我注意到游戏Ravensky City可以发送直接请求。
示例： http ://www.rashka.ru/tmp/rc.png
他们是否与 FaceBook 有特殊协议可以这样做 - 或者任何应用程序都可以这样做？如果有怎么办？
（我今天阅读了很多文档和答案，但只知道这是不可能的）
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What you see here is just a regular Application Requests that can be sent in two ways:
- User to User – by using Requests Dialog
- App to User – by publishing request via Graph API
If you already user of application you'll see this as requests. If you not yet connected with application you'll see request as invitation.
于 2012-02-28T17:45:37.990 回答