我有一个 View,我在其中创建了一个 UILabel,其 numberOfLines 等于零。我希望根据我的标签内容调整标签大小(根据 numberOfLines)。但是,我尝试了很多东西,包括所有 this ,它仍然对我不起作用。我用 Neon AutoLayot 库。
这是我查看的全部内容:
import UIKit
import Neon
class AdditionalDescriptionView: UIView {
lazy var locationLabel = UILabel()
lazy var seasonLabel = UILabel()
lazy var quantityLabel = UILabel()
lazy var durationLabel = UILabel()
lazy var requirementsLabel = UILabel()
var height: CGFloat = 0
var text = NSString()
var size = CGSize()
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setup() {
locationLabel.textAlignment = .left
locationLabel.text = "Локация: Каркаралинск (200км от Караганды)"
locationLabel.textColor = .black
locationLabel.font = UIFont.avenirNextRegular(ofSize: 14)
locationLabel.numberOfLines = 0
seasonLabel.textAlignment = .left
seasonLabel.textColor = .black
seasonLabel.font = UIFont.avenirNextRegular(ofSize: 14)
seasonLabel.text = "Сезоны: все"
quantityLabel.textAlignment = .left
quantityLabel.textColor = .black
quantityLabel.text = "Количество людей: 5-25"
quantityLabel.font = UIFont.avenirNextRegular(ofSize: 14)
durationLabel.textAlignment = .left
durationLabel.textColor = .black
durationLabel.text = "Длительность тура: 3 суток"
durationLabel.font = UIFont.avenirNextRegular(ofSize: 14)
requirementsLabel.textAlignment = .left
requirementsLabel.textColor = .black
requirementsLabel.text = "Требования: удобная обувь, дополнительный груз не более 3кг, минимум 1л питьевой воды. Лицам с кардио- и дыхательными проблемами не рекомендуется участие в туре."
requirementsLabel.font = UIFont.avenirNextRegular(ofSize: 14)
requirementsLabel.numberOfLines = 0
requirementsLabel.lineBreakMode = .byWordWrapping
requirementsLabel.sizeToFit()
self.addSubview(locationLabel)
self.addSubview(seasonLabel)
self.addSubview(quantityLabel)
self.addSubview(durationLabel)
self.addSubview(requirementsLabel)
updateConstraints()
}
override func updateConstraints() {
locationLabel.anchorToEdge(.top, padding: 0, width: self.frame.width, height: AutoHeight)
seasonLabel.align(.underCentered, relativeTo: locationLabel, padding: 0, width: self.frame.width, height: AutoHeight)
seasonLabel.alignAndFillWidth(align: .underCentered, relativeTo: locationLabel, padding: 0, height: AutoHeight)
quantityLabel.alignAndFillWidth(align: .underCentered, relativeTo: seasonLabel, padding: 0, height: AutoHeight)
durationLabel.alignAndFillWidth(align: .underCentered, relativeTo: quantityLabel, padding: 0, height: AutoHeight)
// fix requirementsLabel height
requirementsLabel.alignAndFillWidth(align: .underCentered, relativeTo: durationLabel, padding: 0, height: AutoHeight)
height = locationLabel.frame.height+seasonLabel.frame.height+quantityLabel.frame.height+durationLabel.frame.height+requirementsLabel.frame.height
}
}
使用它来实际添加 View :
self.view.addSubview(additional)
additional.anchorAndFillEdge(.top, xPad: 0, yPad: 0, otherSize: additional.height)
additional.updateConstraints()
最佳答案
我放弃了使用 Neon 解决这个问题的尝试。问题本质上是您试图为您的容器 View 定义一个具体的高度,同时试图将其中的元素彼此锚定及其边距。我最终只使用了使用布局 anchor 的标准自动布局 API。然后,您需要做的就是指定容器的宽度,它的高度将根据其包含的标签的大小自动设置。解决方法如下:
import UIKit
class AdditionalDescriptionView: UIView {
lazy var locationLabel = UILabel()
lazy var seasonLabel = UILabel()
lazy var quantityLabel = UILabel()
lazy var durationLabel = UILabel()
lazy var requirementsLabel = UILabel()
var text = NSString()
var size = CGSize()
override init(frame: CGRect) {
super.init(frame: frame)
setup()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func setup() {
self.translatesAutoresizingMaskIntoConstraints = false
backgroundColor = UIColor.blue
locationLabel.textAlignment = .left
locationLabel.text = "Локация: Каркаралинск (200км от Караганды)"
locationLabel.textColor = .black
locationLabel.font = UIFont.avenirNextRegular(ofSize: 14)
locationLabel.numberOfLines = 0
seasonLabel.textAlignment = .left
seasonLabel.textColor = .black
seasonLabel.font = UIFont.avenirNextRegular(ofSize: 14)
seasonLabel.text = "Сезоны: все"
quantityLabel.textAlignment = .left
quantityLabel.textColor = .black
quantityLabel.text = "Количество людей: 5-25"
quantityLabel.font = UIFont.avenirNextRegular(ofSize: 14)
durationLabel.textAlignment = .left
durationLabel.textColor = .black
durationLabel.text = "Длительность тура: 3 суток"
durationLabel.font = UIFont.avenirNextRegular(ofSize: 14)
requirementsLabel.textAlignment = .left
requirementsLabel.textColor = .black
requirementsLabel.text = "Требования: удобная обувь, дополнительный груз не более 3кг, минимум 1л питьевой воды. Лицам с кардио- и дыхательными проблемами не рекомендуется участие в туре."
requirementsLabel.font = UIFont.avenirNextRegular(ofSize: 14)
requirementsLabel.numberOfLines = 0
requirementsLabel.lineBreakMode = .byWordWrapping
self.addSubview(locationLabel)
locationLabel.translatesAutoresizingMaskIntoConstraints = false
self.addSubview(seasonLabel)
seasonLabel.translatesAutoresizingMaskIntoConstraints = false
self.addSubview(quantityLabel)
quantityLabel.translatesAutoresizingMaskIntoConstraints = false
self.addSubview(durationLabel)
durationLabel.translatesAutoresizingMaskIntoConstraints = false
self.addSubview(requirementsLabel)
requirementsLabel.translatesAutoresizingMaskIntoConstraints = false
locationLabel.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
seasonLabel.topAnchor.constraint(equalTo: locationLabel.bottomAnchor).isActive = true
quantityLabel.topAnchor.constraint(equalTo: seasonLabel.bottomAnchor).isActive = true
durationLabel.topAnchor.constraint(equalTo: quantityLabel.bottomAnchor).isActive = true
requirementsLabel.topAnchor.constraint(equalTo: durationLabel.bottomAnchor).isActive = true
requirementsLabel.bottomAnchor.constraint(equalTo: self.bottomAnchor).isActive = true
locationLabel.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
seasonLabel.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
quantityLabel.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
durationLabel.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
requirementsLabel.widthAnchor.constraint(equalTo: self.widthAnchor).isActive = true
locationLabel.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
seasonLabel.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
quantityLabel.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
durationLabel.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
requirementsLabel.leftAnchor.constraint(equalTo: self.leftAnchor).isActive = true
}
}
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
let additional = AdditionalDescriptionView()
self.view.addSubview(additional)
additional.widthAnchor.constraint(equalTo: self.view.widthAnchor).isActive = true
additional.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
}
}
关于ios - 以编程方式根据行数动态调整 UILabel 的大小,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42320056/