Xamarin.Forms iOS 项目未能解决 "System.Runtime.InteropServices.StandardOleMarshalObject"
Xamarin.Forms iOS Project Failed to Resolve "System.Runtime.InteropServices.StandardOleMarshalObject"
更新到 Xcode 10.0（在 Mac 上）和 Xamarin.Forms v3.2.0.871581（在 Mac/PC），我无法再成功构建我的 Forms.iOS 项目。
它不仅没有成功构建，而且经常会尝试部署到 iPhoneSimulator，但在尝试在 sim 上安装应用程序时却失败了。
这是我遇到的错误：
Failed to resolve "System.Runtime.InteropServices.StandardOleMarshalObject" reference from "System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
这是完整的崩溃日志输出：
1>------ Rebuild All started: Project: EISPocketJMS4.iOS, Configuration: Debug iPhoneSimulator ------
1> Connecting to Mac server 192.168.1.165...
1>C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\MSBuild\Xamarin\Xamarin.Sdk.targets(66,3): warning MSB3491: Could not write lines to file "obj\iPhoneSimulator\Debug\_TelemetryProps". Could not find a part of the path 'C:\Users\zach\Desktop\EISPocketJMS4_Solution\EISPocketJMS4\EISPocketJMS4.iOS\obj\iPhoneSimulator\Debug\_TelemetryProps'.
1> Connecting to Mac server 192.168.1.165...
1> No way to resolve conflict between "System.Numerics, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" and "System.Numerics, Version=2.0.5.0, Culture=neutral, PublicKeyToken=b77a5c561934e089". Choosing "System.Numerics, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" arbitrarily.
1> No way to resolve conflict between "System.Runtime.Serialization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" and "System.Runtime.Serialization, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e". Choosing "System.Runtime.Serialization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" arbitrarily.
1> Consider app.config remapping of assembly "System.Numerics, Culture=neutral, PublicKeyToken=b77a5c561934e089" from Version "2.0.5.0" [C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\Xamarin.iOS\v1.0\System.Numerics.dll] to Version "4.0.0.0" [C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Numerics\v4.0_4.0.0.0__b77a5c561934e089\System.Numerics.dll] to solve conflict and get rid of warning.
1>C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\MSBuild.0\Bin\Microsoft.Common.CurrentVersion.targets(2110,5): 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>C:\Users\zach\Desktop\EISPocketJMS4_Solution\EISPocketJMS4\EISPocketJMS4\Globals.cs(124,40,124,59): warning CS1998: This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.
1> EISPocketJMS4.iOS -> C:\Users\zach\Desktop\EISPocketJMS4_Solution\EISPocketJMS4\EISPocketJMS4.iOS\bin\iPhoneSimulator\Debug\EISPocketJMS4.iOS.exe
1> Detected signing identity:
1> Provisioning Profile: "iOS Team Provisioning Profile: *" ([removed for privacy])
1> Bundle Id: com.eis.EISPocketJMS4
1> App Id: DH32F99JXP.com.eis.EISPocketJMS4
1>C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\MSBuild\Xamarin\iOS\Xamarin.iOS.Common.targets(794,3): error MT2002: Failed to resolve "System.Runtime.InteropServices.StandardOleMarshalObject" reference from "System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
Xamarin Simulator - Failed to install
Failed to install //Users/ZachAibrary/Caches/Xamarin/mtbs/builds/EISPocketIMS4.iOS/1afdfObe9e0c1d15a5f8dfb4597 4398e/bin/iPhoneSimulator/Debug/EISPocketIMS4.i0S.app to 15C32787-E053AFCA-8598-D07E93B37640. Failed to launch the simulator. Could not find file "/Users/ZachAibrary/Caches/Xamarin/mtbs/builds/EISPocketiMS4.OS/1afdfObe9e0c1d15a5f8dfb45974398e/bin/iPhoneSimulator/Debug/EISPock etIMS4.i0S.app/EISPocketIMS4.i0S"
注意："Link Framework SDKs Only"和[=47我都试过了=] "Link All" 链接行为。
我已经研究了将近 2 天了，请帮忙！
谢谢
回答
对于解决问题的原因，我没有明确的答案，但以下是我采取的似乎可以解决问题的步骤...
