blocks|key|196842|text|最近，我在使用Xcode4.6和iOS+6.1时遇到了类似的情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196843|我所做的就是在模拟器上切换到一个不同的设备版本(5.1)，然后它就运行了。切换回6.1版本，并自行修复。|196844|Xcode有时可能帮不上忙。|196845|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I had something similar happen to me recently using Xcode 4.6 and iOS 6.1. 

All I did was switch to a different device version (5.1) on the simulator and it ran. Switched back to 6.1 and it fixed itself. 

Xcode can be unhelpful at times.

blocks|key|194759|text|这会发生在我们身上，我们清除缓存，删除派生数据文件夹..等等，什么都没有发生。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194760|下面的步骤解决了这个问题，|194761|194762|将xib+(+Open+As+>+Source+Code+)作为源代码打开(右键单击Xcode中的xibOpen+As+>+Source+Code或使用TextEdit将其打开)|ordered-list-item|offset|length|style|CODE|194763|删除此xib|194764|并使用Xcode<+Code+>H212|194765|194766|有关使用此article的更多解释，它可以帮助我们解决此问题。|194767|entityMap|0|LINK|mutability|MUTABLE|url|http://www.tyreeapps.com/blog/tools/2014/06/10/Xcode-Crash-with-xib-Files.html^0|0|0|0|7|L|16|5|1G|L|24|8|0|0|0|0|5|7|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|13|8|@$H|14|I|15|J|K]|$H|16|I|17|J|K]|$H|18|I|19|J|K]|$H|1A|I|1B|J|K]]|9|@]|A|$]]|$1|L|3|M|5|G|7|1C|8|@]|9|@]|A|$]]|$1|N|3|O|5|G|7|1D|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1F|8|@]|9|@$H|1G|I|1H|1|1I]]|A|$]]|$1|S|3|-4|5|6|7|1J|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

This happen to us and we clean cache, delete Derived data folder.. etc. nothing happen. 

below steps made it fix, 

<ol>
<li>open xib(nib) as Source Code (Right click on the xib <code>Open As &gt; Source Code</code> from <code>Xcode</code> or open it using <code>TextEdit</code>) </li>
<li>remove this <code>appearanceType="aqua"</code> </li>
<li>save and open using Xcode</li>
</ol>

For more explain use this <a href="http://www.tyreeapps.com/blog/tools/2014/06/10/Xcode-Crash-with-xib-Files.html" rel="noreferrer">article</a>, it help us to fix the issue.

blocks|key|3032246|text|尝试清理应用程序。Cmd-Shft-K|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3032247|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Try cleaning the app. Cmd-Shft-K.

blocks|key|192567|text|尝试找到项目中的所有XIB文件并将其打开。其中之一很可能会使您的Xcode崩溃。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|192568|我的问题是一些XIB文件中的自定义字体。|192569|我不得不在我的电脑上安装丢失的字体，问题就解决了。|192570|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Try to find all XIB files in project and open it. One of them will most likely crash your Xcode. 

My problem was custom fonts in some XIB file. 

I had to install missing fonts on my computer and problem was solved.

blocks|key|194902|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194903|重新启动Xcode+-未工作并清理应用程序-未工作|ordered-list-item|194904|删除derivedData+-未工作|194905|重置模拟器内容和设置-未工作|194906|更改模拟器版本-未工作|194907|重新启动操作系统-神奇的Works|offset|length|style|BOLD|194908|194909|我不确定哪个部分起到了魔力，是的，它杀死了很多时间。|194910|entityMap^0|0|0|0|0|0|9|8|0|0|0^^$0|@$1|2|3|-4|4|5|6|U|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|V|7|@]|8|@]|9|$]]|$1|D|3|E|4|C|6|W|7|@]|8|@]|9|$]]|$1|F|3|G|4|C|6|X|7|@]|8|@]|9|$]]|$1|H|3|I|4|C|6|Y|7|@]|8|@]|9|$]]|$1|J|3|K|4|C|6|Z|7|@$L|10|M|11|N|O]]|8|@]|9|$]]|$1|P|3|-4|4|5|6|12|7|@]|8|@]|9|$]]|$1|Q|3|R|4|5|6|13|7|@]|8|@]|9|$]]|$1|S|3|-4|4|5|6|14|7|@]|8|@]|9|$]]]|T|$]]

