我面临一个奇怪的情况，
更新Visual Studio 2019后，我无法在iOS中运行该应用程序，当我尝试从链接到Mac的Windows计算机上运行时会发生这种情况。但当我使用Visual Studio for Mac而不是windows运行该应用程序时，该应用程序运行时没有问题。
我查看了Xcode的VS配置和路径，并且是正确的(/Applications/Xcode.app(。Mac上的路径存在并且是可访问的。
我尝试了以下解决方案，但不起作用：打开模拟器-->单击顶部菜单模拟器-->单击**重置内容和设置**此外，在Windows和Mac中，体系结构都是x86_64。
Windows计算机：Visual Studio 2019专业版16.3.7Xamarin.iOS和Xamarin。Mac SDK-13.4.0.2(e37549b(
Mac：Visual Studio 2019 Enterprise for Mac 8.3.5版(内部版本13(Xcode 11.2(11B52(Xamarin.iOS和Xamarin。Mac SDK-13.4.0.2(e37549bc(
Windows上VS的输出：输出控制台：应用程序已终止。启动失败。应用程序"AppName"无法在"iPhone 11 iOS 13.2"上启动。错误：错误HE0042:无法在设备"iOS 13.2(17B84(-iPhone 11"上启动应用程序"PackageName"：打开"Package Name"的请求失败。。请查看日志以了解更多详细信息。应用程序已终止。
生成输出：
Using Xcode 11.2 found in /Applications/Xcode.app/Contents/Developer
Xamarin.Hosting: Xamarin.Hosting
Xamarin.Hosting: Version: 3064e2c463 (d16-3)
Xamarin.Hosting: Xcode: /Applications/Xcode.app
Xamarin.Hosting: Xcode Version: 11.2
Xamarin.Hosting: Verbosity: 1
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTFoundation.framework/Versions/A/DVTFoundation
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTiPhoneSimulatorRemoteClient.framework/DVTiPhoneSimulatorRemoteClient
Xamarin.Hosting: Loaded /Library/Developer/PrivateFrameworks/CoreSimulator.framework/CoreSimulator
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DTDeviceKitBase.framework/DTDeviceKitBase
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTKit.framework/DVTKit
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DTDeviceKit.framework/DTDeviceKit
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DTXConnectionServices.framework/DTXConnectionServices
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTSourceControl.framework/DVTSourceControl
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTServices.framework/DVTServices
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTPortal.framework/DVTPortal
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTDocumentation.framework/DVTDocumentation
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTAnalyticsClient.framework/DVTAnalyticsClient
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/DVTAnalytics.framework/DVTAnalytics
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/SourceKit.framework/SourceKit
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/Frameworks/IDEFoundation.framework/IDEFoundation
Xamarin.Hosting: Loaded /Applications/Xcode.app/Contents/SharedFrameworks/IDEProducts.framework/IDEProducts
Xamarin.Hosting: Simulator watchdogs are not disabled for 'iOS 13.2 (17B84) - iPhone 11'.
Xamarin.Hosting: Shutting down simulator...
Xamarin.Hosting: Successfully disabled simulator watchdogs for 'iOS 13.2 (17B84) - iPhone 11'.
Xamarin.Hosting: Launching simulator application 'com.apple.iphonesimulator'
Xamarin.Hosting: Booting iPhone 11...
Xamarin.Hosting: Booted iPhone 11 successfully.
Xamarin.Hosting: No need to boot (already booted): iPhone 11
Xamarin.Hosting: Installing /Users/angyay0/Library/Caches/Xamarin/mtbs/builds/App.iOS/fb8bb79d47458ad099aab10c40ce7836/bin/iPhoneSimulator/Debug/App.iOS.app with Bundle Identifier PackageName on 'iOS 13.2 (17B84) - iPhone 11'...
Xamarin.Hosting: Installed 'PackageName' from /Users/angyay0/Library/Caches/Xamarin/mtbs/builds/App.iOS/fb8bb79d47458ad099aab10c40ce7836/bin/iPhoneSimulator/Debug/App.iOS.app
Xamarin.Hosting: Could not find any potentially troublesome weak load commands.
Xamarin.Hosting: The bundle id PackageName was successfully installed.
Xamarin.Hosting: Creating shared memory for:
__XAMARIN_DEBUG_PORT__=59082
Xamarin.Hosting: Created shared memory id: 65536
Xamarin.Hosting: Mapped shared memory: 0x1091ff000 for key 301399 and id 65536
Xamarin.Hosting: Launching com.hebmex.sg on 'iOS 13.2 (17B84) - iPhone 11'
Xamarin.Hosting: Could not launch the app 'PackageName' on the device 'iOS 13.2 (17B84) - iPhone 11': The request to open "PackageName" failed., will try to reinstall the app
Xamarin.Hosting: Created shared memory token: 301399
Xamarin.Hosting: Installing /Users/angyay0/Library/Caches/Xamarin/mtbs/builds/App.iOS/fb8bb79d47458ad099aab10c40ce7836/bin/iPhoneSimulator/Debug/App.iOS.app with Bundle Identifier PackageName on 'iOS 13.2 (17B84) - iPhone 11'...
Xamarin.Hosting: Installed 'PackageName' from /Users/angyay0/Library/Caches/Xamarin/mtbs/buildsApp.iOS/fb8bb79d47458ad099aab10c40ce7836/bin/iPhoneSimulator/Debug/App.iOS.app
Xamarin.Hosting: Could not find any potentially troublesome weak load commands.
我终于解决了它。
Windows上的VS和CoreSimulator之间存在通信错误。框架
我运行了以下命令来重新安装CoreSimulator。来自终端的框架：
sudo rm -Rf /Library/Developer/PrivateFrameworks/CoreSimulator.framework/Versions/*
/Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -runFirstLaunch
然后Xamarin.iOS项目的配置更改了调试端口(新端口(，在执行模式下通过iOS运行选项进行配置，设置为默认无后台获取。
我希望它能帮助其他人解决这个问题。
这对我有效：
- 将Visual Studio更新到16.11.2
- 在Visual Studio中"iOS Build"下的iOS项目属性中，我选中了"使用并发垃圾收集器">