Xcode Error: The service is invalid (0XE8000022)
真机调试时遇上如下情况：
The service is invalid
Please check your setup and try again
(0XE8000022)
这个未越狱设备的解决方法， 很不凑效，未越狱的可能要抹掉数据恢复设置了：
解决办法：
Xcode and the GDB connection is quite temperamental. The device and your Mac can become unsynchronised with each other. My checklist for this sort of thing:
- Restart Xcode.
- Delete the .app from your iOS device, do a Clean then Rebuild.
- Disconnect, reconnect device.
- Restart iOS device (90% of the time it fixes things)
- If all else fails, restart your Mac (unlikely but it did fix an issue once for me).
参考：http://stackoverflow.com/questions/2160299/error-the-service-is-invalid
但是对于恢复设备这种最有效却很弱的方法是很坑的，要折腾很久，还要担心资料损失
下面介绍我的解决方法，
设备连接Mac，Xcode的Organizer中找到设备，
然后在设备的Console里面就有设备连接不上的报错日志：
Apr 5 14:14:38 shoukaikokorotobira installd[47] <Error>: 0x1583000 filter_attributes: Info.plist keys requested via MobileInstallationLookup/Browse in client Xcode (via mobile_installation_proxy) were not found in MobileInstallation's cache. Please file a bug requesting that these keys be added: <CFBasicHash 0x1ee75da0 [0x39d76100]>{type = mutable set, count = 18, entries => 0 : <CFString 0x39d629f4 [0x39d76100]>{contents = "CFBundlePackageType"} 1 : <CFString 0x1ee2da20 [0x39d76100]>{contents = "BuildMachineOSBuild"} 2 : <CFString 0x39d63a44 [0x39d76100]>{contents = "CFBundleResourceSpecification"} 3 : <CFString 0x1ee75880 [0x39d76100]>{contents = "DTPlatformBuild"} 4 : <CFString 0x39d60794 [0x39d76100]>{contents = "DTCompiler"} 5 : <CFString 0x39d62564 [0x39d76100]>{contents = "CFBundleSignature"} 6 : <CFString 0x39d63224 [0x39d76100]>{contents = "DTSDKName"} 7 : <CFString 0x1ee75920 [0x39d76100]>{contents = "NSBundleResolvedPath"} 8 : <CFString 0x39d5feb4 [0x39d76100]>{contents = "UISupportedInterfaceOrientations"} 10 : <CFString 0x39d67e84 [0x39d76100]>{contents = "DTXcode"} 13 : <CFString 0x39d67eb4 [0x39d76100]>{contents = "CFBundleInfoDictionaryVersion"} 16 : <CFString 0x39d65304 [0x39d76100]>{contents = "CFBundleSupportedPlatforms"} 17 : <CFString 0x1ee758c0 [0x39d76100]>{contents = "DTXcodeBuild"} 18 : <CFString 0x1ee75a80 [0x39d76100]>{contents = "UIStatusBarTintParameters"} 19 : <CFString 0x39d63e54 [0x39d76100]>{contents = "DTPlatformVersion"} 20 : <CFString 0x39d66bf4 [0x39d76100]>{contents = "DTPlatformName"} 21 : <CFString 0x39d67c84 [0x39d76100]>{contents = "CFBundleDevelopmentRegion"} 22 : <CFString 0x1ee758a0 [0x39d76100]>{contents = "DTSDKBuild"} }
Apr 5 14:14:38 shoukaikokorotobira lockbot[525] <Notice>: 3b6eeb88 __spawn_agent_block_invoke_0: Unable to spawn /Developer/Library/Daemons/DTFetchSymbols:13 Permission denied
Apr 5 14:14:38 shoukaikokorotobira lockdownd[45] <Notice>: 01581000 lockbot_spawn_agent: lockbot returned an error: SpawnFailed
Apr 5 14:14:38 shoukaikokorotobira lockdownd[45] <Notice>: 01581000 spawn_service_agent: Could not spawn service agent via lockbot
Apr 5 14:14:38 shoukaikokorotobira lockdownd[45] <Notice>: 01581000 spawn_and_handle_checkin: Could not spawn the com.apple.dt.fetchsymbols service agent:InvalidService
看到这里就知道原因了，是连接Gdb服务获取设备号的可执行文件的权限变了，Deamon进程启动不了，
我的iPad是越狱的很容易就修复了，无需重启
在iPad终端（越狱的可以去Cydia安装）里面进入终端输入命令即可
（无终端的话可以用ssh连接iPhone， 用户名：root，密码：alpine）
chmod a+x /Developer/Library/Daemons/*
收工可以继续连Xcode调试玩了，