【发布时间】:2019-05-04 19:31:22
【问题描述】:
我有一个自定义 CollectionViewCell 类,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
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,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。并反过来对图片的高度进行相应的调整?
问候, 沙迪。
【问题讨论】:
-
你得到了什么?
-
UILabel 的高度没有改变,因此图像的高度也没有改变。
标签: swift xcode uilabel constraints