iOS-清除webview緩存

//清除cookie

        NSHTTPCookie *cookie;

        NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];

        for (cookie in [storage cookies]){

            [storage deleteCookie:cookie];

        }

            

         //清除webview緩存

         [[NSURLCache sharedURLCache] removeAllCachedResponses];

         NSURLCache * cache = [NSURLCache sharedURLCache];

         [cache removeAllCachedResponses];

         [cache setDiskCapacity:0];

         [cache setMemoryCapacity:0];