Question

我有一个数组类型的字符串数组，我将它打印到for tableView for for循环。我知道它在cellForRowAt indexPath内的一个不好的练习循环：function但我没有任何解决方案。我的问题是每次我在模拟器上移动tableview时，我会在现有的子视图上插入更多的子视图。它会覆盖较旧的子视图并阻止我使用

for view in cell.subviews {
        view.removeFromSuperview()
}

但是我用旧的细胞标签删除了我的细胞分离器。如何只移除细胞数据而不是我的分隔符。

func tableView(_ tableView: UITableView, cellForRowAt indexPath:IndexPath) -> UITableViewCell {

    var cell:UITableViewCell = tableView.dequeueReusableCell(withIdentifier: "cell")! as UITableViewCell
    //print(cell.subviews)
    for view in cell.subviews {
        view.removeFromSuperview()
    }


    for i in 0..<globalHeaderStructArray.count{
        var newLabel = UILabel(frame: CGRect(x:xCoordination, y:10, width:Double(globalHeaderStructArray[i].width)!, height:30.0))
        newLabel.font = UIFont(name: "Avenir", size: 17.0)
        newLabel.textColor = UIColor.darkGray
        newLabel.text = "\(globalDataArray[indexPath.row][i])"

        var scrollview = UIScrollView(frame: cell.bounds)
        scrollview.contentSize = CGSize(width:cell.bounds.width * 5, height:cell.bounds.height) // will be 5 times as wide as the cell
        scrollview.isPagingEnabled = true

        cell.contentView.addSubview(scrollview)
        cell.addSubview(newLabel)
        xCoordination += Double(globalHeaderStructArray[i].width)!
    }
    xCoordination = 0.0

    return cell

}

Answer 1

您可以将tag设置为您的标签和scrollView对象，然后像这样检查内部循环。

for view in cell.subviews {
    if view.tag == 101 || view tag == 102 {
        view.removeFromSuperview() 
    }
}


for i in 0..<globalHeaderStructArray.count{
    var newLabel = UILabel(frame: CGRect(x:xCoordination, y:10, width:Double(globalHeaderStructArray[i].width)!, height:30.0))
    newLabel.font = UIFont(name: "Avenir", size: 17.0)
    newLabel.textColor = UIColor.darkGray
    newLabel.text = "\(globalDataArray[indexPath.row][i])"
    newLabel.tag = 101

    var scrollview = UIScrollView(frame: cell.bounds)
    scrollview.contentSize = CGSize(width:cell.bounds.width * 5, height:cell.bounds.height) // will be 5 times as wide as the cell
    scrollview.isPagingEnabled = true
    scrollview.tag = 102

    cell.contentView.addSubview(scrollview)
    cell.addSubview(newLabel)
    xCoordination += Double(globalHeaderStructArray[i].width)!
}

提示：如果您使用界面构建器来设计单元格而不是在运行时添加UI元素，则会很糟糕。

当我删除单元格子视图时，Swift 3 UITableView单元格分隔符消失

1 个答案: