self.tableView.contentInset = UIEdgeInsetsMake(0, 10, 0, 10);

import UIKit

class MyTableViewCell: UITableViewCell {

    override func layoutSubviews() {
        super.layoutSubviews()
        contentView.frame = UIEdgeInsetsInsetRect(contentView.frame, UIEdgeInsetsMake(0, 16, 0, 16))
    }
}