Firemonkey IFMXLoggingService Windows事件日志位置 [英] Firemonkey IFMXLoggingService Windows Event Log Location

问题描述

我正在通过Log类（它使用IFMXLoggingService编写事件）来查看内置的FMX日志支持。我在iOS和Android中找到了日志文件位置的信息，但在Windows（8.1）上找不到任何内容。

I am looking at the FMX built in logging support via the Log class which uses the IFMXLoggingService to write events. I have found info for the log file location in iOS and Android but unable to find anything on Windows (8.1).

有人知道此服务写入哪个特定日志文件吗？ ？

Does anyone know which specific log file this service writes to? and is this able to be changed in code or otherwise?

谢谢

推荐答案

如果您查看源代码，则会在 FMX.Platform.Win.TPlatformWin.Log 中找到实现：

If you look at the sources you will find the implementation at FMX.Platform.Win.TPlatformWin.Log:

procedure TPlatformWin.Log(const Fmt: string; const Params: array of const);
begin
  OutputDebugString(PChar(Format(Fmt, Params)));
end;

OutputDebugString（）不会向任何日志文件。当应用程序在调试器中运行时，它将记录到调试器的内置事件日志中。当应用在调试器之外运行时，第三方工具，例如 SysInternal DebugView 可以捕获这些消息。

OutputDebugString() does not send messages to any log file at all. It logs to the debugger's built-in event log, when the app is running inside the debugger. When the app is running outside of the debugger, third-party tools like SysInternal DebugView can capture these messages.

如果要使用自定义记录器，请编写一个实现 IFMXLoggingService 接口并在运行时向FMX注册：

If you want to use a custom logger, write a class that implements the IFMXLoggingService interface and register it with FMX at runtime:

type
  TMyLoggingService = class(TInterfacedObject, IFMXLoggingService)
  public
    procedure Log(const Format: string; const Params: array of const);
  end;

procedure TMyLoggingService.Log(const Format: string; const Params: array of const);
begin
  // do whatever you want...
end;

var
  MyLoggingService : IFMXLoggingService;
begin
  MyLoggingService := TMyLoggingService.Create;

  // if a service is already registered, remove it first
  if TPlatformServices.Current.SupportsPlatformService( IFMXLoggingService ) then
    TPlatformServices.Current.RemovePlatformService( IFMXLoggingService );

  // now register my service
  TPlatformServices.Current.AddPlatformService( IFMXLoggingService, MyLoggingService );
end;

在 Embarcadero的文档：

您可以使用 TPlatformServices.AddPlatformService 和 TPlatformServices.RemovePlatformService 分别用于注册和取消注册平台服务。

You can use TPlatformServices.AddPlatformService and TPlatformServices.RemovePlatformService to register and unregister platform services, respectively.

例如，您可以注销其中一个内置平台服务，并用适合您需要的平台服务的新实现替换它。

For example, you can unregister one of the built-in platform services and replace it with a new implementation of the platform service that is tailored to fit your needs.

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