NSURLCache *cache = [NSURLCache sharedURLCache];

    cache.memoryCapacity = 2 * 1024 * 1024;

    cache.diskCapacity = 20 * 1024 *1024;

    NSCachedURLResponse *response = [cache cachedResponseForRequest:request];

    

    if (response) {

//        NSLog(@"data:%@", response.data);

        id cacheResult = [NSJSONSerialization JSONObjectWithData:response.data options:NSJSONReadingMutableContainers error:nil];

        NSLog(@"cacheResult: %@", cacheResult);

    }