Xamarin 热重载未初始化失败

Question

最后一次更新 Visual Studio 版本 16 后。9.x 并更新到 Xamarin.Forms 5.0 热重载无法正常工作。

这是我在启动应用程序时得到的输出：

Hot Reload IDE Extension Loaded
(FinansovoPregledi.Android) XAML Hot Reload is using 'changes only' mode
XAML Hot Reload initializing...
WARN: (FinansovoPregledi.Android) Unknown Breakpoint Hit: Android.Runtime.JNIEnv.RegisterJniNatives( typeName_ptr, int typeName_len,  jniClass,  methods_ptr, int methods_len)
ERROR: Caught exception in AgentStatusChangedHandler at 268: Xamarin.HotReload.EvaluatorException: Failed to Inject Assembly ---> Mono.Debugging.Evaluation.EvaluatorException: Method `Load' not found in type `System.Reflection.Assembly'.
   at Mono.Debugging.Soft.SoftDebuggerAdaptor.OverloadResolveMulti(SoftEvaluationContext ctx, TypeMirror type, String methodName, ArgumentType[] genericTypeArgs, TypeMirror returnType, ArgumentType[] argTypes, List`1 candidates, Boolean throwIfNotFound, Boolean tryCasting) in C:\A6\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerAdaptor.cs:line 2619
   at Mono.Debugging.Soft.SoftDebuggerAdaptor.OverloadResolveMulti(SoftEvaluationContext ctx, TypeMirror type, String methodName, ArgumentType[] genericTypeArgs, TypeMirror returnType, ArgumentType[] argTypes, Boolean allowInstance, Boolean allowStatic, Boolean throwIfNotFound, Boolean tryCasting) in C:\A6\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerAdaptor.cs:line 2511
   at Mono.Debugging.Soft.SoftDebuggerAdaptor.RuntimeInvoke(EvaluationContext ctx, Object targetType, Object target, String methodName, Object[] genericTypeArgs, Object[] argTypes, Object[] argValues, Boolean enableOutArgs, Object[]& outArgs) in C:\A6\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerAdaptor.cs:line 2304
   at Mono.Debugging.Soft.SoftDebuggerAdaptor.RuntimeInvoke(EvaluationContext ctx, Object targetType, Object target, String methodName, Object[] genericTypeArgs, Object[] argTypes, Object[] argValues) in C:\A6\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerAdaptor.cs:line 2281
   at Xamarin.HotReload.HotReloadSharedBridge.InjectAndLoadAssembly(IProject project, SoftEvaluationContext context, String assemblyPath) in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadSharedBridge.cs:line 359
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)
   --- End of inner exception stack trace ---
   at Xamarin.HotReload.HotReloadSharedBridge.InjectAndLoadAssembly(IProject project, SoftEvaluationContext context, String assemblyPath) in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadSharedBridge.cs:line 374
   at Xamarin.HotReload.HotReloadBridge.<InitializeAgent>d__47.MoveNext() in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadBridge.cs:line 140
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Xamarin.HotReload.HotReloadBridge.<<Debugger_TargetHitBreakpoint>b__50_0>d.MoveNext() in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadBridge.cs:line 242
   at Xamarin.HotReload.HotReloadSharedBridge.InjectAndLoadAssembly(IProject project, SoftEvaluationContext context, String assemblyPath) in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadSharedBridge.cs:line 374
   at Xamarin.HotReload.HotReloadBridge.<InitializeAgent>d__47.MoveNext() in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadBridge.cs:line 140
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Xamarin.HotReload.HotReloadBridge.<<Debugger_TargetHitBreakpoint>b__50_0>d.MoveNext() in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadBridge.cs:line 242
XAML Hot Reload encountered a problem and failed to start. Use Help -> Report a Problem if the issues persists.
