var dataArray = NSMutableArray() // dataArray is has a data from Database
var EnabledID = Int()

EnabledID = UserDefaults.standard.integer(forKey: "EnabledID")

if EnabledID == 0 {

    EnabledID = 1
    UserDefaults.standard.set(1, forKey: "EnabledID")

} else {
    if EnabledID < dataArray.count {
        let index = NSIndexPath(item: EnabledID, section: 0)
        self.myCollectionView.scrollToItem(at: index as IndexPath, at: .centeredVertically, animated: true)
    }
}

var dataArray = NSMutableArray() // dataArray is has a data from Database
var EnabledID = Int()
EnabledID = UserDefaults.standard.integer(forKey: "EnabledID")

if EnabledID == 0 {

    EnabledID = 1
    UserDefaults.standard.set(1, forKey: "EnabledID")

} else {
If EnabledID < dataArray.count{

        let indexPath = IndexPath(item: EnabledID, section: 0)

        if let cell  = self.myCollectionView.cellForItem(at: indexPath) as? CollectionViewCell {

        } else {
            print("not able to cast collection view cell class to `CollectionViewCell` ")
        }
    }
}