterns^0|0|3|1X|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

As a complement to maddy's answer, the time zone format should be "ZZZZZ" (5 times Z) for ISO 8601 instead of a single "Z" (which is for RFC 822 format). 
At least on iOS 6.

(see <a href="http://www.unicode.org/reports/tr35/tr35-25.html#Date_Format_Patterns">http://www.unicode.org/reports/tr35/tr35-25.html#Date_Format_Patterns</a>)

blocks|key|1700115|text|所以在NSDate+found+here上使用Sam+Soffee的分类。将这些代码添加到项目中后，您就可以在NSDate上使用单个方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1700116|-+(NSString+*)sam_ISO8601String|code-block|syntax|javascript|1700117|它不仅只有一行，而且比NSDateFormatter方法快得多，因为它是用纯C编写的。|1700118|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/soffes/SAMCategories/blob/master/SAMCategories/NSDate%2BSAMAdditions.h^0|G|4|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

So use Sam Soffee's category on NSDate found <a href="https://github.com/soffes/SAMCategories/blob/master/SAMCategories/NSDate+SAMAdditions.h">here</a>. With that code added to your project, you can from then on use a single method on NSDate:

<pre><code>- (NSString *)sam_ISO8601String
</code></pre>

Not only is it one line, its much faster than the NSDateFormatter approach, since its written in pure C.

blocks|key|1913809|text|基于这个要点：https://github.com/justinmakaila/NSDate-ISO-8601/blob/master/NSDateISO8601.swift，可以使用以下方法将NSDate转换为格式为yyyy-mm-dd‘T’be+:mm:ss.SSSZ的ISO8601日期字符串|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1913810|-(NSString+*)getISO8601String
++++{
++++++++static+NSDateFormatter+*formatter+=+nil;
++++++++if+(!formatter)
++++++++{
++++++++++++formatter+=+[[NSDateFormatter+alloc]+init];
++++++++++++[formatter+setLocale:+[NSLocale+localeWithLocaleIdentifier:@"en_US_POSIX"]];
++++++++++++formatter.timeZone+=+[NSTimeZone+timeZoneWithAbbreviation:+@"UTC"];
++++++++++++[formatter+setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS"];

++++++++}
++++++++NSString+*iso8601String+=+[formatter+stringFromDate:+self];
++++++++return+[iso8601String+stringByAppendingString:+@"Z"];
++++}|code-block|syntax|javascript|1913811|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/justinmakaila/NSDate-ISO-8601/blob/master/NSDateISO8601.swift^0|7|28|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

Based on this gist: <a href="https://github.com/justinmakaila/NSDate-ISO-8601/blob/master/NSDateISO8601.swift" rel="nofollow">https://github.com/justinmakaila/NSDate-ISO-8601/blob/master/NSDateISO8601.swift</a>, the following method can be used to convert NSDate to ISO 8601 date string in the format of yyyy-MM-dd'T'HH:mm:ss.SSSZ 

<pre><code>-(NSString *)getISO8601String
 {
 static NSDateFormatter *formatter = nil;
 if (!formatter)
 {
 formatter = [[NSDateFormatter alloc] init];
 [formatter setLocale: [NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"]];
 formatter.timeZone = [NSTimeZone timeZoneWithAbbreviation: @"UTC"];
 [formatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS"];

 }
 NSString *iso8601String = [formatter stringFromDate: self];
 return [iso8601String stringByAppendingString: @"Z"];
 }
</code></pre>

blocks|key|1700434|text|这稍微简单一点，并将日期放入UTC。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1700435|extension+NSDate
{
++++func+iso8601()+->+String
++++{
++++++++let+dateFormatter+=+NSDateFormatter()
++++++++dateFormatter.timeZone+=+NSTimeZone(name:+"UTC")
++++++++let+iso8601String+=+dateFormatter.stringFromDate(NSDate())
++++++++return+iso8601String
++++}
}

let+date+=+NSDate().iso8601()|code-block|syntax|javascript|1700436|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is a little bit simpler and puts the date into UTC.

