清除WEBVIEW COOKie

-(void)clearWebViewCookie{
   // UIWebView清除Cookie：
    //清除cookies
    NSHTTPCookie *cookie;
    NSHTTPCookieStorage *storage = [NSHTTPCookieStorage
sharedHTTPCookieStorage];
    for (cookie
in [storage cookies])
    {
        [storage deleteCookie:cookie];
    }
    
   // UIWebView清除缓存：
    
    //清除UIWebView的缓存
    [[NSURLCache
sharedURLCache] removeAllCachedResponses];
    
    NSURLCache * cache = [NSURLCache
sharedURLCache];
    [cache removeAllCachedResponses];
    [cache setDiskCapacity:0];
    [cache setMemoryCapacity:0];
}