override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated..
    removeCacheMemmory()
}

func removeCacheMemmory(){
    SDWebImageManager.sharedManager().imageCache.clearMemory()
    SDWebImageManager.sharedManager().imageCache.clearDisk()
    SDImageCache.sharedImageCache().cleanDisk()
    SDImageCache.sharedImageCache().clearMemory()
    NSURLCache.sharedURLCache().removeAllCachedResponses()
}