如何在Windows/Mac上从FireMonkey启动电子邮件客户端？

Question

是否有一种从FireMonkey启动电子邮件客户端的跨平台方法，以便它可以在Windows和OS/X上工作。在windows下，我可以执行以下操作：

ShellExecute(0, 'OPEN', 'mailto:somebody@somewhere.com', '', '', SW_ShowDefault);

是否存在等同于启动电子邮件客户端的跨平台功能(最好包含附件、收件人、主题、正文等)？

Answer 1

据我所知，没有一种跨平台的方式来发送邮件，但是使用Windows端的ShellExecute函数和用于OSX的NSWorkspace.openURL，您可以编写自己的实现。

尝试这个OSX实现。

uses
  Macapi.Foundation,
  Macapi.AppKit,
  System.SysUtils;

Procedure SendMail(const Mailto,Subject, Body:string);
var
  URL : NSURL;
  AWorkspace : NSWorkspace;
  encodedSubject,
  encodedTo,
  encodedBody    : NSString;
begin
  //NSString *encodedSubject = [NSString stringWithFormat:@"SUBJECT=%@", [subject stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
  encodedSubject :=NSSTR(Format('SUBJECT=',[Subject])).stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding);
  //NSString *encodedBody = [NSString stringWithFormat:@"BODY=%@", [body stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
  encodedBody    :=NSSTR(Format('BODY=',[Body])).stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding);
  //NSString *encodedTo = [to stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
  encodedTo      :=NSSTR(Mailto).stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding);
  //NSString *encodedURLString = [NSString stringWithFormat:@"mailto:%@?%@&%@", encodedTo, encodedSubject, encodedBody];
  //NSURL *mailtoURL = [NSURL URLWithString:encodedURLString];
  // [[NSWorkspace sharedWorkspace] openURL:mailtoURL];
  URL := TNSURL.Create;
  URL.initWithString(NSSTR(Format('mailto:%s?%s&%s',[ encodedTo.UTF8String, encodedSubject.UTF8String, encodedBody.UTF8String])));
  AWorkspace := TNSWorkspace.Create;
  AWorkspace.openURL(URL);
end;