当我更改字符串属性时，kCTRubyAnnotationAttributeName 不显示 ruby​​ 文本

问题描述

我正在尝试使用名为 ZSWTappableLabel 的自定义 UILabel 在 ruby​​ 文本中显示日语假名。但是每当我调用任何自定义设置（例如设置背景颜色或启用可点击区域）时，Ruby 文本就会消失。

import UIKit
import CoreText
import ZSWTappableLabel

class ViewController: UIViewController,ZSWTappableLabelTapDelegate,ZSWTappableLabelLongPressDelegate {

  @IBOutlet var textLabel: ZSWTappableLabel!
  
  override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    textLabel.tapDelegate = self
    textLabel.longPressDelegate = self
    
    let word = "食べ物"
    let ruby = "たべもの"
    
    let attributes: [NSAttributedString.Key: Any] = [
      .tappableRegion: true,//.tappableHighlightedBackgroundColor: UIColor.lightGray,//.tappableHighlightedForegroundColor: UIColor.white,//kCTRubyAnnotationAttributeName as NSAttributedString.Key: annotation,.foregroundColor: UIColor.blue,//.font: UIFont.systemFont(ofSize: 32)
      //.underlinestyle: NSUnderlinestyle.single.rawValue
    ]
    
    //textLabel.attributedText = NSAttributedString(string: word,attributes: attributes)
    
    var text = furigana(main: word,furigana: ruby)
    text.addAttributes(attributes,range: NSMakeRange(0,text.length))
    
    textLabel.attributedText = text
    
  }

  func tappableLabel(_ tappableLabel: ZSWTappableLabel,tappedAt idx: Int,withAttributes attributes: [NSAttributedString.Key : Any] = [:]) {
    print("tapped at: ",idx)
  
  }
  
  func tappableLabel(_ tappableLabel: ZSWTappableLabel,longpressedAt idx: Int,withAttributes attributes: [NSAttributedString.Key : Any]) {
    print("long-pressed at: ",idx)
  }
  
  func furigana(main: String,furigana: String) -> NSMutableAttributedString {
    
    var ruby = furigana
    var unmanage = Unmanaged.passRetained(ruby as CFString)
    defer { unmanage.release() }
    var text: [Unmanaged<CFString>?] = [unmanage,.none,.none]
    
    let rubyAttribute: [AnyHashable: Any] = [
        kCTRubyAnnotationSizefactorAttributeName: 0.5,kCTForegroundColorAttributeName: UIColor.black
    ]
    
    let annotation = CTRubyAnnotationCreateWithAttributes(.auto,.auto,.before,ruby as CFString,rubyAttribute as CFDictionary)
    
    let attributed = NSMutableAttributedString(
      string: main,attributes: [kCTRubyAnnotationAttributeName as NSAttributedString.Key: annotation,])
    
    let paragraphStyle = NSMutableParagraphStyle()
    paragraphStyle.lineHeightMultiple = 1.0
    paragraphStyle.linespacing = 12
    
    attributed.addAttribute(NSAttributedString.Key.paragraphStyle,value: paragraphStyle,attributed.length))
    attributed.addAttributes([NSAttributedString.Key.font: UIFont.systemFont(ofSize: 32)],(attributed.length)))
    
    
    return attributed
  }
}

您可以尝试对行进行注释和取消注释，例如 .tappableRegion: true 以查看会发生什么。

解决方法

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