Xamarin Forms - iOS - storing cookies between application runs

Question

I am trying to implement a user logon using Xamarin for Android and iOS. I am using WebView for displaying the back end user logon page. When logon is successful session cookies are saved in the cookie storage which can be used for automatic log on up to the point when tokens are expired.

For Android everything is working fine, when I close the app and start it again it automatically logs me in.

For iOS situation is different and I am redirected to the logon page. This means the cookies are deleted between two runs of the application.

Any suggestions how to setup iOS so it keeps the cookies between multiple runs of the app?

Many thanks for help in advance.

Answer 1

Hi Palkos-6616,

Welcome to our Microsoft Q&A platform!

Actually, in my test, cookies will be saved without any other operations.

To save the cookies, try to set "AcceptPolicy" to "NSHttpCookieAcceptPolicy.Always".

NSHttpCookieStorage.SharedStorage.AcceptPolicy = NSHttpCookieAcceptPolicy.Always  

Add the following code to renderer's "OnElementChanged". Here is the reference link.

// Set cookies here  
var cookieUrl = new Uri(@"https://www.microsoft.com");  
var cookieJar = NSHttpCookieStorage.SharedStorage;  
cookieJar.AcceptPolicy = NSHttpCookieAcceptPolicy.Always;  
foreach (var aCookie in cookieJar.Cookies)  
{  
    cookieJar.DeleteCookie(aCookie);  
}  
  
var jCookies = UserInfo.CookieContainer.GetCookies(cookieUrl);  
IList<NSHttpCookie> eCookies =  
    (from object jCookie in jCookies  
        where jCookie != null  
        select (Cookie)jCookie  
        into netCookie  
        select new NSHttpCookie(netCookie)).ToList();  
cookieJar.SetCookies(eCookies.ToArray(), cookieUrl, cookieUrl);  

And you can call HttpCookieStore.GetAllCookies to get the cookies.

Regards,
Kyle

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