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answers:

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I have a UIWebView, and I don't want it to store an cookies, so just before the webview is loaded I do:

NSArray* cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
for (NSHTTPCookie *cookie in cookies) {
    [[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];
}

Checking the count of cookies is 0 so they are all deleted. But when I go to stackoverflow it still recognizes my Google Account and logs me in. How does this happen? I though it worked with cookies?