UIImageView setImageWithURL 에 대한 clear cache

- (void)clearImageCache

{

    [[NSURLCache sharedURLCache] removeAllCachedResponses];

    [[AFImageDownloader defaultURLCache] removeAllCachedResponses];

    [[[AFImageDownloader defaultInstance] imageCache] removeAllImages];

    AFAutoPurgingImageCache *imageCache = [[AFAutoPurgingImageCache alloc] init];

    [imageCache removeAllImages];

}