WebView 删除 cookies

NSHTTPCookie *cookie;

NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];

NSArray *cookieAry = [cookieJar cookiesForURL: [NSURL URLWithString: @"http://api.m.taobao.com"]];

for (cookie in cookieAry) {

[cookieJar deleteCookie: cookie];

}