如何维护iPhone的会话 [英] How to maintain Session for iphone

问题描述

在我的Iphone应用程序中，用户使用用户名和密码登录.用户登录后，他可以通过API访问每个属性和功能.但是我想保持一个会话.也就是说，如果用户在应用程序中什么也不做，则在30分钟后，会话应终止，并且必须要求用户使用其用户名和密码登录.

In my Iphone App, User logins with Username and password. At after user logged in, He can access every attribute, features through APIs. But i want to maintain a session. That is, If user doing nothing in app, After getting 30 mins, Session should expire and user must be asked to login with his Username and password.

推荐答案

我目前正在研究完全相同的东西.

I am currently working on something exactly the same.

我为会话有效性执行以下方案:

I do the following scenario for the session validity:

1. 如果 Session令牌似乎无效，则在第一个传入请求中，我尝试在后台静默再次重新生成会话密钥.

1. By the first incoming request if the Session Token appeared to be invalid I try to re-generate the session key again silently in the background.

如果由于某些原因(例如，用户从其他地方更改了密码)，步骤1无法正常工作，我将用户再次重定向至登录页面，并且出现类似您的会话密钥已过期，请登录"的提示再次进入".

If procedure #1 did not work for some reasons such as the user changed his password from somewhere else I redirect the user to the log in page again and I alert something like "Your session key has been expired please log in again".

要获得更多信息，我将会话密钥存储在 NSUserDefaults 中:

To get more into this I store the Session key in the NSUserDefaults:

 // Saving the Key
 [[NSUserDefaults standardUserDefaults] setValue:@"ABCDEFGHIJK" forKey:@"SessionKey"];

 // Reading the Key
 [[NSUserDefaults standardUserDefaults] stringForKey:@"SessionKey"];

希望这会有所帮助.

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