if let videoTabData = data.data {
    if self.offSet == 0 { //use for refreshData, first call
        self.dataArray = videoTabData as [AnyObject]
    } else {
        self.dataArray += videoTabData as [AnyObject]
    }
    self.updateShouldShowFooter(with: videoTabData.count)
    self.collectionView?.reloadData()
    self.offSet = self.dataArray.count
}