blocks|key|196523|text|这通常是一个缓存问题。通常，可以通过按住Option键并选择“产品”>“Clean+Build+Folder...”来解决此问题|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|196524|entityMap^0|V|X|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 often a caching problem. Usually it can be resolved by holding down the Option key and choosing Product > Clean Build Folder...

blocks|key|3032038|text|删除项目的DerivedData文件夹。查看Xcode+preferences下的->+Locations以查看您保存它的位置。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3032039|entityMap^0|5|B|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|$]]

Delete the <code>DerivedData</code> folder for the project. Look under Xcode preferences -> Locations to see where you save it.

blocks|key|3031789|text|似乎产品>干净构建文件夹...(按下Option键)适用于大多数人。查看@gaige选择的答案。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3031790|如果你不像大多数人(包括我自己)，这仍然给你带来麻烦，XCode很可能会把你共享的预编译头文件放在其他地方。对我来说，它们位于一个类似于以下内容的文件夹中：|3031791|/var/folders/<some+random+two+characters>/<some+random+string>/C/com.apple.Xcode.502/SharedPrecompiledHeaders|code-block|syntax|javascript|3031792|我刚刚删除了整个SharedPrecompiledHeaders文件夹，这为我解决了问题。不过，我不会在这里碰太多其他东西。|3031793|entityMap^0|2|D|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|V|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

It seems that the Product > Clean Build Folder... (with Option key pressed) works for most people. See the selected answer by @gaige.

If you're unlike most people (myself included) and this still causes you trouble XCode has likely left your shared precompiled headers elsewhere. For me they were in a folder similar to this:

<pre><code>/var/folders/&lt;some random two characters&gt;/&lt;some random string&gt;/C/com.apple.Xcode.502/SharedPrecompiledHeaders
</code></pre>

I just deleted the entire SharedPrecompiledHeaders folder and that solved things for me. I wouldn't go touching much else in here though...

blocks|key|192443|text|转到Xcode偏好设置->位置(正如wcochran在答案中提到的)，并简单地重命名您的DerivedData文件夹。我只是简单地将我的位置从"DerivedData“改为"DerivedData2”，这迫使系统停止引用旧位置。当其他答案都不起作用时，这为我解决了这个问题。见图：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|192444|​|192445|📷|atomic|offset|length|192446|192447|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/300eccee8a5f962166b622d8c7243926.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

Go to Xcode Preferences->Locations (as mentioned in the answer by wcochran) and simply rename your DerivedData folder. I simply changed mine from "DerivedData" to "DerivedData2" and that forced the system to stop referencing the old location. This fixed it for me when none of the other answers worked. See pic:

<a href="https://i.stack.imgur.com/SD3bs.png"><img src="https://i.stack.imgur.com/SD3bs.png" alt="enter image description here"></a>

blocks|key|2819418|text|其他选项对我都不起作用，下面是修复它的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2819419|我删除了/Users/(Yourname)/Library/Developer/Xcode/DerivedData/ModuleCache/上的缓存文件夹(重命名也可以)。|offset|length|style|CODE|2819420|尝试删除错误中提到的文件夹，如果您的错误如下所示：|2819421|PCH+was+compiled+with+module+cache+path+'/Users/User/Library/Developer/Xcode/DerivedData/ModuleCache/75YIWZVTEAO8',+but+the+path+is+currently+'/Users/Stan/Library/Developer/Xcode/DerivedData/ModuleCache/75YIWZVTEAO8|2819422|entityMap^0|0|4|1U|0|0|0|5Z|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|L|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|M|$]]

None of the other options worked for me, here is what fixed it:

I deleted the cache folder at <code>/Users/(Yourname)/Library/Developer/Xcode/DerivedData/ModuleCache/</code>(renaming it works too). 

Try deleting the folder mentioned in the error, if your error looks something like this:

<code>PCH was compiled with module cache path '/Users/User/Library/Developer/Xcode/DerivedData/ModuleCache/75YIWZVTEAO8', but the path is currently '/Users/Stan/Library/Developer/Xcode/DerivedData/ModuleCache/75YIWZVTEAO8</code>

blocks|key|3032318|text|在ios项目目录中，转到build并删除ModuleCache文件夹。再次运行react-native+run-ios，它应该可以正常工作。摘要-+rm+-rf+ios/build/ModuleCache|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3032319|entityMap^0|13|K|22|S|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|$]]

In your ios project directory, go to build and delete ModuleCache folder. Run <code>react-native run-ios</code> again, it should work as expected.
Summary - <code>rm -rf ios/build/ModuleCache</code>

blocks|key|192406|text|从Finder中的项目位置删除Build和DerivedData文件夹对我来说很管用。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|192407|entityMap^0|F|5|L|B|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|$]]

Deleting the <code>Build</code> and <code>DerivedData</code> folders from the project location in Finder worked for me.

blocks|key|194315|text|我在尝试使用Swift+Package+Manager构建项目时遇到此错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194316|解决方案就是删除.build目录。|offset|length|style|CODE|194317|entityMap^0|0|8|6|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I met this error when trying to build a project with Swift Package Manager.