<ol>
<li>Restart Xcode - Didn't Work</li>
<li>Cleaning the App - Didn't Work</li>
<li>Deleting the derivedData - Didn't Work</li>
<li>Reset simulator content and settings - Didn't Work</li>
<li>changing simulator versions - Didn't Work</li>
<li>Restart the OS - Magically Works</li>
</ol>

I'm not sure which part did the magic and yes it killed a lot of time.

blocks|key|2820569|text|在我的例子中，我是在Visual+Studio上工作。一切都很好。突然之间，我也遇到了同样的问题。然后我打开XCode，我看到了可用的更新。然后我更新了Xcode更新。然后它就起作用了:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2820570|所以原因是:+XCode期望完成一些更新。在此之前，它不能正常工作。|2820571|​|2820572|📷|atomic|offset|length|2820573|2820574|2820575|2820576|2820577|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/d7b3e5ee013a8959ed79b5540eccf0b3.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/e74fa118cfe1d0f8d3da9f3ea6fc779a.png^0|0|0|0|0|1|0|0|0|0|0|1|1|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|12|8|@]|9|@$I|13|J|14|1|15]]|A|$]]|$1|K|3|E|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|E|5|6|7|17|8|@]|9|@]|A|$]]|$1|M|3|G|5|H|7|18|8|@]|9|@$I|19|J|1A|1|1B]]|A|$]]|$1|N|3|E|5|6|7|1C|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V|W|-4]]|X|$5|R|S|T|A|$U|Y|W|-4]]]]

In my case, I was working on Visual Studio. It was all good. All of a sudden, I got the same issue. 
Then I opened XCode, I saw the updates available. Then I Updated the Xcode updates. Then it worked :) 

So the reason was : XCode expected to complete some updates. Until that, It was not working properly.

<a href="https://i.stack.imgur.com/ieSVA.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ieSVA.png" alt="enter image description here"></a>

<a href="https://i.stack.imgur.com/JFPxW.png" rel="noreferrer"><img src="https://i.stack.imgur.com/JFPxW.png" alt="enter image description here"></a>

blocks|key|194741|text|如果遇到问题，您应该做的是:+ibtool+--warnings+--errors+-notices+yourfile.xib+>+alerts.plist|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194742|它会崩溃，但现在你有了崩溃日志，在我的例子中，这是一个模拟指标的问题：|194743|194744|本地主机:Classes+me$+ibtool+--警告--错误--通知CodeViewController.xib+>+alerts.plist+2014-04-25+17:40:48.625+ibtoold11691:507+DVTAssertions:+ASSERTION+FAILURE+in+CodeViewController.xib+Details：(initialTargetRuntime)不应为空。Object:+Method：-initWithTargetRuntime:+Thread：{name+=+(null)，num+=+1}提示:无|blockquote|194745|194746|194747|因此，在我的示例中，我通过上下文菜单打开了xib+as+source，并删除了metrics对象。这取决于要删除或更改的错误。再试一次ibtool，如果它没有崩溃，那你就没问题了。|194748|背景:这个错误的原因是一般性的，它总是会在不同的iOS+xcode版本之间改变不同的规范时发生，主要是如果你没有定期检查你的项目的xcode更新。|194749|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|S|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|U|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|V|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|W|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|O|$]]

What you should do if you're stuck is, in a shell:
ibtool --warnings --errors --notices yourfile.xib > alerts.plist

which will crash, but now you have the crashlog, in my case it was an issue with simulated metrics:

<blockquote>
 localhost:Classes me$ ibtool --warnings --errors --notices CodeViewController.xib > alerts.plist
 2014-04-25 17:40:48.625 ibtoold[11691:507] [MT] DVTAssertions: ASSERTION FAILURE in /SourceCache/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-5038/InterfaceBuilder/WidgetIntegration/SimulatedMetrics/IBUISimulatedSizeMetrics.m:33
 Details: (initialTargetRuntime) should not be nil.
 Object: 
 Method: -initWithTargetRuntime:
 Thread: {name = (null), num = 1}
 Hints: None
</blockquote>

So in my case I opened the xib as source via context menu and removed the metrics objects. It depends on the error what to remove or change. Try ibtool again and if it doesn't crash you're good.

