Easily retrieve the indexPath of cell's subview in UITableView. Great for button taps and TextFields

UITableViewAndUICollectionView+IndexPathForSubview.swift

extension UITableView {
    /**
    Returns an index path identifying the row and section
    of the cell containing the provided view
    
    :param: cellSubview A subview of any given UITableViewCell in the table. Typically this is either a `UIButton` or `UITextField`
    */
    func indexPathForCellWithSubview(cellSubview: UIView) -> NSIndexPath? {
        let cellFrame = convertRect(cellSubview.bounds, fromView: cellSubview)
        let cellCenter = CGPoint(x: CGRectGetMidX(cellFrame), y: CGRectGetMidY(cellFrame))
        return indexPathForRowAtPoint(cellCenter)
    }
}

extension UICollectionView {
    /**
    Returns an index path identifying the row and section
    of the cell containing the provided view
    
    :param: cellSubview A subview of any given UICollectionViewCell in the collectionView. Typically this is either a `UIButton` or `UITextField`
    */
    func indexPathForCellWithSubview(cellSubview: UIView) -> NSIndexPath? {
        let cellFrame = convertRect(cellSubview.bounds, fromView: cellSubview)
        let cellCenter = CGPoint(x: CGRectGetMidX(cellFrame), y: CGRectGetMidY(cellFrame))
        return indexPathForItemAtPoint(cellCenter)
    }
}

can easily be used like: tableView.indexPathForCellWithSubview(cellSubview)