如何解决当我更改字符串属性时,kCTRubyAnnotationAttributeName 不显示 ruby 文本
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。
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