ios - swift:如何在单击按钮上对所有单元格进行 TTS

Question

我在多个单元格的 UITableViewCell 中有一个 UITextView:单击 UIButton 时，需要所有单元格 textView 的文本才能将表单文本转换为语音 (TTS)。UIButton 在 UITableViewCell 中。现在所有单元格的 TextView 的文本都不会在单击按钮时从文本转换为语音。只有一个 textView 的文本在单击按钮时被转换

UITableViewCell

class HomeTableViewCell: UITableViewCell {

  var homeViewCon: HomeTableViewController?
  let synth = AVSpeechSynthesizer()

  @IBAction func ttsBtnClick(_ sender: Any) {

    guard let ttsBtnCheck = sender as? UIButton else {
        return
    }

    if ttsBtnCheck.isSelected {
        ttsBtn.setImage(UIImage(named: "tts"), for: .normal)
        ttsBtnCheck.isSelected = false
        synth.stopSpeaking(at: AVSpeechBoundary.immediate)
    } else{
        print("ttsBtnClick false ")
        ttsBtn.setImage(UIImage(named: "ttsBlue"), for: .selected)
        ttsBtnCheck.isSelected = true

        textToSpeech()

        let point = (sender as AnyObject).convert(CGPoint.zero, to: self.homeViewCon?.homeTableView)
        let indexPath = self.homeViewCon?.homeTableView.indexPathForRow(at: point)!

        let indexPathRow  = indexPath?.row ?? 0
        let indexPathSection = self.homeViewCon?.homeTableView.numberOfRows(inSection: (indexPath?.section)!)

        if indexPathRow < indexPathSection! {
            let newIndexPath = NSIndexPath(row:(indexPath?.row)! + 1, section:(indexPath?.section)!)
            self.homeViewCon?.homeTableView.scrollToRow(
                at: newIndexPath as IndexPath, at:.bottom, animated: true)
        }
    }

}


func textToSpeech(){


    let name: String = newsTextView.text
    let endIndex = name.index(name.endIndex, offsetBy: -3)
    let truncated = name.substring(to: endIndex)



    let index2 = truncated.range(of: ".", options: .backwards)?.lowerBound

    var substring3 = index2.map(truncated.substring(to:))


    let utterance = AVSpeechUtterance(string: titleLabel.text!+". "+substring3!)

    utterance.voice = AVSpeechSynthesisVoice(language: "en-US")


    synth.speak(utterance)

}
}

Answer 1

请找到工作解决方案以及 Storyboard UI。

swift 4

    //
    //  TableViewVC.swift
    //
    //  Created by Test User on 06/02/18.
    //  Copyright © 2018. All rights reserved.
    //

    import UIKit
    import AVFoundation

    class customCell: UITableViewCell {

        @IBOutlet weak var lblTTS: UILabel!
        @IBOutlet weak var btnTTS: UIButton!

        override func awakeFromNib() {
            super.awakeFromNib()
        }

        override func setSelected(_ selected: Bool, animated: Bool) {
            super.setSelected(selected, animated: animated)
        }
    }

    class TableViewVC: UIViewController {

        @IBOutlet weak var tblTTS: UITableView!


        var arrTTS = [
            "This is first text",
            "This is second text",
            "This is third text",
            "This is fourth text",
            "This is fifth text",
            "This is sixth text",
            "This is seventh text",
            "This is eighth text",
            "This is ninth text",
            "This is tenth text",
            "This is eleventh text",
            "This is twelfth text",
        ]

        let speechSynthesizer                       = AVSpeechSynthesizer()
        var previousSelectedIndexPath              : IndexPath?


        override func viewDidLoad() {
            super.viewDidLoad()
            speechSynthesizer.delegate = self
        }

        override func didReceiveMemoryWarning() {
            super.didReceiveMemoryWarning()
        }

        @IBAction func btnTTSClicked(sender: UIButton) {

            let point = sender.convert(CGPoint.zero, to: self.tblTTS)
            let indexPath = self.tblTTS.indexPathForRow(at: point)

            if previousSelectedIndexPath == indexPath {

                let cell = self.tblTTS.cellForRow(at: indexPath!) as! customCell
                speechSynthesizer.stopSpeaking(at: .immediate)
                cell.btnTTS.setTitle("TTS", for: .normal)
                previousSelectedIndexPath = nil

            } else {

                if previousSelectedIndexPath == nil {

                    previousSelectedIndexPath = indexPath

                    let cell = self.tblTTS.cellForRow(at: indexPath!) as! customCell
                    cell.btnTTS.setTitle("Speaking", for: .normal)

                    if speechSynthesizer.isSpeaking {

                        speechSynthesizer.stopSpeaking(at: .immediate)

                    } else {

                        let speechUtterance = AVSpeechUtterance(string: self.arrTTS[indexPath!.row])

                        DispatchQueue.main.async {
                            self.speechSynthesizer.speak(speechUtterance)
                        }
                    }

                } else {

                    let oldCell = self.tblTTS.cellForRow(at: previousSelectedIndexPath!) as! customCell
                    oldCell.btnTTS.setTitle("TTS", for: .normal)

                    let cell = self.tblTTS.cellForRow(at: indexPath!) as! customCell
                    cell.btnTTS.setTitle("Speaking", for: .normal)

                    previousSelectedIndexPath = indexPath

                    if speechSynthesizer.isSpeaking {

                        speechSynthesizer.stopSpeaking(at: .immediate)

                    } else {

                        let speechUtterance = AVSpeechUtterance(string: self.arrTTS[indexPath!.row])

                        DispatchQueue.main.async {
                            self.speechSynthesizer.speak(speechUtterance)
                        }
                    }

                }
            }
        }
    }

    extension TableViewVC: UITableViewDataSource, UITableViewDelegate {

        func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
            return arrTTS.count
        }

        //----------------------------------------------------------------

        func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

            let cell = tableView.dequeueReusableCell(withIdentifier: "customCell") as! customCell

            cell.lblTTS.text = self.arrTTS[indexPath.row]
            cell.btnTTS.addTarget(self, action: #selector(btnTTSClicked(sender:)), for: .touchUpInside)

            return cell
        }

        //----------------------------------------------------------------

        func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
            return 50
        }
    }

    extension TableViewVC: AVSpeechSynthesizerDelegate {

        func speechSynthesizer(_ synthesizer: AVSpeechSynthesizer, didFinish utterance: AVSpeechUtterance) {

            speechSynthesizer.stopSpeaking(at: .word)

            if previousSelectedIndexPath != nil {
                let speechUtterance = AVSpeechUtterance(string: self.arrTTS[previousSelectedIndexPath!.row])
                DispatchQueue.main.async {
                    self.speechSynthesizer.speak(speechUtterance)
                }
            }
        }
    }