- 已卸载所有项目
- 清理了整个解决方案
- 重启电脑
- 重新加载所有项目 -> 然后重建整个解决方案
- 将链接行为重新设置为 "Link All" （已设置回 "Link Framework SDKs Only"）
问题已解决。
更新到 Xcode 10.0（在 Mac 上）和 Xamarin.Forms v3.2.0.871581（在 Mac/PC），我无法再成功构建我的 Forms.iOS 项目。
它不仅没有成功构建，而且经常会尝试部署到 iPhoneSimulator，但在尝试在 sim 上安装应用程序时却失败了。
这是我遇到的错误：
Failed to resolve "System.Runtime.InteropServices.StandardOleMarshalObject" reference from "System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
这是完整的崩溃日志输出：
1>------ Rebuild All started: Project: EISPocketJMS4.iOS, Configuration: Debug iPhoneSimulator ------
1> Connecting to Mac server 192.168.1.165...
1>C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\MSBuild\Xamarin\Xamarin.Sdk.targets(66,3): warning MSB3491: Could not write lines to file "obj\iPhoneSimulator\Debug\_TelemetryProps". Could not find a part of the path 'C:\Users\zach\Desktop\EISPocketJMS4_Solution\EISPocketJMS4\EISPocketJMS4.iOS\obj\iPhoneSimulator\Debug\_TelemetryProps'.
1> Connecting to Mac server 192.168.1.165...
1> No way to resolve conflict between "System.Numerics, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" and "System.Numerics, Version=2.0.5.0, Culture=neutral, PublicKeyToken=b77a5c561934e089". Choosing "System.Numerics, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" arbitrarily.
1> No way to resolve conflict between "System.Runtime.Serialization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" and "System.Runtime.Serialization, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e". Choosing "System.Runtime.Serialization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" arbitrarily.
1> Consider app.config remapping of assembly "System.Numerics, Culture=neutral, PublicKeyToken=b77a5c561934e089" from Version "2.0.5.0" [C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\Common7\IDE\ReferenceAssemblies\Microsoft\Framework\Xamarin.iOS\v1.0\System.Numerics.dll] to Version "4.0.0.0" [C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Numerics\v4.0_4.0.0.0__b77a5c561934e089\System.Numerics.dll] to solve conflict and get rid of warning.
1>C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\MSBuild.0\Bin\Microsoft.Common.CurrentVersion.targets(2110,5): 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>C:\Users\zach\Desktop\EISPocketJMS4_Solution\EISPocketJMS4\EISPocketJMS4\Globals.cs(124,40,124,59): warning CS1998: This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.
1> EISPocketJMS4.iOS -> C:\Users\zach\Desktop\EISPocketJMS4_Solution\EISPocketJMS4\EISPocketJMS4.iOS\bin\iPhoneSimulator\Debug\EISPocketJMS4.iOS.exe
1> Detected signing identity:
1> Provisioning Profile: "iOS Team Provisioning Profile: *" ([removed for privacy])
1> Bundle Id: com.eis.EISPocketJMS4
1> App Id: DH32F99JXP.com.eis.EISPocketJMS4
1>C:\Program Files (x86)\Microsoft Visual Studio17\Enterprise\MSBuild\Xamarin\iOS\Xamarin.iOS.Common.targets(794,3): error MT2002: Failed to resolve "System.Runtime.InteropServices.StandardOleMarshalObject" reference from "System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========
Xamarin Simulator - Failed to install
Failed to install //Users/ZachAibrary/Caches/Xamarin/mtbs/builds/EISPocketIMS4.iOS/1afdfObe9e0c1d15a5f8dfb4597 4398e/bin/iPhoneSimulator/Debug/EISPocketIMS4.i0S.app to 15C32787-E053AFCA-8598-D07E93B37640. Failed to launch the simulator. Could not find file "/Users/ZachAibrary/Caches/Xamarin/mtbs/builds/EISPocketiMS4.OS/1afdfObe9e0c1d15a5f8dfb45974398e/bin/iPhoneSimulator/Debug/EISPock etIMS4.i0S.app/EISPocketIMS4.i0S"
注意："Link Framework SDKs Only"和[=47我都试过了=] "Link All" 链接行为。
我已经研究了将近 2 天了，请帮忙！
谢谢
回答
对于解决问题的原因，我没有明确的答案，但以下是我采取的似乎可以解决问题的步骤...
- 已卸载所有项目
- 清理了整个解决方案
- 重启电脑
- 重新加载所有项目 -> 然后重建整个解决方案
- 将链接行为重新设置为 "Link All" （已设置回 "Link Framework SDKs Only"）
问题已解决。