Criando animação nas células da UITableView - iOS

.swift

override func viewWillAppear(animated: Bool) {
    animateTable()
}
    
func animateTable() {
    tableView.reloadData()
        
    let cells = tableView.visibleCells()
    let tableHeight: CGFloat = tableView.bounds.size.height
        
    for i in cells {
        let cell: UITableViewCell = i as UITableViewCell
        cell.transform = CGAffineTransformMakeTranslation(0, tableHeight)
    }
        
    var index = 0
        
    for a in cells {
        let cell: UITableViewCell = a as UITableViewCell
        UIView.animateWithDuration(1.5, delay: 0.05 * Double(index), usingSpringWithDamping: 0.8, initialSpringVelocity: 0, options: nil, animations: {
            cell.transform = CGAffineTransformMakeTranslation(0, 0);
        }, completion: nil)
            
        index += 1
    }
}