blocks|key|2609452|text|对于我来说，我不知道该接受哪一个答案，就是安装一个稍后的测试版(beta+5)。几个月前，我向Apple提交了一个bug，所以我认为他们通过更新Xcode解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2609453|有人在当前的官方发布中经历过这种情况吗？|2609454|我现在把这个作为回答，但是如果有人有更详细的解释，我很乐意删除我的答案，并接受你的答案。|2609455|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 am not sure which answer to accept as for me what worked was installing a later beta (beta 5). I had filed a bug to Apple a couple of months ago so I assume they solved this problem by updating Xcode. 

Anyone experiencing this with the current official release? 

I post this as answer for now but if anyone has a more detailed explanation I will be happy to remove my answer and accept yours.

blocks|key|2609404|text|我在xcode+7+beta+3中遇到了同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2609405|我的部署目标设置为8.3。将其设置为9.0、清理构建并重新启动xcode对我有效。|2609406|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 ran into the same issue with xcode 7 beta 3.

I had my deployment target set to 8.3. Setting it to 9.0, cleaning the build, and restarting xcode worked for me.

blocks|key|2325892|text|尝试删除并重新安装您的Xcode+beta，它在Xcode+beta+3上对我有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2325893|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 deleting and reinstalling your Xcode beta, it worked for me on Xcode beta 3

blocks|key|2325973|text|这似乎是一个常见的问题。在苹果开发者论坛上找到了一个答案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2325974|https://forums.developer.apple.com/thread/11706|offset|length|2325975|如果链接关闭或您无法访问，这是接受的答案：|2325976|2015年7月21日seancook的正确答案5:58+PM
我也在埃尔卡皮坦上经历过这个。NIB不会加载，也不会出现Sims，并且无法通过Xcode/Open工具/模拟器菜单启动模拟器。经过几个小时的斗争，我终于让它起作用了。下面是对我起作用的东西(YMMV)：我注意到在Console.app中有一条消息是仿真器运行时没有被签名的。我走到了它描述的"/Library/Developer/CoreSimulator/Profiles/Runtimes“的路径上，删除了我在那里的运行时。它们是旧的运行时，所以我假设Xcode中的某些签入现在应用了以前没有的。谁知道呢？
这样做之后，我最终可以通过Xcode/工具菜单启动模拟器。不幸的是，模拟器在我的工作空间中仍然没有显示为一个运行目标，所以我一直在探索.然后我进入了模拟器的硬件/设备/管理设备菜单，并添加了一个新的iOS9设备。它似乎什么也没做，所以我退出了Xcode和Simulator.app。然后，我重新启动了Simulator.app+(通过Xcode/ODT/仿真器)和lo，然后显示了预期的iOS9模拟器。我关闭并重新打开了Xcode，更改了我的项目的目标操作系统，Sims最终被显示为运行目标。
HTH。|blockquote|style|BOLD|2325977|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1B|0|0|0|0|U|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@$D|V|E|W|1|X]]|A|$]]|$1|F|3|G|5|6|7|Y|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|Z|8|@$D|10|E|11|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|C]]]]

It seems this is a common issue. Found an answer over at Apple's developer forums: 

<a href="https://forums.developer.apple.com/thread/11706" rel="nofollow">https://forums.developer.apple.com/thread/11706</a>

In case the link goes dead or you have no access, this is the accepted answer: 

<blockquote>
 Correct Answer by seancook on Jul 21, 2015 5:58 PM
 
 I experienced this, too, on El Capitan. NIBs wouldn't load, no Sims
 present, and unable to launch Simulators through the Xcode/Open
 Developer Tool/Simulator menu. After fighting it for a few hours I've
 finally got it working. Here's what worked for me (YMMV): I
 noticed a message in Console.app along the lines of the Simulator
 runtime not being code signed. I went to the path it described
 "/Library/Developer/CoreSimulator/Profiles/Runtimes" and removed the
 runtimes that I had there. They were old runtimes, so I assume that
 some check in Xcode now applies that didn't previously. Who knows? 
 After doing this, I could finally launch the Simulator via the
 Xcode/Open Developer Tool menu. Unfortunately, the Simulator still
 wasn't being shown as a run target in my workspace, so I kept
 spelunking... I then went into the Simulator's
 Hardware/Devices/Manage Devices menu and added a new iOS9 device. It
 didn't seem to do anything, so I quit out of Xcode and Simulator.app.
 I then re-started Simulator.app (via Xcode/ODT/Simulator) and lo and
 behold the expected iOS9 simulators were displayed. I closed and
 re-opened Xcode, changed the target OS for my project, and the Sims
 were finally displayed as run targets.
 
 HTH.
</blockquote>

blocks|key|2326015|text|我在Xcode+7.0版本构建(7A220)中遇到了这个错误。我也是在设备上运行，根本不使用模拟器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2326016|我做了一个干净干净的文件夹。选项，关闭Xcode，然后打开活动监视器。我发现一堆Ibtool进程正在运行。我终止了所有这些并重新启动了Xcode。|offset|length|style|BOLD|2326017|又开始了！|2326018|entityMap^0|0|14|6|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|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|$]]

I got this error on with Xcode 7.0 release build (7A220). I was running on device too not using the simulator at all.

