UIWebview 词标识符

Question

我正在努力转换下面的代码以获取 UIWebView 中平移的单词。它在 UITextView 中效果很好。但是，我在 UIWebView 中找不到任何可以做到的东西。我知道它一定存在，因为我可以在加载到 UIWebView 的网站中长按一个单词并选择它。我想以编程方式返回这个词。最终，我想在 ePub 或 PDF 中执行相同的操作。任何帮助表示赞赏。

@IBOutlet weak var textView: UITextView!

override func viewDidLoad() {
    super.viewDidLoad()
    let textInView = "Baa baa black sheep, have you any wool? Yes sir, yes sir, three bags full! One for the master, one for the dame, And one for the little boy who lives down the lane."
    textView.text = textInView
    textView.isEditable=false
    textView.isSelectable=false
    let panGesture = UIPanGestureRecognizer(target: self, action: #selector(self.panResponse(sender:)))
    panGesture.minimumNumberOfTouches = 1
    textView.addGestureRecognizer(panGesture)
}
    func panResponse(sender: UIPanGestureRecognizer) {
        let location: CGPoint = sender.location(in: textView)
        let tapPosition: UITextPosition? = textView.closestPosition(to: location)
        if tapPosition != nil {
            let textRange: UITextRange? = textView.tokenizer.rangeEnclosingPosition(tapPosition!, with: UITextGranularity.word, inDirection: 1)
            if textRange != nil {
 //Do Something
 }

Answer 1

你可以添加 UIMenuViewController 并覆盖复制选项。我做了一个带有 UIWebview 扩展的小演示，这是我的全部代码

extension UIWebView {
  override open var canBecomeFirstResponder: Bool {
    return true 
  }

  override open func copy(_ sender: Any?) {
    let board = UIPasteboard.general
    let selectedString = self.stringByEvaluatingJavaScript(from: "window.getSelection().toString()")
    board.string = selectedString
    let menu = UIMenuController.shared
    menu.setMenuVisible(false, animated: true)
  }

  override open func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
    if action == #selector(UIResponderStandardEditActions.copy(_:)) {
      return true
    }
    return false
  }
}

我只是在 webview 中加载一个网页。你可以只添加这个扩展，其余的应该可以工作:)。