UITableView 中的单元格重叠.一个地方有多个单元格 [英] Cells in UITableView overlapping. Many cells in one place

问题描述

我正在尝试使用随机数量的标签制作表格视图.一切正常，直到我尝试滚动它.比许多细胞出现在一个地方.它看起来像这样:

I'm trying to make table view with random numbers of labels in. Everything is working till I try too scroll it. Than many some of cells appear in one place. It looks like this:

模拟画面

为了在 viewDidLoad() 中设置随机行高，我把这个:

To make random row height in viewDidLoad() I put this:

tableView.estimatedRowHeight = 50.0
tableView.rowHeight = UITableViewAutomaticDimension

这里是用随机行数写入随机数标签的代码:

The code going to write randoms number of labels with random number of lines is here:

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {   
    let cell = tableView.dequeueReusableCell(withIdentifier: "HarvestPlan", for: indexPath) as! HarvestPlanCell
    let currentSpecies = harvestPlan[indexPath.row]

    var kindLabels = [UILabel]()
    cell.kindsNamesView.bounds.size.width = 100
    for kind in currentSpecies.kinds {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.numberOfLines = 0
        label.text = kind.fullName
        label.bounds.size.width = 100
        label.sizeToFit()
        label.bounds.size.width = 100
        cell.kindsNamesView.addSubview(label)
        kindLabels.append(label)
    }



    var previous: UILabel!

    for label in kindLabels {
        label.widthAnchor.constraint(equalToConstant: 100).isActive = true
        label.heightAnchor.constraint(equalToConstant: label.bounds.height).isActive = true
        label.leadingAnchor.constraint(equalTo: cell.kindsNamesView.leadingAnchor).isActive = true

        if previous == nil {
            label.topAnchor.constraint(equalTo: cell.kindsNamesView.topAnchor).isActive = true
        }

        if previous != nil {
            label.topAnchor.constraint(equalTo: previous.bottomAnchor).isActive = true
        }

        if label == kindLabels.last {
            label.bottomAnchor.constraint(equalTo: cell.kindsNamesView.bottomAnchor).isActive = true
        }

        previous = label
    }

    return cell

有人知道如何修复它吗?我从一个星期开始就在寻找答案，但我没有找到任何关于它的信息...

Someone have some idea how to repair it? I'm looking for answer since one week and I did't find anything about it...

推荐答案

谢谢@Paulw11，prepareForReuse 正是我要找的.如果有人有类似的问题，答案是下面添加到 UITableViewCell 的代码:

Thank you @Paulw11, prepareForReuse was this what I was looking for. If someone have similar problem, the answer is code below added to UITableViewCell:

override func prepareForReuse() {
    super.prepareForReuse()

    for view in kindsNames.subviews { //take all subviews from your view
        view.removeFromSuperview() //delete it from you view
    }
}

干杯

这篇关于UITableView 中的单元格重叠.一个地方有多个单元格的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！