Question

我尝试为我的应用添加问答部分，并且tableview单元必须根据文本高度进行扩展，单元高度必须随此文本而变化。在这一点上，我做了一些事情来解决问题，这些问题是numberOfline = 0并且UITableView.automaticDimension代码无法解决我的问题。这是我的项目代码：

问题是单元格高度没有改变，此代码只需在问题下写标签，并在下一个问题下写更长的答案即可。意味着像元高度没有变化。

let soruLabel: UILabel = {
    let sorulabel = UILabel()
    sorulabel.textColor = .darkGray
    sorulabel.numberOfLines = 0
    sorulabel.font = UIFont.boldSystemFont(ofSize: 17)
    return sorulabel
}()

let cevapLabel: UILabel = {
    let cevaplabel = UILabel()
    cevaplabel.textColor = .black
    cevaplabel.numberOfLines = 0
    cevaplabel.font = UIFont(name: "HelveticaNeue", size: 18)
    return cevaplabel
}()

override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
    super.init(style: style, reuseIdentifier: reuseIdentifier)
    setup()
}

func set(content: expandingTableCellForsss) {
    self.soruLabel.text = content.soru
    self.cevapLabel.text = content.expanded ? content.cevap : ""
}

func setup() {
    backgroundColor = UIColor.init(red: 245, green: 245, blue: 245, alpha: 1)


    addSubview(soruLabel)
    addSubview(cevapLabel)


    soruLabel.translatesAutoresizingMaskIntoConstraints = false
    soruLabel.topAnchor.constraint(equalTo: topAnchor).isActive = true
    soruLabel.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
    soruLabel.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = false
    soruLabel.rightAnchor.constraint(equalTo: rightAnchor).isActive = true

    cevapLabel.translatesAutoresizingMaskIntoConstraints = false
    cevapLabel.topAnchor.constraint(equalTo: soruLabel.bottomAnchor).isActive = true
    cevapLabel.leftAnchor.constraint(equalTo: leftAnchor).isActive = true
    cevapLabel.bottomAnchor.constraint(equalTo: soruLabel.bottomAnchor).isActive = false
    cevapLabel.rightAnchor.constraint(equalTo: rightAnchor).isActive = true




}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

}

Answer 1

请检查： UITableViewCell auto height based on amount of UILabel text，

Using Auto Layout in UITableView for dynamic cell layouts & variable row heights

要使用动态像元高度： 1）给出viewDidLoad中单元格的最小行高

tableView.estimatedRowHeight = 300

2）在viewDidLoad中将tableview的rowHeight属性设置为自动

tableView.rowHeight = UITableViewAutomaticDimension

3）在情节提要中选择numberOfLines = 0

4）如果您已为StoryBoard中的单元格提供了自定义高度，请确保其等于估计的行高。

Answer 2

需要设置底部锚点：

cevapLabel.bottomAnchor.constraint(equalTo: bottomAnchor).isActive = true

根据标签文本动态更改像元高度

2 个答案: