如何仅在UITableView的底部添加阴影？(How to add shadow only at the bottom of section of UITableView?)

 我有一个分段的UITableView ，它有一个高度为10的头部，它有backgroundColor作为clearColor只是为了显示更分离的部分。 现在我只需要在每个部分的底部添加阴影。 我已经尝试向viewForHeaderInSection方法添加阴影，但结果非常糟糕。 任何提示实现这一目标？ 
 
func tableView(tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
    let shadowView = UIView()

    shadowView.layer.shadowColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.5).CGColor
    shadowView.layer.shadowOffset = CGSizeMake(0.0, 2.0)
    shadowView.layer.shadowOpacity = 1.0
    shadowView.layer.shadowRadius = 0.0
    shadowView.layer.masksToBounds = false

    return shadowView
}

func tableView(tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
    return 2
}

I have a sectioned UITableView which has a header of height 10 and it has backgroundColor as clearColor just to show the sections more separated. Now I need to add a shadow only at the bottom of each section. I've tried adding shadow to the viewForHeaderInSection method, but the result is very bad. Any tips for achieving this?
 
func tableView(tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
    let shadowView = UIView()

    shadowView.layer.shadowColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.5).CGColor
    shadowView.layer.shadowOffset = CGSizeMake(0.0, 2.0)
    shadowView.layer.shadowOpacity = 1.0
    shadowView.layer.shadowRadius = 0.0
    shadowView.layer.masksToBounds = false

    return shadowView
}

func tableView(tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
    return 2
}

原文：https://stackoverflow.com/questions/40026892