在Visual Studio上运行Xamarin Forms iOS时发生GetBuiltProjectOutputRe

在Visual studio上运行Xamarin.iOS时，似乎遇到了这个奇怪的问题。这是在我更新到最新的Xamarin（今天）之后发生的。

不过我已经连接到了我的Mac。我试着用谷歌搜索，没有答案。。。

error MSB4057:项目中不存在目标"GetBuiltProjectOutputRecursive"

问题出在哪里？在更新之前，它起作用了！

1>------ Build started: Project: GTS.Mobile.iOS, Configuration: Debug iPhoneSimulator ------
1>  Generated session id: 04dbf5285bd918e0f3e1fc41e6f65f8c
1>  Generated build app name: GTSMobileiOS
1>  Connecting to Mac server 192.168.9.164...
1>C:'Users'kkh'Computas'CargoNet'GTS.Mobile'packages'Microsoft.Bcl.Build.1.0.21'build'Microsoft.Bcl.Build.targets(243,5): warning : All projects referencing GTS.Mobile.csproj must install nuget package Microsoft.Bcl.Build. For more information, see http://go.microsoft.com/fwlink/?LinkID=317569.
1>  Consider app.config remapping of assembly "System.Runtime, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" from Version "1.5.11.0" [] to Version "4.0.0.0" [C:'Program Files (x86)'Reference Assemblies'Microsoft'Framework'Xamarin.iOS'v1.0'Facades'System.Runtime.dll] to solve conflict and get rid of warning.
1>  Consider app.config remapping of assembly "System.IO, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" from Version "1.5.11.0" [] to Version "4.0.0.0" [C:'Program Files (x86)'Reference Assemblies'Microsoft'Framework'Xamarin.iOS'v1.0'Facades'System.IO.dll] to solve conflict and get rid of warning.
1>  Consider app.config remapping of assembly "System.Net.Http, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" from Version "1.5.0.0" [C:'Users'kkh'Computas'CargoNet'GTS.Mobile'GTS.Mobile'GTS.Mobile'bin'Debug'System.Net.Http.dll] to Version "4.0.0.0" [C:'Program Files (x86)'Reference Assemblies'Microsoft'Framework'Xamarin.iOS'v1.0'System.Net.Http.dll] to solve conflict and get rid of warning.
1>  Consider app.config remapping of assembly "System.Threading.Tasks, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" from Version "1.5.11.0" [] to Version "4.0.0.0" [C:'Program Files (x86)'Reference Assemblies'Microsoft'Framework'Xamarin.iOS'v1.0'Facades'System.Threading.Tasks.dll] to solve conflict and get rid of warning.
1>C:'Program Files (x86)'MSBuild'14.0'bin'Microsoft.Common.CurrentVersion.targets(1819,5): warning MSB3276: Found conflicts between different versions of the same dependent assembly. Please set the "AutoGenerateBindingRedirects" property to true in the project file. For more information, see http://go.microsoft.com/fwlink/?LinkId=294190.
1>  GTS.Mobile.iOS -> C:'Users'kkh'Computas'CargoNet'GTS.Mobile'GTS.Mobile.iOS'bin'iPhoneSimulator'Debug'GTSMobileiOS.exe
1>C:'Program Files (x86)'MSBuild'Xamarin'iOS'Xamarin.iOS.Common.After.targets(59,36): error MSB4057: The target "GetBuiltProjectOutputRecursive" does not exist in the project.