在Delphi中是否需要使用GUID？

问题描述

官方文件说它们是可选的。我知道COM interop需要每个接口的唯一标识符，但是我看到的每个接口示例都有一个GUID是否与COM一起使用？是否有任何好处包括一个GUID，如果它不会被用于COM？

解决方案

我注意到一些方法例如（以确定类是否符合特定接口）要求您在使用GUID之前定义GUID。

通过以下信息确认：

这里有一些，其中指出：

以两个引号加重。

阅读整篇文章也让您意识到（需要GUID）在幕后使用，原因如引用计数。

The official documentation says they are optional. I know COM interop requires a unique identifier for each interface but every interface example I see has a GUID whether it's used with COM or not? Is there any benefit to including a GUID if its not going to be used with COM?

解决方案

I've noticed that some methods such as Supports (to determine if a class conforms to a specific interface) require that you define a GUID before you can use them.

This page confirms it with the following information:

Here's some interesting information about interfaces, which states:

Emphasis added in both quotes.

Reading this entire article also makes you realize that QueryInterface (which requires a GUID) is used behind the scenes for reasons such as reference counting.

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