swift - willDisplayCell 第一行在 Swift 中不起作用

Question

我想为我的自定义单元格制作自定义角圆角背景，它与下面的代码一起使用，但第一行不受影响，我应该向上滚动它以使其具有背景

 func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
        if indexPath.row != 0 {
            cell.contentView.backgroundColor = UIColor.clearColor()
            var whiteRoundedCornerView: UIView = UIView(frame: CGRectMake(10, 10, 365, 250))
            whiteRoundedCornerView.backgroundColor = UIColor.lightGrayColor()
            whiteRoundedCornerView.layer.masksToBounds = false
            whiteRoundedCornerView.layer.cornerRadius = 20
            whiteRoundedCornerView.layer.shadowOffset = CGSizeMake(-0, -1)
            whiteRoundedCornerView.layer.shadowOpacity = 0.1

            cell.contentView.addSubview(whiteRoundedCornerView)
            cell.contentView.sendSubviewToBack(whiteRoundedCornerView)
        }


    }

Answer 1

代码中的问题是 if 语句。当 indexPath.row 为 0(即第一行)时，您的配置代码不会执行。要解决此问题，只需从代码中删除 if 语句即可。它应该看起来像这样:

func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
    cell.contentView.backgroundColor = UIColor.clearColor()
    var whiteRoundedCornerView: UIView = UIView(frame: CGRectMake(10, 10, 365, 250))
    whiteRoundedCornerView.backgroundColor = UIColor.lightGrayColor()
    whiteRoundedCornerView.layer.masksToBounds = false
    whiteRoundedCornerView.layer.cornerRadius = 20
    whiteRoundedCornerView.layer.shadowOffset = CGSizeMake(-0, -1)
    whiteRoundedCornerView.layer.shadowOpacity = 0.1

    cell.contentView.addSubview(whiteRoundedCornerView)
    cell.contentView.sendSubviewToBack(whiteRoundedCornerView)
}