Stopping All Hot Reload sessions due to Failed ...
(FinansovoPregledi.Android) Stopping a Hot Reload session due to Failed ...
Stopped Hot Reload session.
ERROR: (FinansovoPregledi.Android) Caught exception in Debugger_TargetHitBreakpoint at 246: Xamarin.HotReload.EvaluatorException: Failed to Inject Assembly ---> Mono.Debugging.Evaluation.EvaluatorException: Method `Load' not found in type `System.Reflection.Assembly'.
   at Mono.Debugging.Soft.SoftDebuggerAdaptor.OverloadResolveMulti(SoftEvaluationContext ctx, TypeMirror type, String methodName, ArgumentType[] genericTypeArgs, TypeMirror returnType, ArgumentType[] argTypes, List`1 candidates, Boolean throwIfNotFound, Boolean tryCasting) in C:\A6\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerAdaptor.cs:line 2619
   at Mono.Debugging.Soft.SoftDebuggerAdaptor.OverloadResolveMulti(SoftEvaluationContext ctx, TypeMirror type, String methodName, ArgumentType[] genericTypeArgs, TypeMirror returnType, ArgumentType[] argTypes, Boolean allowInstance, Boolean allowStatic, Boolean throwIfNotFound, Boolean tryCasting) in C:\A6\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerAdaptor.cs:line 2511
   at Mono.Debugging.Soft.SoftDebuggerAdaptor.RuntimeInvoke(EvaluationContext ctx, Object targetType, Object target, String methodName, Object[] genericTypeArgs, Object[] argTypes, Object[] argValues, Boolean enableOutArgs, Object[]& outArgs) in C:\A6\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerAdaptor.cs:line 2304
   at Mono.Debugging.Soft.SoftDebuggerAdaptor.RuntimeInvoke(EvaluationContext ctx, Object targetType, Object target, String methodName, Object[] genericTypeArgs, Object[] argTypes, Object[] argValues) in C:\A6\s\external\debugger-libs\Mono.Debugging.Soft\SoftDebuggerAdaptor.cs:line 2281
   at Xamarin.HotReload.HotReloadSharedBridge.InjectAndLoadAssembly(IProject project, SoftEvaluationContext context, String assemblyPath) in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadSharedBridge.cs:line 359
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)
   --- End of inner exception stack trace ---
   at Xamarin.HotReload.HotReloadSharedBridge.InjectAndLoadAssembly(IProject project, SoftEvaluationContext context, String assemblyPath) in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadSharedBridge.cs:line 374
   at Xamarin.HotReload.HotReloadBridge.<InitializeAgent>d__47.MoveNext() in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadBridge.cs:line 140
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Xamarin.HotReload.HotReloadBridge.<<Debugger_TargetHitBreakpoint>b__50_0>d.MoveNext() in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadBridge.cs:line 242
   at Xamarin.HotReload.HotReloadSharedBridge.InjectAndLoadAssembly(IProject project, SoftEvaluationContext context, String assemblyPath) in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadSharedBridge.cs:line 374
   at Xamarin.HotReload.HotReloadBridge.<InitializeAgent>d__47.MoveNext() in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadBridge.cs:line 140
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Xamarin.HotReload.HotReloadBridge.<<Debugger_TargetHitBreakpoint>b__50_0>d.MoveNext() in D:\a\s\HotReload\Source\Xamarin.HotReload.Bridge\HotReloadBridge.cs:line 242

有没有人遇到同样的问题？我尝试了所有平台的一切，还选择刷新整个页面，但没有解决我的问题。没有 Hot Reload 太难了。

Answer 1

在您的 Android 和 iOS 构建设置中，检查 Linker 是否设置为“不要 Link”或“Link” None”。关于 XAML Hot Reload for Xamarin.Forms 的更多详细信息，您可以查看：

https://docs.microsoft.com/en-us/xamarin/xamarin-forms/xaml/hot-reload

Xamarin 热重载未初始化失败

Xamarin Hot Reload not failed to initialize

c#

visual-studio

xamarin

xamarin.forms

hot-reload