Background:
The reason for this error is generic, it can always happen with different specs changing from iOS xcode version to version, mostly if you haven't checked your projects periodically with xcode updates.

blocks|key|194456|text|这对于那些在过去经历过这个问题的人来说是无关紧要的……但是在WatchKit框架中，我遇到了这个错误。我所做的只是删除了两个WKInterface控制器之间链接的段，构建成功了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194457|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

This will be irrelevant for those who had experienced the problem in the past... But with the WatchKit Framework, I had this error come up. All I did was delete a segue which I had linked between two WKInterface Controllers, and the build succeeded.

blocks|key|192825|text|我遇到了这个错误，在扫描崩溃日志后，我注意到我的Xcode-7构建试图使用Xcode-8Beta中的构建工具。我之前使用了xcode--选择来更改我想要使用的构建工具的版本。如果您安装了xcode-beta，请使用以下命令检查您的设置：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|192826|显示设置了哪个生成工具路径：|192827|xcode-select+-p|code-block|syntax|javascript|192828|选择标准Xcode路径：|192829|sudo+xcode-select+-s+/Applications/Xcode.app/|192830|如果您尝试在不同的安装路径下使用Xcode进行构建，请确保上面的路径反映了这一点。|192831|entityMap^0|1P|9|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|X|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|Y|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|Z|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|10|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|11|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|T|$]]

I go this error, and after scanning the crash log I noticed out my Xcode-7 build was trying to use the build tools from Xcode-8 Beta. I had previously used xcode-select to change the version of the build tools I wanted to use. If you have a xcode-beta install, check your settings using the commands below:

Show which build tool path is set:

<pre><code>xcode-select -p
</code></pre>

Select the standard Xcode path:

<pre><code>sudo xcode-select -s /Applications/Xcode.app/
</code></pre>

If you're trying to build with an Xcode at different installation path, be sure the path above reflects that.

blocks|key|2820295|text|这是刚刚在XCode+8.3中获得的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2820296|对我来说，我只是退出了XCode，然后清理了应用程序并重新构建。在那之后一切都很好。|2820297|我的原因是为本地化的故事板添加了新的字符串文件。|2820298|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Got this just now with XCode 8.3.

For me, I just quit XCode, then cleaned the app and rebuilt. It was fine after that.

The cause for me was adding new string files for a localized storyboard.

blocks|key|2819820|text|我刚刚经历了同样的事情，这里的其他答案都不能为我解决这个问题。由于git合并，它在故事板中变成了重复的UILabel。显然，如果两个UI元素具有相同的内部ID，Xcode将崩溃。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2819821|我找到问题原因的方法是：|2819822|2819823|迭代地在git历史中后退一步，检查每个提交，直到找到第一个不会导致Xcode崩溃的故事板。|unordered-list-item|2819824|一旦你的提交开始崩溃，检查HEAD并迭代地恢复问题提交中的故事板更改。继续缩小范围，直到有一个UI元素或一行将导致崩溃。|2819825|永久恢复负责的更改并重新启动Xcode。再次打开故事板，您可能会收到内部不一致的警告。同意Xcode所做的建议更改，但请查看这些更改。|2819826|如有必要，您现在可以尝试从头开始重新创建UI元素或以前导致问题的更改。|2819827|2819828|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|S|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|T|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|U|8|@]|9|@]|A|$]]|$1|J|3|K|5|G|7|V|8|@]|9|@]|A|$]]|$1|L|3|M|5|G|7|W|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

I just experienced the same thing and none of the other answers here could resolve the issue for me. It turned out to be a duplicate UILabel in the storyboard due to a git merge. Apparently Xcode will crash if two UI elements have the same internal ID.

