让tableViewCell动画显示(swift)

func animateTable() {
self . tableView . reloadData ()
let cells = tableView . visibleCells
let tableHeight: CGFloat = bounds . size . height

for i in cells {
let cell: UITableViewCell = i as UITableViewCell
cell. transform = CGAffineTransformMakeTranslation ( 0 ,tableHeight)
}

var index = 0

for a UITableViewCell = a UITableViewCell
UIView . animateWithDuration ( 1.5 ,delay: 0.05 * Double (index),usingSpringWithdamping: 0.8 ,initialSpringVeLocity: 0 );
},completion: nil )
index += 1
}

}