根据内容来调整Uilabel高度

Question

我有一个自定义集合视频类，其中包含标签和图像。基本上，图像将被约束在单元格的左侧，顶部和右侧。但是，我希望它的高度取决于Uilabel的高度，这反过来将取决于其中的内容。以下是我的尝试：

导入Uikit

类CustomCollectionViewCell：UicollectionViewCell {

override init(frame: CGRect) {
    super.init(frame: frame)
    backgroundColor = .yellow
}
required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}
convenience init(cellTextTile text: String) {
    self.init()
}
func setupCustomCellElements(cellImageName image: String, cellTitleTextColour textColour: UIColor, cellTitleTextSize textSize: CGFloat, cellTitleFontType fontType: String, cellTitle title: String) {
    let cellImage: UIImageView = {
        let imageView = UIImageView()
        imageView.backgroundColor = .clear
        imageView.image = UIImage(named: image)
        imageView.translatesAutoresizingMaskIntoConstraints = false
        return imageView
    }()
    let cellTitle: UILabel = {
        let label = UILabel()
        label.textColor = textColour
        label.font = UIFont(name: fontType, size: textSize)
        label.text = title
        label.textAlignment = .center
        label.frame.size = CGSize(width: self.frame.size.width, height: CGFloat.greatestFiniteMagnitude)
        label.numberOfLines = 0
        label.lineBreakMode = NSLineBreakMode.byWordWrapping
        label.sizeToFit()
        label.translatesAutoresizingMaskIntoConstraints = false
        return label
    }()
    addSubview(cellImage)
    addSubview(cellTitle)
    NSLayoutConstraint.activate([
        cellTitle.bottomAnchor.constraint(equalTo: bottomAnchor),
        cellTitle.leftAnchor.constraint(equalTo: leftAnchor),
        cellTitle.rightAnchor.constraint(equalTo: rightAnchor),
        cellImage.bottomAnchor.constraint(equalTo: cellTitle.topAnchor),
        cellImage.topAnchor.constraint(equalTo: topAnchor),
        cellImage.leftAnchor.constraint(equalTo: leftAnchor),
        cellImage.rightAnchor.constraint(equalTo: rightAnchor)
        ])
}

}

但是，对于上述代码，我没有得到我想要的那种行为。我希望Uilabel的高度根据其内容更改。然后，图像的高度相应调整？

问候，shadi。

Answer 1

您需要对ImageView的高度约束

cellImage.heightAnchor.constraint(equalToConstant: 50), // or any value 

也不要添加方法中的属性setupCustomCellElements使其成为实例变量，而是在init函数中添加它们

---

最好还将视图添加到

contentView.addSubview(cellImage) 
contentView.addSubview(cellTitle)

并用它约束约束