Xamarin.ios UI测试，无法运行iOS UI测试-无法确定X的模拟器版本

当我想为iOS运行UI测试时，我会收到以下消息：

SetUp : System.Exception : Unable to determine simulator version for X

堆栈跟踪：

  at Xamarin.UITest.iOS.Instruments.GetMajorVersionForSimulator (System.String deviceIdentifier) [0x0008c] in <2a16c16730a54859bda72c6bc1c728f7>:0 
  at Xamarin.UITest.iOS.iOSAppLauncher.LaunchAppLocal (Xamarin.UITest.Configuration.IiOSAppConfiguration appConfiguration, Xamarin.UITest.Shared.Http.HttpClient httpClient, System.Boolean clearAppData) [0x0011a] in <2a16c16730a54859bda72c6bc1c728f7>:0 
  at Xamarin.UITest.iOS.iOSAppLauncher.LaunchApp (Xamarin.UITest.Configuration.IiOSAppConfiguration appConfiguration, Xamarin.UITest.Shared.Http.HttpClient httpClient, Xamarin.UITest.TestCloud.TestCloudiOSAppConfiguration testCloudAppConfiguration, Xamarin.UITest.Shared.Http.HttpClient testCloudWsClient, Xamarin.UITest.Shared.Http.HttpClient xtcServicesClient, System.Boolean testCloudUseDeviceAgent) [0x00068] in <2a16c16730a54859bda72c6bc1c728f7>:0 
  at Xamarin.UITest.iOS.iOSApp..ctor (Xamarin.UITest.Configuration.IiOSAppConfiguration appConfiguration, Xamarin.UITest.Shared.Execution.IExecutor executor) [0x002af] in <2a16c16730a54859bda72c6bc1c728f7>:0 
  at Xamarin.UITest.iOS.iOSApp..ctor (Xamarin.UITest.Configuration.IiOSAppConfiguration appConfiguration) [0x00000] in <2a16c16730a54859bda72c6bc1c728f7>:0 
  at Xamarin.UITest.Configuration.iOSAppConfigurator.StartApp (Xamarin.UITest.Configuration.AppDataMode appDataMode) [0x00017] in <2a16c16730a54859bda72c6bc1c728f7>:0 
  at UniversalApp.UITests.AppInitializer.StartApp (Xamarin.UITest.Platform platform) [0x0002d] in /Users/testing/backend/src/UniversalApp.UITests/AppInitializer.cs:33 
  at UniversalApp.UITests.DummyTests.BeforeEachTest () [0x00001] in /Users/testing/backend/src/UniversalApp.UITests/DummyTests.cs:26 
  at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0003b] in /Users/builder/jenkins/workspace/build-package-osx-mono/2018-08/external/bockbuild/builds/mono-x64/mcs/class/corlib/System.Reflection/MonoMethod.cs:305 

位于Xamarin.UITest.iOS.Instruments.GetMajorVersionForSimulator（System.String deviceIdentifier）[0x0008c]中：0
在Xamarin.UITest.iOS.iOSAppLauncher.LaunchAppLocal（Xamarin.UITest.Configuration.IiOSAppConfiguration-appConfiguration，Xamarin.UITest.Shared.Http.HttpClient-HttpClient，System.Boolean clearAppData）[0x0011a]中：0
在Xamarin.UITest.iOS.iOSAppLauncher.LaunchApp（Xamarin.UITest.Configuration.IiOSAppConfiguration-appConfiguration，Xamarin.UITest.Shared.Http.HttpClient-HttpClient，Xamarin.UITest.TestCloud.testCloudAppConfiguration-testCloudAppConfiguration，Xamarin.UITest.Shared.Http.HttpClient-xtcServicesClient，System.Boolean testCloudUseDeviceAgent）[0x00068]输入：0
在Xamarin.UITest.iOS.iOSApp..ctor（Xamarin.UITest.Configuration.IiOSAppConfiguration-appConfiguration，Xamarin.UITest.Shared.Execution.IExecutor-executor）[0x002af]中：0
在：0中的Xamarin.UITest.iOS.iOSApp..ctor（Xamarin.UITest.Configuration.IiOSAppConfiguration-appConfiguration）[0x00000]处
在Xamarin.UITest.Configuration.iOSAppConfigurator.StartApp（Xamarin.UITest.Configuration.AppDataMode-AppDataMode）[0x00017]中：0
在/Users/testing/backend/src/UniversalApp.UITests.AppInitializer.StartApp（Xamarin.UITest.Platform）[0x0002d]中的/Users/testing/backend/src/UniversalApp.UITests/AppInitializer.cs:33
在/Users/testing/backend/src/UniversalApp.UITests.DummyTests.beforeachtests（）[0x00001]中的/Users/testing/backend/src/UniversalApp.UITests/DummyTests.cs:26
在（包装器管理为本机）System.Reflection.MonoMethod.InternalInvoke（System.Reflection.MonoMethod，object，object[]，System.Exception&）
在System.Reflection.MonMethod.Invoke（System.Object obj、System.Reflection.BindingFlags invokeAttr、System.Reflection.Binder Binder、System.Object[]参数、System.Globalization.CultureInfo区域性）[0x0003b]在/Users/builder/jenkins/workspace/build包osx mono/2018-08/external/bockbuild/builds/mono-x64/mcs/class/corlib/System.Reflection/MonoMethod.cs:305中

当我在Android上运行sames测试时，一切都像一个魔咒。这发生在我从xcode 10.2降级到10.1的时候，所以可能有什么东西坏了。然而奇怪的是，我可以毫无问题地调试我的iOS应用程序

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提前感谢

导致此问题的原因是Xcode 10.2更改了Xamarin.UITest与本地iOS模拟器的连接方式；需要在恢复兼容性之前更新Xamarin.UITest。即使您降级到Xcode 10.1，iOS模拟器似乎保留了Xcode 10.2和Xcode 10.2应用的一些设置因此，根据我在复制问题时的观察，继续阻止测试

支持Xcode 10.2的Xamarin.UITest的最新版本尚未发布，不过我怀疑它将出现在下一版本中。（撰写本文时的最新版本是2.2.7.28-dev）

这在以前的其他Xcode更新中也发生过：

• “[iOS]Xcode 10.1集成：修复默认模拟器选择”
• “[iOS]提供对Xcode 10的支持”
• “[iOS]提供对Xcode 10 beta 6的支持”
• “[iOS]Xcode 9.4.1支持”
• “[iOS]支持Xcode 9.3和iOS 11.3”
• 等等

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更新3.0.7版的Xamarin.ui测试，为我解决了这个问题

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我还联系了app center支持团队。如果他们有答案，我会在这里发布。Xamarin.UITest 3.0.0.0修复了该问题