I did a full clean Clean build folder... option, close Xcode and then opened up Activity Monitor. I found a bunch of Ibtool processes running. I terminated all of these and restart Xcode.

All going again!

blocks|key|2609379|text|验证您有最新的Xcode+Beta安装Xcode-beta打开点击“关于Xcode”，并检查版本号。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2609380|然后检查Xcode下载页面上最新Xcode-beta的当前版本号：|2609381|https://developer.apple.com/xcode/downloads/|offset|length|2609382|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|18|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@$F|R|G|S|1|T]]|A|$]]|$1|H|3|-4|5|6|7|U|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|E]]]]

Verify you have the latest Xcode Beta installation with Xcode-beta open click "About Xcode" and check the build number.

Then check the Current build number of the latest Xcode-beta on the Xcode Downloads Page:

<a href="https://developer.apple.com/xcode/downloads/" rel="nofollow">https://developer.apple.com/xcode/downloads/</a>

blocks|key|2609512|text|首先，您的堆栈跟踪没有显示与我找到的答案相关的任何内容，但是，我的堆栈跟踪似乎也与我无关。但它对我有效，希望对你有用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2609513|苹果员工的回答是：https://forums.developer.apple.com/thread/3978|offset|length|2609514|有人说：“我们在WWDC的实验室里看到了这种情况。坠机是由一个违规的自定义颜色选择器引起的。请尝试删除安装在系统上的任何自定义颜色选择器。”|2609515|简单地说，从系统中删除相关的颜色选择器，关闭xcode并重新启动。|2609516|entityMap|0|LINK|mutability|MUTABLE|url|https://forums.developer.apple.com/thread/3978^0|0|9|1A|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q]]]]

First of all, your stack trace does not show anything relevant with the answer which I found, however, my stack trace also seemed me irrelevant. But it worked for me and hope that works for you:

Someone from Apple staff gave the answer at:
<a href="https://forums.developer.apple.com/thread/3978" rel="nofollow">https://forums.developer.apple.com/thread/3978</a>

What was said is "We saw this in the labs at WWDC. The crash was caused by an offending custom color picker. Try removing any custom color pickers you have installed on your system"

In brief, delete related color picker from your system, close the xcode and relaunch.

blocks|key|2609518|text|我要检查的另一件事是您使用的命令行是什么. |type|unstyled|depth|inlineStyleRanges|entityRanges|data|2609519|我不得不使用不同的版本，我用: 修改了它们|2609520|sudo+xcode-select+--switch+/Applications/Xcode8.app/Contents/Developer/|code-block|syntax|javascript|2609521|(您也可以在XCode/Preferences/Location中更改它) |2609522|我想我的问题是我使用的是8.1版本的 |2609523|您可以看到您正在使用的comand行： |2609524|xcode-select+-p|2609525|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Another things I would check it's what command line you are using. 

I had to use a different version and I changed them with : 

<pre><code>sudo xcode-select --switch /Applications/Xcode8.app/Contents/Developer/
</code></pre>

( You can also change it in the XCode/Preferences/Location ) 

I think my problem was that I was using the version 8.1 

You can see the comand line you are using with: 

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

EDIT: This question refers to teh pre-release version of Xcode 7, hence it may not be relevant if you are running the currently released version as some issues may have been fixed.

<hr>

I get the following:

<blockquote>
 Failed to connect with the iOS agent. Please file a bug report at
 bugreport.apple.com.
</blockquote>

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

Why is that?

If I look at the details I get:

<blockquote>
 =================================
 
 <h1> ERROR:</h1>
 
 Failed to find or create execution context for description
 System content
 1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity
 (Failure reason: Software caused connection abort): Failed to find
 newest available Simulator runtime (Failure reason: Software caused
 connection abort): Simulator verification failed. (Failure reason: A
 connection to the simulator verification service could not be
 established.)
 
 Error Domain=NSPOSIXErrorDomain Code=53 "Failed to find or create
 execution context for description
 System content
 1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity"
 UserInfo=0x7fcf5961ebd0 {NSLocalizedDescription=Failed to find or
 create execution context for description
 System content
 1x for IBCocoaTouchFramework-EightAndLater w/ default fidelity,
 NSUnderlyingError=0x7fcf58b72950 "Failed to find newest available
 Simulator runtime"}
</blockquote>

After installing Xcode 7 I can't build and run projects anymore as document fails to open

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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编辑:这个问题指的是Xcode 7的预发布版本，因此如果您正在运行当前发布的版本，可能与此无关，因为可能已经解决了一些问题。我得到以下信息：未能与iOS代理连接。请向bugreport.apple.com提交一份错误报告。​​为什么会这样呢？如果我看看我得到的细节：=================================错误：未能为IBCocoaTouchFramework找到或创建描述

问安装Xcode 7之后，由于文档无法打开，我无法再构建和运行项目
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