从基于macOS Swift的应用程序中运行Apple脚本时失败

我需要做两件事来解决我的问题:

1) 将以下内容添加到我的应用程序的授权文件中:

<key>com.apple.security.temporary-exception.apple-events</key>
<array>
  <string>com.apple.Mail</string>
</array>

2) 将以下内容添加到我的应用程序的plist中:

<key>NSAppleEventsUsageDescription</key>
<string>Please allow "your message here"</string>

这适用于Mojave 10.14(18A389)

当我在我的应用程序中运行相同的脚本时,虽然它失败了,但声明邮件应用程序没有运行(即使它正在运行):

let unreadEmailsScript = """
                         tell application "Mail"
                           get unread count of inbox
                         end tell
                         """
 if let scriptObject = NSAppleScript(source: unreadEmailsScript) {
   var errorDict: NSDictionary? = nil
   scriptObject.executeAndReturnError(&errorDict)

   if let error = errorDict {
     print(error)
   }
 }

输出:

{
    NSAppleScriptErrorAppName = Mail;
    NSAppleScriptErrorBriefMessage = "Application isn't running.";
    NSAppleScriptErrorMessage = "Mail got an error: Application isn't running.";
    NSAppleScriptErrorNumber = "-600";
    NSAppleScriptErrorRange = "NSRange: {33, 12}";
}

我以前从未在应用程序中执行过苹果脚本。是因为权限问题吗?