xcode iOS/tvOS 操场因“无法找到所选运行目标的执行服务”而失败

iOS/tvOS playground fails with "Unable to find execution service for selected run destination"

提问by courteouselk

After migrating to XCode 7.1 I can not use playground with iOS and tvOS platforms. Only OS X works. Simplest playground code produces error message:

迁移到 XCode 7.1 后，我无法在 iOS 和 tvOS 平台上使用 Playground。只有 OS X 有效。最简单的操场代码产生错误信息：

Unable to find execution service for selected run destination

无法找到所选运行目标的执行服务

I suspect it has to do with XCode not finding the right simulator, however I have no idea where and how to configure it.

我怀疑这与 XCode 找不到合适的模拟器有关，但是我不知道在哪里以及如何配置它。

I tried playground in the existing project, as well as just newly created one from the splash screen.

我在现有项目中尝试过游乐场，以及刚从启动画面中新创建的游乐场。

Any ideas what might be wrong?

任何想法可能有什么问题？

UPDATE:

更新：

Checking console gives a bit more insight, but still not clear how to fix:

检查控制台可以提供更多信息，但仍然不清楚如何修复：

24/10/2015 10:16:10,193 lsd[279]: LaunchServices: Could not store lsd-identifiers file at /private/var/db/lsd/com.apple.lsdschemes.plist
24/10/2015 10:16:10,212 com.apple.usbmuxd[82]: LOCKDOWN_V2_BONJOUR_SERVICE_NAME is _apple-mobdev2._tcp,8de107c0
24/10/2015 10:16:10,248 Xcode[819]:  DeveloperPortal: Using pre-existing current store at URL (file:///Users/courteouselk/Library/Developer/Xcode/DeveloperPortal%207.1.db).
24/10/2015 10:16:10,381 com.apple.CoreSimulator.CoreSimulatorService[461]: Requested phone is is not available for pairing.  Assuming it has the capability.
24/10/2015 10:16:10,384 com.apple.CoreSimulator.CoreSimulatorService[461]: Requested phone is is not available for pairing.  Assuming it has the capability.
24/10/2015 10:16:12,929 com.apple.usbmuxd[82]: _SendAttachNotification Device 80:ea:96:04:a5:da@fe80::82ea:96ff:fe04:a5da._apple-mobdev2._tcp.local. has already appeared on interface 4. Suppressing duplicate attach notification.
24/10/2015 10:16:13,311 GPUToolsAgent[832]: Mac Agent inited !!!
24/10/2015 10:16:14,287 Xcode[819]: <DYMobileDevice: 0x7ffbfd6b6320>: failed to acquire service transport reservation: Error Domain=DYAMDErrorDomain Code=-402653150 "(null)"
24/10/2015 10:16:14,447 Xcode[819]: [MT] IDEPlaygroundEditor: Error encountered attempting to run playground: Error Domain=IDEPlaygroundErrorDomain Code=1 "Unable to find execution service for selected run destination." UserInfo={NSLocalizedDescription=Unable to find execution service for selected run destination.}
24/10/2015 10:16:19,672 mdworker[255]: LaunchServices: received XPC_ERROR_CONNECTION_INTERRUPTED trying to map database
24/10/2015 10:16:19,672 mdworker[255]: LaunchServices: Database mapping failed with result -10822, retrying
24/10/2015 10:16:19,672 mdworker[255]: LaunchServices: received XPC_ERROR_CONNECTION_INTERRUPTED trying to map database
24/10/2015 10:16:19,673 mdworker[255]: LaunchServices: received XPC_ERROR_CONNECTION_INTERRUPTED trying to map database
24/10/2015 10:16:19,673 mdworker[255]: LaunchServices: Database mapping failed with result -10822, retrying
24/10/2015 10:16:19,673 mdworker[255]: LaunchServices: received XPC_ERROR_CONNECTION_INTERRUPTED trying to map database
24/10/2015 10:16:19,674 mdworker[255]: LaunchServices: received XPC_ERROR_CONNECTION_INTERRUPTED trying to map database
24/10/2015 10:16:19,674 mdworker[255]: LaunchServices: Database mapping failed with result -10822, retrying
24/10/2015 10:16:19,674 mdworker[255]: LaunchServices: received XPC_ERROR_CONNECTION_INTERRUPTED trying to map database
24/10/2015 10:16:19,674 mdworker[255]: LaunchServices: received XPC_ERROR_CONNECTION_INTERRUPTED trying to map database
24/10/2015 10:16:19,674 mdworker[255]: LaunchServices: Database mapping failed with result -10822, retrying
24/10/2015 10:16:19,675 mdworker[255]: LaunchServices: received XPC_ERROR_CONNECTION_INTERRUPTED trying to map database
24/10/2015 10:16:20,497 Xcode[819]: CompanionProxy: _SocketReadCallback:128 (0x0x700000117000): Failed to receive response from AMDevice 0x7ffbfe60cad0 {UDID = e4bfce5e11be0bcf730ada45b4d6ae81f1abdb01, device ID = 23, FullServiceName = 80:ea:96:04:a5:da@fe80::82ea:96ff:fe04:a5da._apple-mobdev2._tcp.local.}: 0xe8000084
24/10/2015 10:16:20,497 Xcode[819]: CompanionProxy: _SocketReadCallback:200 (0x0x700000117000): Stopped listening for paired devices from AMDevice 0x7ffbfe60cad0 {UDID = e4bfce5e11be0bcf730ada45b4d6ae81f1abdb01, device ID = 23, FullServiceName = 80:ea:96:04:a5:da@fe80::82ea:96ff:fe04:a5da._apple-mobdev2._tcp.local.}: 0xe8000084