<pre><code>extension NSDate
{
 func iso8601() -&gt; String
 {
 let dateFormatter = NSDateFormatter()
 dateFormatter.timeZone = NSTimeZone(name: "UTC")
 let iso8601String = dateFormatter.stringFromDate(NSDate())
 return iso8601String
 }
}

let date = NSDate().iso8601()
</code></pre>

blocks|key|1700493|text|iOS+10引入了一个新的NSISO8601DateFormatter类来处理这个问题。如果你使用的是Swift+3，你的代码应该是这样的：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1700494|let+formatter+=+ISO8601DateFormatter()
let+date+=+formatter.date(from:+"2016-08-26T12:39:00Z")
let+string+=+formatter.string(from:+Date())|code-block|syntax|javascript|1700495|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/reference/foundation/nsiso8601dateformatter^0|D|M|D|M|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

iOS 10 introduces a new <a href="https://developer.apple.com/reference/foundation/nsiso8601dateformatter" rel="noreferrer"><code>NSISO8601DateFormatter</code></a> class to handle just this. If you're using Swift 3, your code would be something like this:

<pre><code>let formatter = ISO8601DateFormatter()
let date = formatter.date(from: "2016-08-26T12:39:00Z")
let string = formatter.string(from: Date())
</code></pre>

blocks|key|1700507|text|使用Swift+3.0和iOS+9.0|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1700508|extension+Date+{
++++private+static+let+jsonDateFormatter:+DateFormatter+=+{
++++++++let+formatter+=+DateFormatter()
++++++++formatter.dateFormat+=+"yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ"
++++++++formatter.locale+=+Locale(identifier:+"en_US_POSIX")
++++++++formatter.timeZone+=+TimeZone(identifier:+"UTC")!
++++++++return+formatter
++++}()

++++var+IOS8601String:+String+{
++++++++get+{
++++++++++++return+Date.jsonDateFormatter.string(from:+self)
++++++++}
++++}

++++init?(fromIOS8601+dateString:+String)+{
++++++++if+let+d+=+Date.jsonDateFormatter.date(from:+dateString)+{
++++++++++++self.init(timeInterval:+0,+since:d)
++++++++}+else+{
++++++++++++return+nil
++++++++}
++++}
}|code-block|syntax|javascript|1700509|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Using Swift 3.0 and iOS 9.0

<pre><code>extension Date {
 private static let jsonDateFormatter: DateFormatter = {
 let formatter = DateFormatter()
 formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZZZZZ"
 formatter.locale = Locale(identifier: "en_US_POSIX")
 formatter.timeZone = TimeZone(identifier: "UTC")!
 return formatter
 }()

 var IOS8601String: String {
 get {
 return Date.jsonDateFormatter.string(from: self)
 }
 }

 init?(fromIOS8601 dateString: String) {
 if let d = Date.jsonDateFormatter.date(from: dateString) {
 self.init(timeInterval: 0, since:d)
 } else {
 return nil
 }
 }
}
</code></pre>

blocks|key|1914082|text|使用iOS+15，您可以获得如下ISO860：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1914083|let+iso8601String+=+Date.now.ISO8601Format()|code-block|syntax|javascript|1914084|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

With iOS 15 you get ISO860 as follows:
<pre><code>let iso8601String = Date.now.ISO8601Format()
</code></pre>

blocks|key|1700643|text|如果你在这里是因为一个相反的搜索结果，这是最简单的解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1700644|let+date+=+ISO8601DateFormatter().date(from:+dateString)|code-block|syntax|javascript|1700645|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you are here because of a search result of the opposite way, here's the easiest solution:
<pre><code>let date = ISO8601DateFormatter().date(from: dateString)
</code></pre>

It's easy enough to get the ISO 8601 date string (for example, <code>2004-02-12T15:19:21+00:00</code>) in PHP via <code>date('c')</code>, but how does one get it in Objective-C (iPhone)? Is there a similarly short way to do it?

Here's the long way I found to do it:

<pre><code>NSDateFormatter* dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
dateFormatter.dateFormat = @"yyyy-MM-dd'T'HH:mm:ssZ";

NSDate *now = [NSDate date];
NSString *formattedDateString = [dateFormatter stringFromDate:now];
NSLog(@"ISO-8601 date: %@", formattedDateString);

// Output: ISO-8601 date: 2013-04-27T13:27:50-0700
</code></pre>

It seems an awful lot of rigmarole for something so central.

How do I get an ISO 8601 date on iOS?

Objective-C

PHP语言

Swift

在PHP语言中通过date('c')获取ISO8601日期字符串(例如，2004-02-12T15:19:21+00:00)非常简单，但是如何在Objective-C (iPhone)中获取它呢？有没有类似的捷径呢？这是我找到的很长的方法：NSDateFormatter* dateFormatter = [[[NSDa...

问如何在iOS上获取ISO8601日期？
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在iOS上获取ISO8601日期？EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何在iOS上获取ISO8601日期？
EN