It is very usual that an iPhone send data to internet server.
But what if a server wants to connect to an iphone?
I have wondered long about it.
For example, like many web-based apps like Facebook, what is the mechanism/algorithm behind, so that when, for example, any updates on your wall can be noticed to you in a real-time manner?
希望有些人能够理解我的询问。
http://en.wikipedia.org/wiki/Push_technology”rel=“nofollow”
粉碎技术或服务器推导,是指由出版商或中央服务器提出特定交易请求的网上通信。 与此形成对照的是拉动技术,接收者或客户提出传递信息的请求。
你的蜂窝可以不时污染服务器,寻找需要发送的任何数据。 每隔5秒,或者在某些触发点之后,它将打电话给服务器并索取新的数据。
您可使用推进技术: i.e. 有一个不间断的链接,可以向服务器开放,使数据能够同时发送。 轻武器是一种以前使用的产品。 这是数据流利最合理和最有效的解决办法。
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我希望我与四舍五入的累进角进行网上讨论。
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