The solution is just delete the <code>.build</code> directory.

blocks|key|2819294|text|在升级Xcode之后，我在多个项目中得到了这一点。“清理构建文件夹”和“清理”没有效果--+@sedes回答和@josema.vitaminew的评论为我做了这件事。但它可能很棘手，除非你使用一些巧妙的方法，所以这里有一个逐步的快捷方式：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2819295|查找失败的构建日志使用cmd-f+"SharedPrecompiledHeaders“来找到它(它将位于一个巨大的可怕的复杂查找器文本"SharedPrecompiledHeaders”和它之前的所有字符的中间，但不是在它之后，直到你到达该路径的开始位(仍然在大文本块的中间)例如："/var/folders/03/n71d4r551jv40j5nb8r9fjy80000gn/C/com.apple.Xcode.501/SharedPrecompiledHeaders|2819296|open+|unordered-list-item|2819297|
|2819298|SharedPrecompiledHeaders|2819299|2819300|+commandline)|2819301|2819302|drag-select：Go+to+folder...|2819303|2819304|copy/paste+->+selected+path|2819305|2819306|in+"SharedPrecompiledHeaders“删除所有子文件夹(这很安全:这只是缓存数据)|2819307|2819308|...and现在你的所有项目都将被“修复”，但将不得不在第一次重新构建时使用零缓存(因此下一次构建只会比正常情况下慢一些)。|2819309|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|15|8|@]|9|@]|A|$]]|$1|K|3|H|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|M|5|F|7|17|8|@]|9|@]|A|$]]|$1|N|3|H|5|6|7|18|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|19|8|@]|9|@]|A|$]]|$1|Q|3|H|5|6|7|1A|8|@]|9|@]|A|$]]|$1|R|3|S|5|F|7|1B|8|@]|9|@]|A|$]]|$1|T|3|H|5|6|7|1C|8|@]|9|@]|A|$]]|$1|U|3|V|5|F|7|1D|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1F|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|10|$]]

After upgrading Xcode I was getting this with multiple projects. Clean Build Folder and Clean had no effect - @sedes answer and @josema.vitaminew 's comment did it for me. But it can be tricky unless you use a bit of cunning, so here's a step by step shortcut:

<ol>
<li>go to the build log that failed</li>
<li>use cmd-f "SharedPrecompiledHeaders" to find it (it will be in the middle of a massive horrible complex commandline)</li>
<li>drag-select the text "SharedPrecompiledHeaders" and all the characters BEFORE but NOT AFTER it until you get to the start of that path bit (still in the middle of the big block of text) e.g. for me: "/var/folders/03/n71d4r551jv40j5nb8r9fjy80000gn/C/com.apple.Xcode.501/SharedPrecompiledHeaders</li>
<li>open Finder</li>
<li>menu: Go -> Go to folder...</li>
<li>copy/paste the selected path</li>
<li>in "SharedPrecompiledHeaders" delete ALL sub-folders (this is safe: it is only cached data)</li>
</ol>

...and now all your projects will be "Fixed", but will have to re-build themselves first time with zero caching (so the NEXT build ONLY will be slower than normal).

blocks|key|3031916|text|特别是如果您从命令行构建，或者您有一个构建脚本，那么清除xcode目标是不够的。您已删除此文件夹。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3031917|预编译头位置可以在|3031918|Target+->+build+settings+=>+"Build+locations"+->+Precompiled+headers+cached+path|code-block|syntax|javascript|3031919|使用以下命令删除此文件夹|3031920|#rm+-fr+SharedPrecompiledHeaders|3031921|​|3031922|📷|atomic|offset|length|3031923|3031924|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/f4d81c5ea277855efe3265962f41b779.png|imageAlt^0|0|0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|15|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|16|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|17|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|18|8|@]|9|@]|A|$]]|$1|O|3|P|5|Q|7|19|8|@]|9|@$R|1A|S|1B|1|1C]]|A|$]]|$1|T|3|N|5|6|7|1D|8|@]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11|12|-4]]]]

Specially if you build from command line or you have a build script, cleaning xcode target is not enough. You have delete this folder. 

