根据内容调整 UILabel 高度？

Question

我有一个自定义 CollectionViewCell class，其中包含一个标签和一个图像。基本上，图像将被限制在单元格的左侧、顶部和右侧。但是，我希望它的高度根据 UILabel 的高度而变化，而 UILabel 的高度又将取决于其中的内容。以下是我的尝试：

导入 UIKit

class 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，使用上面的代码我没有得到我正在寻找的那种行为。我希望 UIlabel 的高度根据其内容而改变。并依次对图片的高度进行相应的调整？

此致，沙迪.

Answer 1

您需要 imageView 的高度限制

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

也不要在方法中添加属性 setupCustomCellElements 使它们成为实例变量，并将它们添加到 init 函数中

最好也将视图添加到

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

并用它构造约束

根据内容调整 UILabel 高度？

Adjusting UILabel height depending on contents?

xcode

constraints

uilabel

swift