How do pass forms-based authentication form iphone app to website?

I am working on creating an iphone application which logins to we website and retrieves a table, and displays the content within the app. To view the table a Login is required. It seems the site is using Form-Baseds Authentication. WebSite's Login Screen

So How do开发者_如何学Go I pass the login ID and pass from xcode to the to the site and retain the information so the user only needs to login once.

to remember the login credentials, the easiest way is to put them into a NSDictionary and write that to the application bundle, then read it later, when needed. Remember to give the users a chance to change their login credentials later on and at least think about encrypting the data.

As to the form-based login, the way to go would be to create a NSURLRequest to the login forms URL, if it is GET-based, simply do it like url.somewhere/form?user=foo&pass=bar, if it is POST-based, alter the created request and include the information needed in the POST-field.