D-Bus 乒乓球
演示使用 D-Bus 的简单消息系统。
Ping Pong是一个命令行示例，演示了 Qt D-Bus.向另一个应用程序发送一条消息，并对消息进行确认。
运行示例
要从 Qt Creator，打开Welcome 模式，然后从Examples 中选择示例。更多信息，请参阅Qt Creator: 教程：构建并运行。
运行pong 应用程序，并以消息为参数运行ping 应用程序。
$ ./pong &
$ ./ping Hello
Reply was: ping("Hello") got called
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