没有专门为此目的的事件。您必须使用 OnStatus 事件中。 manmaster / ssl / SSL_get_version.html rel = nofollow> SSL_get_version（） 函数。

There is no event specifically for that purpose. You would have to query the underlying SSL object directly, such as in the OnStatus event, using the SSL_get_version() function.

但是，您仅将 Method 设置为TLS 1.2，因此Indy将使用全部（只要您使用支持1.2的OpenSSL版本，否则Indy将使用悄无声息地回落到1.0）。

However, you are setting the Method to TLS 1.2 exclusively, so that is all Indy will use (as long as you use a version of OpenSSL that supports 1.2, otherwise Indy will silently fallback to 1.0).

另一方面，您的 UseSSL if块看起来应该更像这样：

On a side note, your UseSSL if block should look more like this:

If UseSSL then
Begin
  If (SSL = nil) then
  Begin
    SSL := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
    SSL.SSLOptions.Mode := sslmClient;
    SSL.OnGetPassword := SSLGetPassword;
    SSL.SSLOptions.Method := sslvTLSv1_2;
  End;
  HTTP.IOHandler := SSL;
end;