The precompiled header location can be found in the 

<pre><code>Target -&gt; build settings =&gt; "Build locations" -&gt; Precompiled headers cached path
</code></pre>

Delete this folder with,

<pre><code>#rm -fr SharedPrecompiledHeaders
</code></pre>

<img src="https://i.stack.imgur.com/spKrt.png" alt="enter image description here">

blocks|key|3032031|text|在我的例子中，我以这种方式删除了SharedPrecompiledHeaders下的所有文件，一切都开始正常工作：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3032032|sudo+find+/var/folders/+-type+d+-name+"SharedPrecompiledHeaders"+%7C+xargs+-n+1+-I+dir+sudo+find+dir+-name+\*+-type+f+-delete|code-block|syntax|javascript|3032033|entityMap^0|G|O|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

in my case I got rid of all files under SharedPrecompiledHeaders this way and everything started to work fine:

<pre><code>sudo find /var/folders/ -type d -name "SharedPrecompiledHeaders" | xargs -n 1 -I dir sudo find dir -name \* -type f -delete
</code></pre>

blocks|key|3032299|text|对于我来说，当我将我的项目复制到另一个位置时，这总是会发生。我这样做是为了把它推到回购或其他什么地方。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3032300|我必须删除新旧位置中的Build文件夹(rm+-rf+Build/)才能使其正常工作。这是有意义的，因为Build文件夹将包含与新位置无关的数据。|3032301|在这种情况下，清除派生数据或删除sharedPrecompiledHeaders文件夹并不能真正做到这一点。|3032302|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|$]]

For me this would always happen when I copy my project to another location. I'd do this to push it into a repo or something. 

I have to delete the Build folder (rm -rf Build/) in the old and new locations to get it working. It makes sense because the Build folder will have data that is irrelevant to the new location. 

Cleaning Derived Data or deleting the sharedPrecompiledHeaders folders didn't really do it in this case.

blocks|key|196555|text|如果它不能通过清洁来解决。这是一个构建缓存问题-按住Option键并导航到Product+>+Clean+build文件夹。这解决了我的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|196556|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|$]]

If it's not solved by cleaning. It's a build cache problem - hold down Option key and navigate to Product > Clean Build Folder. That fixed my problem.

blocks|key|2819599|text|在我的例子中，Xcode在我的项目主bundle(/Users/Path_to_your_project_source_code/YourProjectName/DerivedData)中创建了DerivedData文件夹|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2819600|我刚刚从我的源码包中删除了这个文件夹，现在它可以工作了。|2819601|要检查，请转到Xcode首选项->位置，并查看DerivedData是否被选为“相对”。请看下面的图片|2819602|📷|atomic|offset|length|2819603|​|2819604|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/91889998a0337531b3d1f983ca89989b.png|imageAlt^0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|X|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|Y|8|@]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T|U|-4]]]]

In my case Xcode was creating the DerivedData folder in my project main bundle(/Users/Path_to_your_project_source_code/YourProjectName/DerivedData)

I just deleted this folder from my source code bundle and now it is working.

To check Go to Xcode Preferences->Locations and see if DerivedData is selected to "Relative". See the picture below
<a href="https://i.stack.imgur.com/v4iII.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/v4iII.png" alt="enter image description here"></a>

blocks|key|2819146|text|您应该按住"shift+%2B+command+%2B+C"，然后您将成功构建|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2819147|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|$]]

you should holding down "shift + command + C",and then you will build succeed

blocks|key|3031866|text|清除和/或删除派生数据对我不起作用。所做的工作是触摸/保存.pch文件(添加一个字符，然后删除它)，以强制重建它。这就起到了作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3031867|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|$]]

Cleaning and/or deleting derived data did not work for me. What did work is touching/saving the .pch file (add a character, then delete it) to force it to be rebuilt. This did the trick.

blocks|key|194093|text|如果进行干净的构建对您不起作用，请在/var/folders/../SharedPrecompiledHeaders中查找PCH文件并删除PCH文件，这对我很有效。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|194094|entityMap^0|I|14|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|$]]

If doing a clean build does not work for you, look for the PCH files in <code>/var/folders/../SharedPrecompiledHeaders</code> and remove the PCH files, which worked for me.

