blocks|key|302886|text|在模拟器中重置内容和设置对我来说很有效。这在"iOS模拟器“菜单中可用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|302887|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|$]]

Resetting the content and settings in the simulator worked for me. This is available in the "iOS Simulator" menu.

blocks|key|302864|text|进入“产品”菜单，找到“编辑方案”菜单。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|302865|在Edit+Scheme窗口中，选择屏幕左侧的"Run“选项，然后在右侧将调试器从LLDB更改为GDB。|302866|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|$]]

go to the Product menu and find the Edit Scheme menu there.

While in Edit Scheme window, select the "Run" option on the left hand side of the screen and then on the right hand side, change the debugger from LLDB to GDB.

blocks|key|303033|text|与fundtimer的答案类似，本地主机文件似乎是罪魁祸首。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|303034|在无意更改后，我不得不将我的/etc/hosts权限改回默认权限：|offset|length|style|CODE|303035|sudo+chmod+644+/etc/hosts|code-block|syntax|javascript|303036|在那之后，模拟器/LLDB为我工作。|303037|entityMap^0|0|E|A|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|U|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Similar to fundtimer's answer, the local hosts file seems to have been the culprit.

I had to change my <code>/etc/hosts</code> permissions back to the default after an inadvertent change:

<pre><code>sudo chmod 644 /etc/hosts
</code></pre>

After that, simulator/LLDB worked for me.

blocks|key|519854|text|我不知何故从/etc/hosts文件中删除了记录，并且得到了相同的错误。您应该检查/etc/hosts文件中是否有"127.0.0.1+localhost“行。这对我很有帮助！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|519855|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|$]]

I had somehow removed or deleted records from my /etc/hosts file and I got the same error.
You should check whether you have in your /etc/hosts file the line "127.0.0.1 localhost".
This helped me!

blocks|key|520370|text|我知道这是一个老问题，但是当我在谷歌上搜索“无法附加到进程ID”时，这个问题首先出现了。我使用的是Xcode7。发生在iOS9发布后，我更新了我的swift应用程序以支持swift+2。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520371|在模拟器中删除我的应用程序，并执行新的构建和运行，将其清理干净。|520372|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 know this is an old question, but it came up first for me when I did a google search for "failed to attach to process ID". I'm using Xcode 7. Happened after iOS9 was released and I had updated my swift app for swift 2.

Deleting my app in the simulator and doing a new build and run cleared it up.

blocks|key|303137|text|我只是从模拟器中删除了应用程序(就像在实际设备上一样)，当我重新运行它时，一切工作正常。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|303138|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|$]]

I just removed the application from the simulator (just like you would on an actual device), and when I re-ran it everything worked fine.

blocks|key|303228|text|我也有同样的问题，对我来说解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|303229|只需从模拟器中删除应用程序，然后清除并运行项目。|303230|希望这对其他人也有帮助。|303231|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 also same problem and for me the solution is :-

Just delete the app from the Simulator and then clear and Run the project.

May it help also to someone else.

blocks|key|303384|text|我通过删除Xcode派生的数据内容修复了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|303385|在finder中，按SHIFT%2BCMD%2BG键并在path下键入，然后删除DerivedData中的所有数据：|303386|++~/Library/Developer/Xcode/DerivedData|code-block|syntax|javascript|303387|​|303388|📷|atomic|offset|length|303389|303390|还可以重置模拟器构建|303391|+++++~/Library/Application+Support/iPhone+Simulator/6.0/Applications+|303392|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/72f3d8d774be7989301a24a0c1ae367b.png|imageAlt^0|0|0|0|0|0|1|0|0|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]]|$1|I|3|J|5|6|7|16|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|17|8|@]|9|@$N|18|O|19|1|1A]]|A|$]]|$1|P|3|J|5|6|7|1B|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1C|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|1D|8|@]|9|@]|A|$G|H]]|$1|U|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|V|$W|$5|X|Y|Z|A|$10|11|12|-4]]]]

I fixed this problem by removing Xcode Derived data contents.

In finder press SHIFT+CMD+G and type below path and remove all data inside DerivedData:

<pre><code> ~/Library/Developer/Xcode/DerivedData
</code></pre>

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

Also reset simulator builds

<pre><code> ~/Library/Application Support/iPhone Simulator/6.0/Applications 
</code></pre>

blocks|key|519747|text|我刚刚在开发者论坛上发布了这篇文章。这是一个简单的解决方案，可能会对这里的某个人有所帮助：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|519748|我遇到了完全相同的问题:当使用任何当前版本的Xcode4.xx和LLDB调试器，以及任何版本的模拟器时，Xcode总是崩溃并显示“无法连接到进程...”。我唯一的解决方案是切换到GDB调试器。这是令人失望的，因为我真的想在XCode+4.6-DP中尝试新的，强大的LLDB。|519749|然后我想起来了；不久前我在...etc/hosts中更改了我的网络/服务器主机文件，以适应几个Apache2服务器虚拟主机，即，我删除了行：|519750|127.0.0.1本地主机|519751|就是这样。删除这一行，XCode在连接到带有LLDB的模拟器时崩溃。恢复这条线，XCode与LLDB和模拟器一起工作得很好。|519752|无论如何，这可能不是你的问题，但它值得探索。据我所知，这是一个严重的无文件记录的bug。|519753|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

I just posted this on the Developer Forum. It was a simple solution and may help someone here:

I had exactly the same problem: when using any current version of Xcode 4.xx and the LLDB debugger, plus any version of the Simulator, XCode consistently crashed with 'failed to attach to process ...' My only resolution was to switch to the GDB debugger. This was disappointing since I really wanted to try the new, robust LLDB in XCode 4.6-DP.