My method for finding the responsible issue was:

<ul>
<li>Iteratively step backward through the git history, checking out each commit until you find the first storyboard that doesn't crash Xcode.</li>
<li>Once you have the commit that started crashing, check out HEAD and iteratively revert the storyboard changes in the problem commit. Continue to narrow it down until you have the one UI element or one line that will cause a crash.</li>
<li>Revert the responsible change permanently and restart Xcode. Open the storyboard again and you may be warned about an internal inconsistency. Agree to the proposed changes Xcode makes, but review them.</li>
<li>If necessary, you may now attempt to re-create the UI element or changes from scratch that were causing the problem before.</li>
</ul>

blocks|key|2820114|text|当我遇到'255‘问题时，我正在一个二级git分支中工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2820115|我只是切换回我的主要git分支，清理了项目并运行。没有问题，正如我所期望的那样。|2820116|然后我切换回“有问题的”git分支，并成功地重新构建了它。|2820117|小精灵。|2820118|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I was working within a secondary git branch when I encountered the '255' problem. I merely switched back to my main git branch, cleaned the project and run. No problems as I had expected. 
Then I switched back to the 'problem' git branch and rebuild it with success.

Gremlins.

blocks|key|197083|text|我在使用Xcode8.2.1和iOS+10.2时也遇到过类似的情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|197084|我在模拟器上切换到一个更早的设备版本，它工作了。然后我换了回来，它被修好了。|197085|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I had something similar happen to me too using Xcode 8.2.1 and iOS 10.2.

I switched to an earlier device version on the simulator and it worked. Then I switched back and it was fixed.

blocks|key|197136|text|我认为，如果你长时间使用Xcode而没有关闭它，Xcode最终会变得毫无帮助，并给你带来随机的神秘错误。因此，每次出现可疑错误时，我都会定期重启Xcode和我在mac上运行的所有应用程序。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|197137|197138|+Xcode缓存|blockquote|197139|197140|+class+尝试检查所有segue/outlet/storyboard控制器类。有时，情节提要会与已设置的视图控制器类断开连接。(这可能会导致运行时错误)。|197141|+delete+尝试清理您的项目和转到(~/库/开发人员/Xcode/派生数据)并删除您的项目缓存。然后强制关闭Xcode，然后重新启动它。|197142|+try+尝试检查所有的segue/outlet/storyboard控制器类。有时，情节提要会与已设置的视图控制器类断开连接。(这可能会导致运行时错误)。|197143|第4次尝试检查(复制捆绑包资源，编译源-项目>构建阶段)确保列出的文件具有正确的地址和文件夹。有时，创建组会导致创建文件夹，并导致编译器找不到文件|197144|5这也可能是因为移动了文件%2B+Xcode最终变得无用，并给你随机的神秘错误。并在文件更改目录后更新(复制包资源，编译源-项目>构建阶段|197145|个人错误。意外删除|197146|这也可能是由于调用已删除的ViewController或outlet造成的|197147|entityMap^0|0|2M|0|0|1|7|0|0|0|7|0|0|8|0|0|5|0|0|3|0|0|1|0|0|9|0|0|Y|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|13|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|17|8|@]|D|@]|E|$]]|$1|K|3|L|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|1B|8|@$9|1C|A|1D|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|1E|8|@$9|1F|A|1G|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1H|8|@$9|1I|A|1J|B|C]]|D|@]|E|$]]|$1|S|3|T|5|6|7|1K|8|@$9|1L|A|1M|B|C]]|D|@]|E|$]]|$1|U|3|V|5|6|7|1N|8|@$9|1O|A|1P|B|C]]|D|@]|E|$]]|$1|W|3|X|5|6|7|1Q|8|@$9|1R|A|1S|B|C]]|D|@]|E|$]]|$1|Y|3|-4|5|6|7|1T|8|@]|D|@]|E|$]]]|Z|$]]

I figure out that if you use Xcode for too long without closing it, Xcode will become ultimately unhelpful and giving you random mystery error. so i regularly restart Xcode and all the apps that I`m running on my mac every time a suspicious error appear.
<blockquote>
Xcode Cache 
1st try check all your segue/outlet/storyboard controller class. sometime storyboard would disconnected with the view controller class that has been set. (this might cause run time error).
2nd try cleaning up you project and goto
(~/Library/Developer/Xcode/DerivedData) and delete your project cache.
then Force Close Xcode then restart it.
3rd try check all your segue/outlet/storyboard controller class. sometime storyboard would disconnected with the view controller class that has been set. (this might cause run time error).
4th try check (copy bundle resource, compile source - Project &gt; Build phase) make sure the file listed is exist with the correct address and folder. sometime creating a group would cause a folder to be create and causing the file cant be found by the compiler
5th this also might been cause by moved file + Xcode become ultimately unhelpful and giving you random mystery error. and dint update the (copy bundle resource, compile source - Project &gt; Build phase) after the file has change directory
Personal Mistake. unintended deleting 
this also might have been cause by calling an deleted ViewController or outlet
</blockquote>