采纳答案by courteouselk

Ok, after some struggle, here's the solution.

好的，经过一番挣扎，这是解决方案。

1. Clean up the folder ~/Library/Developer/CoreSimulator
2. Restart the machine
3. Try running an iOS Playground, it should work without problems now.

1. 清理文件夹 ~/Library/Developer/CoreSimulator
2. 重启机器
3. 尝试运行 iOS Playground，它现在应该可以正常工作了。

Note:In my case I renamed CoreSimulatorto CoreSimulator.old, and after restart a new CoreSimulatorwas auto-created (so, I just threw away the .oldone).

注意：在我的情况下，我重命名CoreSimulator为CoreSimulator.old，并在重新启动后CoreSimulator自动创建一个新的（因此，我只是扔掉了那个.old）。

BTW, there is a file ~/Library/Developer/CoreSimulator/Devices/device_set.plistwith whole list of Simulators under /Root/DefaultDevices. I think this is where the problem was coming from.

顺便说一句，~/Library/Developer/CoreSimulator/Devices/device_set.plist在/Root/DefaultDevices. 我认为这就是问题的来源。

回答by Alexander Borisenko

There may be a faster solution:

可能有一个更快的解决方案：

Check that you have iPad Pro simulatorin your devices in Xcode. If not – add it via Add Simulator option.

在 Xcode 中检查您的设备中是否有iPad Pro 模拟器。如果没有 - 通过添加模拟器选项添加它。

As some have noted in comments, you may also need to restart Xcode or reopen the playground.

正如一些人在评论中指出的那样，您可能还需要重新启动 Xcode 或重新打开 Playground。

To add a simulator go to Devices (Window > Devices). Click the + button at the far bottom left of the window, click "Add Simulator", then select the appropriate "Device Type" from the dropdown and click "Create".

要添加模拟器，请转到设备（窗口 > 设备）。单击窗口最左下角的 + 按钮，单击“添加模拟器”，然后从下拉列表中选择适当的“设备类型”并单击“创建”。

回答by Soberman

I was able to resolve this issue with these two commands in the Terminal:

我能够在终端中使用这两个命令解决这个问题：

$ rm -rf ~/Library/Developer/CoreSimulator/Devices
$ killall -9 com.apple.CoreSimulator.CoreSimulatorService

回答by emdog4

Delete everything inside your DerivedData folder, ~/Library/Developer/Xcode/DerivedData, and then restart Xcode

删除 DerivedData 文件夹中的所有内容，~/Library/Developer/Xcode/DerivedData，然后重新启动 Xcode

回答by Subbu

Add all the simulators in xcode--> window-->devices.

在xcode--> window-->devices中添加所有模拟器。

and restart the xcode it will works fine

并重新启动 xcode 它将正常工作

回答by Jay

Xcode 8 update. Ran into a similar message

Xcode 8 更新。遇到类似的消息

"selected platform is not available"

“所选平台不可用”

With the playground open, in the upper right of the window, the last icon on the right: Hide or Show the Utilities. Click that, then in that area click the icon on the left: Show File Inspector.

打开 Playground 后，在窗口的右上角，右侧的最后一个图标：隐藏或显示实用程序。单击它，然后在该区域单击左侧的图标：显示文件检查器。

Then in the Playground Settings popup it may be set for unknown. Change it to your Platform of choice (OS X for me) then you should be good to go.

然后在 Playground Settings 弹出窗口中，它可能被设置为未知。将其更改为您选择的平台（对我来说是 OS X），然后您就可以开始使用了。