blocks|key|25365|text|UUID在Core+Foundation中由CFUUID库处理。您要查找的函数是CFUUIDCreate。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|25366|仅供进一步搜索:这些通常被称为GUID，术语GUID在Microsoft之外并不经常使用。你可能会更幸运地找到那个搜索词。|25367|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/documentation/CoreFoundation/Reference/CFUUIDRef/Reference/reference.html#//apple_ref/c/func/CFUUIDCreate^0|14|C|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

UUIDs are handled in Core Foundation, by the CFUUID library. The function you are looking for is <a href="http://Developer.Apple.Com/documentation/CoreFoundation/Reference/CFUUIDRef/Reference/reference.html#//apple_ref/c/func/CFUUIDCreate" rel="noreferrer">CFUUIDCreate</a>.
FYI for further searches: these are most commonly known as UUIDs, the term GUID isn't used very often outside of the Microsoft world. You might have more luck with that search term.

blocks|key|876433|text|至少在MacOSX+10.5.x上，您可以使用命令行工具"uuidgen“来获取字符串，例如|type|unstyled|depth|inlineStyleRanges|entityRanges|data|876434|$+uuidgen|876435|054209C4-3873-4679-8104-3C18AE780512|876436|这个命令还有一个选项-hdr，可以方便地在标题样式中生成它|876437|有关更多信息，请参阅手册页。|876438|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

At least on MacOSX 10.5.x you might use the command line tool "uuidgen" to get your string
 e.g.

$ uuidgen

054209C4-3873-4679-8104-3C18AE780512

there's also an option -hdr with this comand that conveniently generates it in header style

See man-page for further infos.

blocks|key|4092751|text|下面是一些代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4092752|对于字符串UUID，下面的类方法应该可以完成此任务：|4092753|%2B(NSString*)UUIDString+{
++++CFUUIDRef+theUUID+=+CFUUIDCreate(NULL);
++++CFStringRef+string+=+CFUUIDCreateString(NULL,+theUUID);
++++CFRelease(theUUID);
++++return+[(NSString+*)string+autorelease];
}|code-block|syntax|javascript|4092754|如果你真的想要字节(而不是字符串)：|4092755|%2B(CFUUIDBytes)UUIDBytes+{
++++CFUUIDRef+theUUID+=+CFUUIDCreate(NULL);
++++CFUUIDBytes+bytes+=+CFUUIDGetUUIDBytes(theUUID);
++++CFRelease(theUUID);
++++return+bytes;
}|4092756|其中CFUUIDBytes是UUID字节的struct。|offset|length|4092757|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/documentation/CoreFoundation/Reference/CFUUIDRef/Reference/reference.html#//apple_ref/doc/c_ref/CFUUIDBytes^0|0|0|0|0|0|L|6|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

Some code:

For a string UUID, the following class method should do the trick:

<pre><code>+(NSString*)UUIDString {
 CFUUIDRef theUUID = CFUUIDCreate(NULL);
 CFStringRef string = CFUUIDCreateString(NULL, theUUID);
 CFRelease(theUUID);
 return [(NSString *)string autorelease];
}
</code></pre>

if you really want the bytes (not the string):

<pre><code>+(CFUUIDBytes)UUIDBytes {
 CFUUIDRef theUUID = CFUUIDCreate(NULL);
 CFUUIDBytes bytes = CFUUIDGetUUIDBytes(theUUID);
 CFRelease(theUUID);
 return bytes;
}
</code></pre>

where CFUUIDBytes is a <a href="http://developer.apple.com/documentation/CoreFoundation/Reference/CFUUIDRef/Reference/reference.html#//apple_ref/doc/c_ref/CFUUIDBytes" rel="noreferrer">struct</a> of the UUID bytes.

blocks|key|3247336|text|或者是uuidgen命令行工具。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3247337|entityMap^0|3|7|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

or there's the <code>uuidgen</code> command line tool.

blocks|key|4092827|text|从10.8开始，您还可以使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4092828|NSString+*uuidString+=+[[NSUUID+UUID]+UUIDString];|code-block|syntax|javascript|4092829|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|$]]

Since 10.8 you could also use:
<pre><code>NSString *uuidString = [[NSUUID UUID] UUIDString];
</code></pre>

blocks|key|881416|text|查看Wikipedia文章和Core+Foundation页面。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|881417|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/UUID|1|http://en.wikipedia.org/wiki/Core_Foundation^0|2|9|0|E|F|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

Check out the <a href="http://en.wikipedia.org/wiki/UUID" rel="nofollow noreferrer" title="GUID">Wikipedia</a> article and the <a href="http://en.wikipedia.org/wiki/Core_Foundation" rel="nofollow noreferrer" title="Wikipedia:Core Foundation">Core Foundation</a> page.

blocks|key|3247376|text|从10.3左右开始，您可以使用[[NSProcessInfo+processInfo]+globallyUniqueString]。然而，虽然这当前会生成一个UUID，但它从来没有也不能保证这样做，所以如果您真的需要一个UUID，而不是任何唯一的字符串，那么您应该使用CFUUID。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3247377|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.apple.com/library/mac/documentation/cocoa/reference/Foundation/Classes/NSProcessInfo_Class/Reference/Reference.html#//apple_ref/occ/instm/NSProcessInfo/globallyUniqueString^0|F|1E|F|1E|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

Since 10.3 or so, you can use <a href="https://developer.apple.com/library/mac/documentation/cocoa/reference/Foundation/Classes/NSProcessInfo_Class/Reference/Reference.html#//apple_ref/occ/instm/NSProcessInfo/globallyUniqueString" rel="nofollow noreferrer"><code>[[NSProcessInfo processInfo] globallyUniqueString]</code></a>. However, while this currently generates a UUID, it never has been and still isn't guaranteed to do that, so if you really need a UUID and not just any unique string, you should use CFUUID.

blocks|key|25541|text|您可以在~/.bash_profile中创建别名，并从终端调用uuid：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|25542|alias+uuid="uuidgen+%7C+tr+'[:upper:]'+'[:lower:]'"|code-block|syntax|javascript|25543|entityMap^0|4|F|V|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

You can create an alias in the <code>~/.bash_profile</code> and call <code>uuid</code> from the terminal:
<pre><code>alias uuid=&quot;uuidgen | tr '[:upper:]' '[:lower:]'&quot;
</code></pre>

Is there a built in function equivalent to .NET's

<pre><code>Guid.NewGuid();
</code></pre>

in Cocoa?

My desire is to produce a string along the lines of <code>550e8400-e29b-41d4-a716-446655440000</code> which represents a unique identifier.

Is there a method to generate a standard 128bit GUID (UUID) on the Mac?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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是否有一个与.NET的内置函数等效的函数Guid.NewGuid();在可可？我的愿望是按照550e8400-e29b-41d4-a716-446655440000的方式生成一个代表唯一标识符的字符串。

问有没有办法在Mac上生成标准的128位GUID (UUID)？
EN

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问有没有办法在Mac上生成标准的128位GUID (UUID)？EN

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问有没有办法在Mac上生成标准的128位GUID (UUID)？
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