blocks|key|3033182|text|在操作系统更新(macOS+High+Sierra+10.13.4)之后，我使用Visual+Studio+for+Mac+(社区，7.4.2+(内部版本12))也遇到了同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3033183|在这种情况下，您似乎只需要更新Visual+Studio和Xcode。|3033184|请注意，当然，Visual+Studio不会带来Xcode更新，因此“诀窍”是打开后者并让它运行更新。|3033185|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I have had the same issue using Visual Studio for Mac (Community, 7.4.2 (build 12)) after an OS update (macOS High Sierra 10.13.4).

In this case, it seems that you just need to update Visual Studio and Xcode. 

Notice that, of course, Visual Studio doesn't bring Xcode updates, so the "trick" was to open the latter one and let it run the updates.

blocks|key|194562|text|我在Xcode8中也遇到了同样的问题，删除派生数据修复了我的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194563|194564|转到文件夹~/库/Developer/+Xcode+/DerivedData/，然后清除该|ordered-list-item|194565|中的文件夹，重新启动Xcode和模拟器并运行您的项目....！|194566|194567|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|L|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|M|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|N|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|J|$]]

I was also facing the same issue in Xcode 8. Deleting the Derived data fixed my issue.

<ol>
<li>Go to Folder ~/Library/Developer/Xcode/DerivedData/ and clear the folders within that</li>
<li>Restart Xcode and Simulator and Run Your project....!</li>
</ol>

blocks|key|2819680|text|只是在故事板中做了一些工作后发生了这种情况。我做了一些撤销操作，结果只是一个添加到视图中的简单UIButton。删除了它，它的构建没有错误。只需添加一个新按钮，它就能正常工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2819681|想要更多解释...按钮被从一个TVCell原型复制到另一个原型。我猜在副本中出现了一些混淆。很高兴在尝试构建之前我没有做太多改变。|2819682|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Just had this happen after doing some work in the storyboard. I did some undoing and it turned out to be a simple UIButton added to a view. Deleted that and it built without error. Just added a new button and it worked. 

For a little more explanation... The button had been copied from one TVCell prototype to another. some confusion happened in the copy I guess. Just glad I hadn't change much before trying to build.

blocks|key|2819840|text|在我的例子中，这是在重命名一些名称空间之后发生的，我解决了同样的问题，转到项目属性>应用程序选项卡>默认名称空间:给出新的正确名称空间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2819841|当然，我还在类中更改了名称空间，但这将有所帮助，因为这将修复所有自动生成的文件。建议使用“清理并生成”，最终关闭并重新打开解决方案。|2819842|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

In my case it happened after renaming some namespaces and I solved the same issue going to the projects properties > APPLICATION tab > Default namespace : 
giving the new correct namespace.

Of Course I changed the namespace also inside the classes, but this will help because will fix all auto-generated files.
Clean and build is recommended and eventually close and reopen the solution.

blocks|key|196958|text|当我将代码表单git与其他开发人员代码合并时，我也遇到了同样的问题。我试了很多次来清理我的项目。但什么也帮不了我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196959|我在源代码中打开了故事板。开始与上一次工作的存储库故事板进行比较。然后我发现一个相同的标签在同一个屏幕上出现了两次。然后我删除一个then并保存。这对我有帮助。|196960|您可以查看您的xib或故事板。|196961|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I faced same issue when i merge code form git with other developer code. i tried many time to clean my project. But nothing help me out.

I open storyboard in source code. Start comparing with last working repositories storyboard. Then i found a same label appear two time in same screen. then i remove one of then and save. It helps me. 

you can check your xib or storyboard.

blocks|key|194808|text|我有这个bug是因为我在编辑故事板作为源代码时重写了一个<view>到<imageView>。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|194809|我认为这个快速解决方案可以用UIImageView替换一些自定义类(UIView的子类)。|194810|194811|所有人都称赞GIT。|194812|entityMap^0|S|6|Z|B|0|E|B|Y|6|0|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|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|W|8|@]|D|@]|E|$]]|$1|I|3|J|5|6|7|X|8|@]|D|@]|E|$]]|$1|K|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|L|$]]

I had this bug because I rewrote a <code>&lt;view&gt;</code> to <code>&lt;imageView&gt;</code> while editing the storyboard as source code.

