我试图将itemLabel UILabel设置为多行并进行自动换行,但是我无法弄清楚这里出了什么问题。我有numberOfLines = 0和.byWordWrapping设置。我确定这只是我弄乱的简单代码行,但找不到。
import UIKit
import Foundation
protocol ListItemCellDelegate {
func setChecked(cell: ListItemCell)
}
class ListItemCell: UITableViewCell {
var delegate: ListItemCellDelegate?
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 func prepareForReuse() {
super.prepareForReuse()
self.delegate = nil
}
let cellView: UIView = {
let view = UIView()
view.backgroundColor = UIColor.white
view.setCellShadow()
return view
}()
let checkButton: UIButton = {
let button = UIButton(type: .custom)
button.setImage(UIImage(named: "UnChecked"), for: .normal)
button.setImage(UIImage(named: "Checked"), for: .selected)
button.frame = CGRect(x: 0, y: 0, width: 50, height: 50)
return button
}()
let priorityButton: UIButton = {
let button = UIButton(type: .custom)
button.frame = CGRect(x: 0, y: 0, width: 40, height: 40)
button.setTitleColor(.black, for: .normal)
button.backgroundColor = UIColor.white
button.layer.borderWidth = 2
button.layer.borderColor = UIColor.black.cgColor
button.titleLabel?.font = UIFont.init(name: "Avenir Next", size: 24)
return button
}()
let itemLabel: UILabel = {
let label = UILabel()
label.textColor = UIColor.black
label.font = UIFont.init(name: "Avenir Next", size: 16)
return label
}()
override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setupCell()
checkButton.addTarget(self, action: #selector(setChecked), for: .touchUpInside)
itemLabel.translatesAutoresizingMaskIntoConstraints = false
itemLabel.numberOfLines = 0
itemLabel.lineBreakMode = .byWordWrapping
}
func setupCell() {
addSubview(cellView)
cellView.addSubview(checkButton)
cellView.addSubview(priorityButton)
cellView.addSubview(itemLabel)
cellView.setAnchor(top: topAnchor, left: leftAnchor, bottom: bottomAnchor, right: rightAnchor, paddingTop: 4, paddingLeft: 8, paddingBottom: 4, paddingRight: 8)
checkButton.setAnchor(top: nil, left: cellView.leftAnchor, bottom: nil, right: nil, paddingTop: 0, paddingLeft: 8, paddingBottom: 0, paddingRight: 0, width: 50, height: 50)
checkButton.centerYAnchor.constraint(equalTo: cellView.centerYAnchor).isActive = true
priorityButton.setAnchor(top: nil, left: checkButton.rightAnchor, bottom: nil, right: nil, paddingTop: 0, paddingLeft: 8, paddingBottom: 0, paddingRight: 0, width: 40, height: 40)
priorityButton.centerYAnchor.constraint(equalTo: checkButton.centerYAnchor).isActive = true
itemLabel.setAnchor(top: nil, left: priorityButton.rightAnchor, bottom: nil, right: rightAnchor, paddingTop: 0, paddingLeft: 20, paddingBottom: 0, paddingRight: 20)
itemLabel.centerYAnchor.constraint(equalTo: priorityButton.centerYAnchor).isActive = true
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
@objc private func setChecked() {
self.delegate?.setChecked(cell: self)
}
}
我希望UILabel可以包装文本并占用所需的空间,以使整个标签文本适合单元格。现在,它不会显示整个消息,只会显示大小允许的大小。但是,我希望它根据字符串的长度来调整大小。我在Storyboard中很容易做到这一点,但我正在尝试使其以编程方式工作。
答案 0 :(得分:1)
我之前做过,就像在UITableView()中那样,存在一个字符串数组,并且字符串的长度不固定,它可以是3行或更多行。
为此,我将UILabel()的约束(例如top,bottom,lead,所有约束拖到0)赋予了
。在UITableView()中,有一个称为的方法:
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat
{
return UITableViewAutomaticDimension
}
尝试一下,我想它一定会对您有帮助。
答案 1 :(得分:0)
在我的情况下,部分解决方案是Varsha Shivhare建议的,另一种是将heightAnchor约束设置为> = 60,这是我现在正在使用的约束。谢谢!