blocks|key|256979|text|[[UIDevice+currentDevice]+uniqueIdentifier]仍然会给出和以前一样的结果。链接到的项目不是1:1替代，而是使用不同的实现为您提供类似的解决方案，因此两个字符串是不同的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|256980|entityMap^0|0|17|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|$]]

<code>[[UIDevice currentDevice] uniqueIdentifier]</code> will still give you the same result as before. The project that you link to is not a 1:1 replacement, it is an alternative that gives you a similar solution using a different implementation, thus the two string are different.

blocks|key|2080561|text|MAC地址是连接到网络接口上的(据称)全局唯一标识符，尽管它们可以通过多种方式进行更改。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2080562|苹果用来提供访问权限的uniqueidentifier是附在设备硬件上的，而不是可变的，这使得它能够很好地跨应用程序和会话跟踪用户。这也是苹果公司删除它的原因，如果我不得不猜测的话。没有办法在应用程序和会话中跟踪用户，会增加用户在设备上的隐私。|style|CODE|2080563|如果苹果出于同样的原因最终取消了对MAC地址的访问，我也不会感到惊讶，所以它可能会让你受益于检查跟踪设备的其他选项。|2080564|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/MAC_address|1|https://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now^0|0|5|0|0|B|G|0|1A|B|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|6|7|X|8|@$A|Y|B|Z|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|J|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|K|$L|$5|M|N|O|C|$P|Q]]|R|$5|M|N|O|C|$P|S]]]]

A <a href="http://en.wikipedia.org/wiki/MAC_address" rel="nofollow noreferrer">MAC Address</a> is a (supposedly) globally unique identifier attached to a network interface, though they can be changed in many ways.

The <code>uniqueidentifier</code> that Apple used to provide access to was attached to the device hardware and not changeable, which made it excellent for tracking a user across apps and sessions. That's also the reason Apple is removing it, if I had to guess. Not having a way to track users across apps and sessions increases a user's privacy on their devices.

I wouldn't be surprised if Apple removes access to the MAC Address eventually for the same reasons, so it might benefit you to <a href="https://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now">examine other options for tracking devices</a>.

blocks|key|257020|text|代码更改了！|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|257021|UniqueIdentifier不再是独一无二的！|257022|第一种格式有36个十六进制长。|257023|93F38DEB-3C0B-5C09-B+746-0+DFDFDDB297C|257024|第二个有40个正方形！|257025|因为这一切都变了。我不知道它是否在标识符中附加了更多的十六进制，但是更大的大小改变了所有。|257026|entityMap^0|0|6|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|V|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|W|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|X|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|Y|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|Q|$]]

The code CHANGED!!!!!

UniqueIdentifier is no more UNIQUE!!!

The first format have 36 hexa lenght

93F38DEB-3C0B-5C09-B746-0DFDFDDB297C

The second have 40 hexa!!!!!

Because this, it changed. I don't know if it append more hexa to identifier, but the bigger size changed al all.

blocks|key|116733|text|您不应该在iOS+5上使用唯一标识符，这是您需要知道的全部信息。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|116734|iOS上的唯一标识符总是冗余的，是一个很大的安全威胁。其他操作系统没有唯一的标识符，没有它们就可以生存。|116735|您可以始终在服务器上生成唯一标识符并将它们发送到您的设备。|ordered-list-item|116736|您总是可以使用系统功能从一些独特的系统属性(例如MAC)中生成它们。在iOS上，您可以使用CFUUIDCreate创建唯一标识符。该标识符在设备和时间上都是唯一的(每次调用它时都会得到不同的标识符)，但是可以保存它们(例如，进入密钥链)。|offset|length|style|CODE|116737|entityMap^0|0|0|0|19|C|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|R|8|@$I|S|J|T|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|N|$]]

You shouldn't use unique identifier on iOS 5. That's all you need to know.

The unique identifier on iOS was always something redundant and a big security threat. Other operating systems don't have unique identifiers and they can live without them.

<ol>
<li>You can always generate unique identifiers on your server and send them to your device.</li>
<li>You can always generate them from some unique system property (e.g. MAC), using system functions. On iOS you can create a unique identifier using <code>CFUUIDCreate</code>. This identifier is unique across devices and across time (you'll get a different identifier every time you call it) but you can save them (e.g. into keychain).</li>
</ol>

The function

<pre><code>[[UIDevice currentDevice] uniqueIdentifier]
</code></pre>

Is deprecated in iOS 5 and I found the solution in this project using the MAC address: <a href="https://github.com/gekitz/UIDevice-with-UniqueIdentifier-for-iOS-5" rel="nofollow">https://github.com/gekitz/UIDevice-with-UniqueIdentifier-for-iOS-5</a>

Ok, it is solved. But now I discovery that iOS 5 CHANGED the format of code that <code>uniqueIdentifier</code> return.

In iOS 4.x it is in this format: 

93F38DEB-3C0B-5C09-B746-0DFDFDDB297C 

Now the iOS 5, the same function return in this format:

93f38deB3c0b5c09b7460dfdfddb297c

Anyone know if the code changed at all? It is different only is format or the code in really different for the same device?

The iOS 5 changed the uniqueIdentifier code?

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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功能[[UIDevice currentDevice] uniqueIdentifier]在iOS 5中被废弃，并且我在这个项目中找到了使用MAC地址：的解决方案。好了，解决了。但是现在我发现iOS 5改变了-- uniqueIdentifier返回的代码格式。在iOS 4.x中，它是这样的格式：93F38DEB-3C...

问iOS 5更改了uniqueIdentifier代码？
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问iOS 5更改了uniqueIdentifier代码？EN