I thought this quick-and-dirty solution would work for replacing some custom classes (subclass of <code>UIView</code>) with <code>UIImageView</code>s.

<hr>

All praise GIT.

blocks|key|3032619|text|这就是给我带来问题的原因:我曾试图在Xcode5.0.2中使用Xcode8.0模拟器。我将libtool+8.0模拟器粘贴到以下路径-+/Applications/+Xcode+\+2.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs中，结果是我可以在Xcode5.0.2的下拉列表中看到iOS+8.1模拟器，但这导致了iOS的编译错误。我从路径中删除了模拟器，它在我重新启动Xcode后工作。现在为了使用Xcode8.0模拟器，我使用的是iOS+6.1|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3032620|entityMap^0|1W|2P|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|$]]

This is what caused the problem for me:
I had attempted to use the iOS 8.0 simulator with Xcode 5.0.2.
I had pasted iOS 8.0 simulator in the following path - /Applications/Xcode\ 2.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs
The result of this was that I was able to see iOS 8.1 simulator visible in the dropdown list in Xcode 5.0.2 but this resulted in compilation error of libtool. I removed the simulator from the path and it worked after i restarted Xcode. Now in order to use iOS 8.0 simulator I am using Xcode 6.1

blocks|key|2820010|text|我用这个命令修复了这个错误，关闭模拟器和Xcode：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2820011|codesign+-vv+/A*/Xc*+%7C+open+-ef|code-block|syntax|javascript|2820012|希望这能有所帮助。|2820013|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I fixed the error with this command, close the simulator and Xcode:

<pre><code>codesign -vv /A*/Xc* | open -ef
</code></pre>

Hope that helps.

blocks|key|194506|text|当我为10.9构建一个在XCode+6.4+(10.10)中创建的.XIB时，我得到了这个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194507|参见this+answer。XIB要求的是10.10中引入的“labelColor”，而10.9对它一无所知。|offset|length|194508|将XIB作为源代码打开，避免了XCode崩溃，并允许我将'labelColor‘实例更改为'textColor’，这样错误就解决了。|194509|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/27507727/invalid-color-system-labelcolor-warning-given-only-once^0|0|2|B|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

I was getting this error when building for 10.9 an .XIB that was created in XCode 6.4 (10.10). 

See <a href="https://stackoverflow.com/questions/27507727/invalid-color-system-labelcolor-warning-given-only-once">this answer</a>. The XIB was calling for 'labelColor' which was introduced in 10.10, and was unknown to 10.9. 

Opening the XIB as source kept it from crashing XCode, and permitted me to change instances of 'labelColor' to 'textColor' and the error was resolved.

blocks|key|194514|text|正如Logan+Geef上面提到的，它似乎是由接口控制器序列(即循环)引起的。删除“坏的”segues并不能真正解决导航问题。所需要的是有策略地放置一些按钮动作来弹出控制器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194515|下面是为我工作的代码：|194516|+-+(IBAction)backToStart+{

+++[self+popToRootController];
+}

+-+(IBAction)backToPrevious+{

+++[self+popController];
+}|code-block|syntax|javascript|194517|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

As Logan Geefs mentions above, it appears to be caused by Interface Controller segues (i.e. loops). Deleting the "bad" segues doesn't really solve the navigation problem. What is needed is to place some button actions to [pop controllers] strategically.

