ios - 在 UITableView 中使用编程自定义 UILabel
问题描述
我正在尝试使用UITableViewCell
我以编程方式在UITableView
.
UITableViewCell
班级:
class PopulatedCellStyleTableViewCell: UITableViewCell {
private let userDisplayName: UILabel = {
let lbl = UILabel()
lbl.font = UIFont(name: "Baskerville-Bold", size: 16)
lbl.textColor = .purple
lbl.textAlignment = .left
lbl.backgroundColor = UIColor(displayP3Red: 1, green: 1, blue: 1, alpha: 0.5)
return lbl
}()
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
addSubview(userDisplayName)
//from a UIKit extension that allows me to easily add anchors
userDisplayName.anchor(top: self.topAnchor, left: self.leftAnchor, bottom: self.bottomAnchor, right: self.rightAnchor, paddingTop: 5, paddingLeft: 0, paddingBottom: 5, paddingRight: 0, width: self.frame.width, height: self.frame.height, enableInsets: false)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
和UITableViewController
班级:
class LoveListController: UITableViewController {
var loveList: [String]!
let populatedCell = "populatedCell"
override func viewDidLoad() {
super.viewDidLoad()
self.tableView.register(PopulatedCellStyleTableViewCell.self, forCellReuseIdentifier: populatedCell)
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return loveList.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: populatedCell, for: indexPath)
// Configure the cell...
cell.textLabel?.text = loveList[indexPath.row]
return cell
}
}
在检查调试视图层次结构时,标签加载,但实际文本呈现在 aUITableViewCellContentView
而不是 myUILabel
中,我不知道为什么。
如果这很容易解决或之前已经讨论过,请指出正确的方向和/或教我如何自己发现解决方案!
解决方案
您需要投射单元格并使用您的自定义userDisplayName
而不是textLabel
let cell = tableView.dequeueReusableCell(withIdentifier: populatedCell, for: indexPath) as! PopulatedCellStyleTableViewCell
cell.userDisplayName.text = loveList[indexPath.row]
另外最好添加标签contentView
并用它创建约束
self.contentView.addSubview(userDisplayName)
self.userDisplayName.anchor(top: self.contentView.topAnchor .....