And then I remembered; I had changed my network/server host file at ...etc/hosts some time ago to accomodate several Apache2 server virtual hosts, i.e., I removed the line:

127.0.0.1 locahost

That was it. Removing that line, XCode crashed on attaching to the Simulator with LLDB.
Restoring that line, XCode worked just fine with LLDB and the Simulator.

Anyway, this may not be your problem but it's worth exploring. As far as I'm concerned, it's a serious undocumented bug.

blocks|key|303177|text|在我的例子中，解决方案是不同的:运行模式是"Release“。更改为"Debug“修复了此问题。Xcode+4.5.x对此没有问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|303178|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 the solution was different: the run mode was "Release". Changing to "Debug" fixed it. Xcode 4.5.x had no problem with it.

blocks|key|303440|text|上面的回答对我真的很有帮助。https://stackoverflow.com/a/12819757/1752988，因为在我的XCode中，我使用了故事板和自定义视图控制器。在它的警告列表中，我看到一些nib文件丢失了。我看到了这一幕，真的很高兴。然而，我看到了这个答案，尽管我不喜欢重置我的App模拟器内容，但我做到了，它真的对我起作用了。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|303441|此外，将调试器从产品->方案->编辑方案(运行)从LLDB更改为GDB对我也不起作用。|303442|附言：-对不起，我将这个答案添加到上面的支持评论中，因为我没有15个名誉度提升以上答案或50个名誉点来评论上面。|303443|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/12819757/1752988^0|E|18|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

Above answer really helped me.
<a href="https://stackoverflow.com/a/12819757/1752988">https://stackoverflow.com/a/12819757/1752988</a>
Because in my XCode I used story board and custom view controller. and in its warning list that I saw some of the nib files are missing. I was miss leaded by seeing that. However, I saw this answer,
and even though I didn't like to reset my App simulator content, I did it and it really worked for me.

And also Changing the Debugger from Product -> Scheme -> Edit Scheme (Run) from LLDB to GDB didn't work for me either.

P.s.:- Pardon me,I added this answer as a support comment to above, as I don't have 15 reputation upvote the above answer or 50 points of reputation to comment on above.

blocks|key|520251|text|我通过退出XCode和模拟器解决了这个问题。重新打开项目。好了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520252|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|$]]

I solved this problem by quitting XCode and Simulator. Reopen the Project. Done.

blocks|key|520454|text|这个问题的答案太多了，我没有看到我认为正确的答案。这是一个授权的问题。在终端中键入以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520455|sudo+DevToolsSecurity+-enable|offset|length|style|CODE|520456|entityMap^0|0|0|T|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|$]]

So many answers to this and I didn't see what I believe is the correct one. It's an issue with authorization. Type this in the Terminal:

<code>sudo DevToolsSecurity -enable</code>

blocks|key|302940|text|只需重置iOS模拟器的内容和设置，然后通过按下command%2Bshift%2Bk键来清理code.This来清理代码，这对我很有效|type|unstyled|depth|inlineStyleRanges|entityRanges|data|302941|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|$]]

Just reset content and settings of iOS simulator and then clean code by pressing command+shift+k keys to clean code.This worked for me

blocks|key|520016|text|尽管它很差劲，但重新启动计算机是唯一有效的解决方案。我尝试从LLDB切换到GDB，重置模拟器的内容，然后重新启动Xcode。唯一起作用的就是重新启动我的电脑，重新打开Xcode，然后重新运行应用程序。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520017|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|$]]

As lame as it is, restarting my computer was the only solution that worked. I tried switching from LLDB to GDB, resetting the contents of the Simulator, and restarting Xcode. The only thing that worked was restarting my computer, reopening Xcode, and re-running the app.

blocks|key|520049|text|我也有同样的问题。为了让它工作，我做了一些答案的组合。:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520050|通过在MenuBar中单击“产品”清除Build文件夹。按住Alt-键的同时单击"Clean+Build+Folder“。现在重新启动您的xcode和模拟器。现在它应该可以工作了。如果没有，还可以尝试更改包标识符和模拟器"Content+Reset“，然后重新启动xcode和模拟器。|520051|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 the same problem. I did some combinations of answers given to make it work. :) 

clean the Build Folder by clicking "Product" in the MenuBar. while pressing the Alt-key click on "Clean Build Folder". Now restart your xcode and simulator.
Now it should work. if not, also try changing bundle identifier and Simulator "Content Reset" and then restart xcode and simulator.

blocks|key|303420|text|今天遇到了这个。我不小心从我的目标设置中删除了我的启动图像。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|303421|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|$]]

Ran across this today. I accidentally removed my Launch images from my Target Settings.

blocks|key|520224|text|您是否有多个用户登录到您的计算机？我的笔记本电脑上有“个人”和“工作”账户。当我试图从我的个人帐户进行调试时，我得到了这个错误，但是我让模拟器在我的工作帐户中运行。在另一个帐户中退出模拟器解决了我的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520225|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|$]]

Do you have multiple users logged in to your machine? I have "personal" and "work" accounts on my laptop. I got this error when I was trying to debug from my personal account, but I had left the simulator running in my work account. Quitting the simulator in the other account fixed my problem.

blocks|key|520285|text|今天也有同样的问题。我使用的是Xcode+4.6.3。我关闭了我的项目，并在Xcode5中打开它，它运行得很完美。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520286|奇怪却是真的|520287|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|$]]

Also had same problem today. i was using Xcode 4.6.3. i closed my project and open it in Xcode 5 and it is running perfect.

Strange but True

blocks|key|520330|text|我也有同样的问题，在我的案例中，问题是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|520331|设置了“构建活动架构:否”。只需将其更改为YES，它就起作用了。|520332|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 the same problem, in my case the issue was :- 

Have set "Build active architectures : NO". Just changed it to YES and it worked.

blocks|key|303709|text|我知道这是老生常谈--但我的解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|303710|转到:目标>构建设置>链接->马赫-O类型=可执行文件|303711|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 know this is old - but the solution for me was the following:

Goto : Targets > Build settings > Linking -> Mach-O Type = Executable

blocks|key|303789|text|这个页面或相关页面Could+not+attach+to+pid+:+“####”+unable+to+attach上的答案对我都不起作用。(此外，我看到的症状还有一个在这些页面上没有提到的额外细节，那就是网守会出现并说它正在“验证”应用程序，即使它是在模拟器上运行的iOS应用程序。它总是在PID错误之前。)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|303790|以下是最终奏效的方法：|303791|我让xcode尝试启动并附加到模拟器中的应用程序。它像往常一样失败，网守“验证”，然后是PID错误。但是后来应用程序被安装在模拟器上，所以我只是在那里启动了它，它启动得很好(正如预期的那样)。但是后来我使用了xcode的Debug+>+Attach+to+process+...菜单项，并附加到运行应用程序的模拟器。这起作用了，现在它似乎已经解决了这个问题，我可以从xcode启动应用程序，它可以很好地连接到模拟器，让我进行调试，并且我不再看到Gatekeeper“验证”对话框。|303792|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/37582096/could-not-attach-to-pid-unable-to-attach^0|9|1D|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

None of the answers on this page or on the related page <a href="https://stackoverflow.com/questions/37582096/could-not-attach-to-pid-unable-to-attach">Could not attach to pid : “####” unable to attach</a> worked for me. (Also, the symptom I was seeing had an added detail that didn't see mentioned on any of these pages, which is that Gatekeeper would come up and say it was "verifying" the app, even though it was an iOS app running on the simulator. That always preceded the PID error.)

Here is what eventually did work:

I let xcode try to launch and attach to the app in the simulator. It failed as usual with the gatekeeper "verifying" and then the PID error. But then the app was installed on the simulator so I just started it there and it started fine (as expected). But then I used xcode's Debug > Attach to process ... menu item and attached to the simulator running the app. That worked, and now it seems to have fixed the problem and I can start the app from xcode and it attaches fine to the simulator and lets me debug, and I no longer get the Gatekeeper "verifying" dialog box.

Anyone has experienced this problem?
Yesterday I still can run my app in simulator but now I cannot run my app since Xcode prints this error in console:

<pre><code>error: failed to attach to process ID &lt;ID number&gt;
</code></pre>

<a href="https://i.stack.imgur.com/FzEfO.png" rel="noreferrer"><img src="https://i.stack.imgur.com/FzEfO.png" alt="Screenshot for error"></a>

I have tried to reinstall, do this <a href="https://stackoverflow.com/questions/10323481/thread-1-stopped-at-breakpoint-1/10323839#10323839">post</a> and create new project but returns no luck.
Anyone can resolve this issue?

I use Xcode 4.5 Preview 2 and try to run iOS simulator 6

Failed to Attach to Process ID Xcode

有没有人遇到过这个问题？昨天我仍然可以在模拟器中运行我的应用程序，但现在我不能运行我的应用程序，因为Xcode在控制台中打印了这个错误：error: failed to attach to process ID <ID number>​​我已经尝试重新安装，做这个和创建新的项目，但没有返回任何运气。有谁能解决这个问题吗？我使用Xcode4.5Preview2并尝试运行iOS模拟器6

问无法附加到进程ID Xcode
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回答 22

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回答 22

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