Here's the code that worked for me:

<pre><code> - (IBAction)backToStart {

 [self popToRootController];
 }

 - (IBAction)backToPrevious {

 [self popController];
 }
</code></pre>

blocks|key|197122|text|很少有人提到这个问题与segues有关，我的也是，尽管它并没有在我添加新segue后立即弹出，而且我能够运行应用程序几次，在它发生之前进行一些更改，添加新的视图，所以不要忽视这一点。我删除了一些控制器并撤销，以防无济于事。如果一个段是一个问题，你可以构建，但你不能添加这个段，所以重新创建整个视图控制器，如果这是一个可行的选择。复制和粘贴似乎不起作用，尽管我没有尝试删除IBOutlet连接。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|197123|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Few have mentioned that the problem was related to segues, mine was too, although it did not pop up immediately after i added the new segue and i was able to run the app a few times make some changes, add new views before it occurred, so don't disregard this. I went deleting some of the controllers and undoing in case it didn't help. If a segue is the issue you may build but you wont be able to add that segue, so re-create the entire view controller if it's a viable option. Copying and pasting didn't seem to work, though i did not try removing the IBOutlet connections.

blocks|key|197149|text|当我安装并开始使用XCode+9Beta时，这种情况开始发生在我身上。当我在8.3中开始修改好的项目时，故事板被这个错误损坏了，XCode崩溃了。我的电脑上安装了XCode+7.x、8.3和9。我将它们全部卸载(并删除了所有相关文件)，然后从App+Store重新安装了8.3。我的项目故事板仍然被损坏，但我能够从备份中恢复，现在随着我的继续，一切都很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|197150|不确定这是否与9+beta相关。|197151|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

This started to happen to me when I installed and started using XCode 9 betas. When I started modifying good projects in 8.3, the storyboards got corrupted with this error and XCode crashed.
I had XCode 7.x, 8.3 and 9 installed on my computer. I uninstalled all of them (and removed all related files) and then reinstalled 8.3 from the App Store. My project storyboards were still corrupted, but I was able to recover from backup and now things are just fine as I proceed. 
Not sure if this is 9 beta related or not.

blocks|key|192996|text|在我的例子中，我在手动解决了"project.pbxproj“文件中的合并冲突后遇到了这个问题。在project->target->BuildPhases->CopyBundleResources.中，选择XCode我删除了一些以空白图标显示的重复文件(与XIB文件图标不同)。AFter这个，构建进行得很顺利，没有任何问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|192997|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case, I had this issue after I manually resolved a merge conflict in the "project.pbxproj" file.
In XCode, select project->target->BuildPhases->CopyBundleResources. There I removed some duplicate files that were showing up in blank icons (unlike the XIB file icons). AFter this, the build went well without issues.

blocks|key|2820435|text|我今天在一个新项目中遇到了这个错误，通过“增强现实应用”项目模板测试iOS的ARKit。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2820436|将一些.scn文件从根项目移动到art.scnassets文件夹后，我开始收到代码签名错误，但我所做的任何事情都无法解决它。|2820437|我尝试了这个帖子中的所有建议(清理，清理派生数据，重启Xcode，重启Mac，在故事板文件中查找重复的ID)……但让它对我起作用的是：|2820438|将我对git+project|2820439|hard-reset所做的更改提交并推送到以前的commit|unordered-list-item|2820440|
|2820441|clean派生数据，然后运行project|2820442|2820443|hard-reset返回到最近的commit|2820444|2820445|...and现在它起作用了.所以我猜这是XCode的git处理中的一些错误？|2820446|entityMap^0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|11|8|@]|9|@]|A|$]]|$1|M|3|N|5|J|7|12|8|@]|9|@]|A|$]]|$1|O|3|L|5|6|7|13|8|@]|9|@]|A|$]]|$1|P|3|Q|5|J|7|14|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|V|$]]

I got this error today on a new project, testing iOS' ARKit via the "Augmented Reality App" project template.

After moving some .scn files from the root project into the art.scnassets folder, I started getting the code-sign error, and nothing I did was able to resolve it.

I tried all the suggestions in this thread (clean, clean derived data, restart Xcode, restart the Mac, look in the storyboard files for duplicate IDs)... but what made it work for me, was to:

<ul>
<li>commit and push my changes to my git project</li>
<li>hard-reset to the previous commit</li>
<li>clean derived data, and run successfully</li>
<li>hard-reset back to the most recent commit</li>
</ul>

...and now it worked... so I'm guessing it was some error in XCode's git-handling???

blocks|key|2820458|text|在Xcode9上，一个原因是Xcode9.1中旧的.XIB文件的错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2820459|修复：|2820460|2820461|Upgrade+to+XCODE+9.2|ordered-list-item|2820462|所有.XIB文件都应设置为iOS+8.1或更高版本。|2820463|2820464|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|P|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|Q|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|L|$]]

On XCODE 9 one cause of this is a bug in XCODE 9.1 with old .XIB files.

