带参数的CreateAnonymousThread [英] CreateAnonymousThread with parameters

问题描述

在C＃中，我们有 ParameterizedThreadStart ，它允许我们创建一个向其传递参数的线程，如下所示：

In C# we have ParameterizedThreadStart that allows us to create a thread passing parameters to it, like so:

Thread thread = new Thread (new ParameterizedThreadStart(fetchURL));
thread.Start(url);

// ...
static void fetchURL(object url)
{
    // ...
}

我尝试使用 CreateAnonymousThread 在Delphi上重现，但似乎并没有

I tried to reproduce on Delphi using CreateAnonymousThread but it seems that it does not accept arguments.

如何创建匿名线程并将参数传递给被调用的过程？

How can I create an anonymous thread and pass argument to the called procedure?

推荐答案

TThread.CreateAnonymousThread 将匿名方法作为参数，这样您就可以将传入的方法放在一起您想要的任何值。这些值将被捕获，因此在传递参数时需要格外小心。阅读上面的匿名方法链接中的变量绑定机制部分，以获取有关变量捕获的更多信息。

TThread.CreateAnonymousThread takes an anonymous method as a parameter so you can put together a method that passes in any values that you would like. These values are captured so you will need to be careful when passing in the parameters. Read the "Variable Binding Mechanism" section in the anonymous method link above for more information about variable capture.

例如：

procedure DoSomething(const aWebAddress: String);
begin
end;

procedure BuildThread;
var
  myThread: TThread;
  fetchURL: string;
begin
  fetchURL := 'http://stackoverflow.com';
  // Create an anonymous thread that calls a method and passes in
  // the fetchURL to that method.
  myThread := TThread.CreateAnonymousThread(
    procedure
    begin
      DoSomething(fetchURL);
    end);
  ...
end;

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