强制 UILabel 不使用连字符

Question

所以我在 UIView 中有一个普通的 UILabel，里面有一些文字。这是一个 3 行标签，具有 .adjustsFontSizeToFitWidth = true

大多数情况下它工作正常，但在某些情况下会出现单词连字符，如下所示：

但在其他字母组合中，它就像我 want/need，它没有连字符，只是调整大小：

我需要的是强制 UILabel 不要 break/hyphen 个单词，而是更喜欢调整大小。换行模式在这里作用不大。有没有一种方法我想念关闭连字符或中断这个词？我也试图找出如何检查单词是否被打断但也找不到它，所以我可以调整行数。

编辑：这里是 playground 代码，可以看看：

import Foundation
import UIKit
import PlaygroundSupport

public class Card: UIView {

var label2: UILabel!

public init(frame: CGRect, withText: String) {
    super.init(frame: frame)
    
    self.backgroundColor = UIColor(red: 0.313, green: 0.89, blue: 0.76, alpha: 1.000)
    
    label2 = UILabel(frame: CGRect(x: bounds.width / 2 - 115, y: (bounds.height/2 - 90), width: 230, height: 180))
    
    label2.textAlignment = .center
    
    label2.text = "stepper; rotory; revolutionizing"
    label2.font = UIFont.boldSystemFont(ofSize: 60)
    label2.textColor = UIColor.white
    
    label2.adjustsFontSizeToFitWidth = true
    label2.translatesAutoresizingMaskIntoConstraints = false
    
    label2.numberOfLines = 0
    
    self.addSubview(label2)
    
    //        label2.topAnchor.constraint(equalTo: self.topAnchor).isActive = true
    //        label2.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -50).isActive = true
    //        label2.leadingAnchor.constraint(equalTo: self.leadingAnchor, constant: 50).isActive = true
    //        label2.bottomAnchor.constraint(equalTo: self.bottomAnchor).isActive = true
    
    
    
}

required public init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}




}


let card = Card(frame: CGRect(x: 10, y: 30, width: 280, height: 200),         withText: "")

let page = PlaygroundPage.current

let view = UIView(frame: CGRect(x: 0, y: 0, width: 300, height: 500))
view.backgroundColor = UIColor.white
view.addSubview(card)


page.liveView = view

Answer 1

有两种方法，第一种是：

yourLabel.text = "stepper;\nrotor;\nrevolutioning;"

只需在任何单词的最后添加 \n...

第二个：创建 3 个带有相关文本的标签，并将其放入垂直 stackView 中...

let yourLabel1 = UILabel()
let yourLabel2 = UILabel()
let yourLabel3 = UILabel()

yourLabel1.text = "stepper;"
yourLabel2.text = "rotor;"
yourLabel3.text = "revolutioning;"

之后创建堆栈视图并添加标签

let stackView = UIStackView(arrangedSubviews: [label1, label2, label3])
stackView.axis = .vertical
stackView.distribution = .fillEqually
... etc etc

设置 stackView 约束，一切顺利

更新您的评论：

yourLabel.text = "stepper; rotor; revolutioning; xxxxxxx; xx; xxxxxxxxxxxxxx; xxxxx; xxxxxxxxxxxx"
yourLabel.font = .systemFont(ofSize: 40, weight: .semibold)
yourLabel.textColor = .black
yourLabel.adjustsFontSizeToFitWidth = true;
yourLabel.minimumScaleFactor = 0.2;
yourLabel.numberOfLines = 0;
yourLabel.translatesAutoresizingMaskIntoConstraints = false
    
view.addSubview(yourLabel)
yourLabel.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
yourLabel.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -50).isActive = true
yourLabel.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 50).isActive = true
yourLabel.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true

具体更新 添加此扩展名：

extension UILabel{

func adjustedFont()->UIFont {
    let attributes: [NSAttributedString.Key: Any] = [.font: font as Any]
    let attributedString = NSAttributedString(string: text ?? "", attributes: attributes)
    let drawingContext = NSStringDrawingContext()
    drawingContext.minimumScaleFactor = minimumScaleFactor

    attributedString.boundingRect(with: bounds.integral.size, options: .usesLineFragmentOrigin, context: drawingContext)

    let fontSize = font.pointSize * drawingContext.actualScaleFactor

    return font.withSize(fontSize)
}

func fitLabelWords(){
    layoutIfNeeded()
    let scaledFont = self.adjustedFont()
    let currentFont = scaledFont
    if let txt = text,
        let maxString = txt.components(separatedBy: " ").max(by: {.count > [=14=].count})?.replacingOccurrences(of: "\n", with: ""){
        let maxFontSize: CGFloat = currentFont.pointSize
        let minFontSize: CGFloat = 5.0

        var maxS = maxFontSize
        var minS = minFontSize
        let height = currentFont.lineHeight
        let constraintSize = CGSize(width: .greatestFiniteMagnitude, height: height)
        var sizedFont = currentFont
        while(minS <= maxS){
            let currentSize = (minS + maxS) / CGFloat(2)
            sizedFont = currentFont.withSize( CGFloat(currentSize) )

            let text = NSMutableAttributedString(string:maxString, attributes:[NSAttributedString.Key.font:sizedFont])

            let textRect = text.boundingRect(with: constraintSize, options: [.usesLineFragmentOrigin], context: nil).integral
            let labelSize = textRect.width

            //1 is a fudge factor
            if labelSize == ceil(self.bounds.width - 1){
                break
            }else if labelSize > ceil(self.bounds.width - 1){
                maxS = currentSize - 0.1
            }else{
                minS = currentSize + 0.1
            }
        }

        if sizedFont.pointSize < currentFont.pointSize{
            self.font = sizedFont
        }
    }
 }
}

像这样设置标签：

label2 = UILabel(frame: CGRect(x: view.bounds.width / 2 - 115, y: (view.bounds.height/2 - 90), width: 230, height: 180))
    
label2.textAlignment = .center
label2.text = "stepper; rotory; revolutionizing; skfghjkadsghasdg;"
label2.numberOfLines = 0
label2.font = UIFont.boldSystemFont(ofSize: 60)
label2.textColor = .white
label2.adjustsFontSizeToFitWidth = true
label2.minimumScaleFactor = 0.3
label2.fitLabelWords()
    
 view.addSubview(label2)

强制 UILabel 不使用连字符

Force UILabel to not hyphen words

hyphen

uilabel

ios

swift