我正在创建一个具有自定义UIMenuItem的iOS应用。在WKWebView中选择文本时,将显示此新的自定义UIMenuItem。如何获取所选文本。
我按照https://stackoverflow.com/a/49761522/6828076中的说明创建了一个自定义UIMenuItem。它工作正常,但是我需要点击自定义UIMenuItem时使用的选定文本。关于使用UIPasteboard的文章很多,但是自定义项不会将所选文本复制到UIPasteboard中,因此我无法检索到它。
func setupCustomMenu() {
let customMenuItem = UIMenuItem(title: "Foo", action:
#selector(ViewController.transelateMenuTapped))
UIMenuController.shared.menuItems = [customMenuItem]
UIMenuController.shared.update()
}
@objc func transelateMenuTapped() {
let yay = //Need to retrieve the selected text here
let alertView = UIAlertController(title: "Yay!!", message: yay, preferredStyle: .alert)
alertView.addAction(UIAlertAction(title: "cool", style: .default, handler: nil))
present(alertView, animated: true, completion: nil)
}
答案 0 :(得分:0)
您可以为此使用Javascript。
以下是您使用的答案中的代码,通过在WKWebView上评估Javascript,对其进行了稍微改动以获取所选文本:
import UIKit
import WebKit
class ViewController: UIViewController {
weak var webView: CustomMenuWebView!
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
prepareWebView()
}
@objc func translateMenuTapped(_ test: Any) {
webView.evaluateJavaScript("window.getSelection().toString()") { (test, error) in
guard let test = test as? String, error == nil else { return }
// ***** Here's the user's selected text *****
print(test)
}
}
}
private extension ViewController {
func prepareWebView() {
addWebViewToView()
loadWebViewContent()
setupCustomMenu()
}
func addWebViewToView() {
let webView = CustomMenuWebView(
frame: view.bounds, configuration: WKWebViewConfiguration())
view.addSubview(webView)
self.webView = webView
}
func loadWebViewContent() {
let url = URL(string: "https://www.google.com")
let request = URLRequest(url: url!)
webView.load(request)
}
func setupCustomMenu() {
let customMenuItem = UIMenuItem(
title: "Translate", action: #selector(ViewController.translateMenuTapped))
UIMenuController.shared.menuItems = [ customMenuItem ]
UIMenuController.shared.update()
}
}
class CustomMenuWebView: WKWebView {
// Turn off all other menu items
override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
return false
}
}