blocks|key|192477|text|已更新|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|192478|这对我来说非常有效：|192479|192480|关闭项目或工作区。在查找器中打开project.|unordered-list-item|192481|Clean：⇧shift%2B⌘cmd%2BK|192482|Build：|192483|：⇧shift%2B⌘cmd%2BG|192484|Paste：~/Library/Developer/Xcode/DerivedData/|192485|Delete+|192486|+ModuleCache文件夹并清空垃圾桶。|192487|打开您的Finder⌘cmd%2BB|192488|192489|xCode+7.3.1|192490|参考here|192491|entityMap|0|LINK|mutability|MUTABLE|url|https://ungacy.atlassian.net/wiki/display/IOS/PCH%2Bwas%2Bcompiled%2Bwith%2Bmodule%2Bcache^0|0|3|0|0|0|0|0|0|0|0|0|0|0|0|0|2|4|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1F|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]|$1|I|3|J|5|K|7|1H|8|@]|D|@]|E|$]]|$1|L|3|M|5|K|7|1I|8|@]|D|@]|E|$]]|$1|N|3|O|5|K|7|1J|8|@]|D|@]|E|$]]|$1|P|3|Q|5|K|7|1K|8|@]|D|@]|E|$]]|$1|R|3|S|5|K|7|1L|8|@]|D|@]|E|$]]|$1|T|3|U|5|K|7|1M|8|@]|D|@]|E|$]]|$1|V|3|W|5|6|7|1N|8|@]|D|@]|E|$]]|$1|X|3|Y|5|K|7|1O|8|@]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|1P|8|@]|D|@]|E|$]]|$1|10|3|11|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|12|3|13|5|6|7|1R|8|@]|D|@$9|1S|A|1T|1|1U]]|E|$]]|$1|14|3|-4|5|6|7|1V|8|@]|D|@]|E|$]]]|15|$16|$5|17|18|19|E|$1A|1B]]]]

UPDATED

This worked perfectly for me: 

<ul>
<li>Close your project or workspace.</li>
<li>In Finder: ⇧shift+⌘cmd+G</li>
<li>Paste: ~/Library/Developer/Xcode/DerivedData/</li>
<li>Delete the ModuleCache folder and empty trash.</li>
<li>Open up your project.</li>
<li>Clean: ⇧shift+⌘cmd+K</li>
<li>Build: ⌘cmd+B</li>
</ul>

xCode 7.3.1 
reference <a href="https://ungacy.atlassian.net/wiki/display/IOS/PCH+was+compiled+with+module+cache" rel="nofollow">here</a>

blocks|key|194737|text|如果要通过xcodebuild执行命令行构建，请查看是否使用了-derivedDataPath+BUILD_DIR选项。如果是这样的话，您的ModuleCache.noindex目录将位于BUILD_DIR中，而不是普通的Xcode位置。删除ModuleCache.noindex目录，即可完成所有设置。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|194738|我遇到这种情况是因为我正在构建一个React+Native应用程序，而iOS客户端通常是通过React+Native工具集从命令行构建的。|194739|entityMap^0|5|A|V|Q|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

If you are doing a command line build via <code>xcodebuild</code>, then see if the <code>-derivedDataPath BUILD_DIR</code> option is used. If so, your ModuleCache.noindex directory will be in the BUILD_DIR instead of the normal Xcode location. Delete the ModuleCache.noindex directory and you will be all set.

I ran into this situation because I am building a React Native app, and the iOS client is typically built from the command line via the React Native toolset.

blocks|key|194639|text|我尝试过清理项目和build文件夹，但都不起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|194640|在那之后，我完全退出了xCode，删除了其标准位置的派生数据文件夹：~/Library/Developer/+xCode+/DerivedData，再次启动xCode并构建了项目。|194641|这似乎为我解决了问题。|194642|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've tried cleaning the project and cleaning the build folder which both didn't work.

After that, I quit xCode completely, deleted the derived data folder at its standard location: ~/Library/Developer/Xcode/DerivedData, started xCode again and built the project. 

That seemed to have resolved the problem for me.

blocks|key|194391|text|我只是删除了DerivedData，为我自己工作。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|194392|entityMap^0|6|B|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|$]]

I just deleted <code>DerivedData</code> and worked for me.

When I try to build my app in <code>Xcode</code>, I get this error message:

<blockquote>
 PCH file built from a different branch ((clang-425.0.24)) than the
 compiler ((clang-425.0.27))
</blockquote>

It doesn't happen before, but this was the first build after updating Xcode.

Other apps work, but not this specific one.

If I turn off the <code>"Precompile Prefix Header"</code> setting, it works.

How do I fix this error and still keep that setting on?

How to fix PCH error?

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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当我尝试在Xcode中构建我的应用程序时，我得到了这个错误消息：从与编译器((clang-425.0.27))不同的分支((  -425.0.24))构建的clang PCH文件这在以前是不会发生的，但这是更新Xcode后的第一次构建。其他应用程序也可以，但不是这个。如果我关闭"Precompile Prefix Header"设置，它可以工作。如何修复此错误并保持该设置为启用状态？

问如何修复PCH错误？
EN

回答 21

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