Fix:

<ol>
<li>Upgrade to XCODE 9.2</li>
<li>All your .XIB files should be set to iOS 8.1 version or higher.</li>
</ol>

blocks|key|2820700|text|只需对项目进行clean+build即可。你会解决的！|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2820701|entityMap^0|7|B|P|2|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Just clean build your project. you'll get Solved!

blocks|key|2820706|text|如果这对您没有任何帮助，并且您正在使用pod，并且可能在不同的Xcode版本中打开相同的项目，那么您必须|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2820707|2820708|转到项目的根文件夹。从Podfile.|ordered-list-item|2820709|Delete+4文件和文件夹-+Podfile、Podfile.lock、Pod(文件夹)、Pod终端复制数据并保存到某个位置，然后导航到根文件夹。|2820710|run命令pod+install|offset|length|style|CODE|2820711|open+Podfile并粘贴以前Podfile中保存的数据|2820712|run命令|2820713|run命令您的工作区，您的问题将消失。|2820714|2820715|entityMap^0|0|0|0|0|5|B|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|X|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|Y|8|@]|9|@]|A|$]]|$1|F|3|G|5|E|7|Z|8|@]|9|@]|A|$]]|$1|H|3|I|5|E|7|10|8|@$J|11|K|12|L|M]]|9|@]|A|$]]|$1|N|3|O|5|E|7|13|8|@]|9|@]|A|$]]|$1|P|3|Q|5|E|7|14|8|@]|9|@]|A|$]]|$1|R|3|S|5|E|7|15|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|V|$]]

If nothing helped you from this answers and you are using pods and maybe you open same project in different Xcode versions you have to

<ol>
<li>Go to root folder of your project. </li>
<li>Copy and save somewhere data from Podfile.</li>
<li>Delete 4 files and folders - Podfile, Podfile.lock, Pods(folder), your_workspase_name.xcodeproject</li>
<li>Open terminal and navigate to root folder. </li>
<li>run command <code>pod init</code></li>
<li>open Podfile and paste saved data from previous Podfile</li>
<li>run command <code>pod install</code></li>
<li>open your workspase and your problems will be gone. </li>
</ol>

blocks|key|3033252|text|我使用的是xCode+9.4，我遇到了这个错误。我尝试重新启动xCode，清理应用程序，并删除派生数据，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3033253|3033254|我重启了我的mac|blockquote|3033255|3033256|3033257|它的工作就像一个护身符。|3033258|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|M|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|N|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|P|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Q|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|K|$]]

I use xCode 9.4 and I had this error.
I tried restart xCode, cleaning the app, and deleting the derived data, 

<blockquote>
 I restarted my mac
</blockquote>

and its work like a charm.

blocks|key|3033260|text|如果在最新的Xcode10中发生这种情况，请尝试清除派生数据。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3033261|3033262|+~/Library/Developer/Xcode/DerivedData|blockquote|3033263|3033264|entityMap^0|6|7|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|P|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|Q|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|R|8|@]|D|@]|E|$]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

If it happens in latest Xcode 10 then try cleaning derived data. 

<blockquote>
 ~/Library/Developer/Xcode/DerivedData
</blockquote>

All of a sudden I can't build my project. I get the following compiler error:

<blockquote>
 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/ibtool failed with exit code 255
</blockquote>

I get this error for a whole bunch of my xib files. Any ideas what is happening, and what a solution is?

Using Xcode 4.6, iOS 6.1.

Why am I getting ibtool failed with exit code 255?

突然之间我就不能构建我的项目了。我得到以下编译器错误： /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/ibtool失败，退出代码为255对于我的一大堆xib文件，我得到了这个错误。你知道发生了什么吗?解决方案是什么？使用Xcode4.6，iOS 6.1。

问为什么我得到的ibtool失败，退出代码255？
EN

回答 33

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问为什么我得到的ibtool失败，退出代码255？EN

回答 33

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问为什么我得到的ibtool失败，退出代码255？
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