XcodeでValue of type 'ViewController' has no member 'timerInterrupt'のエラーが消えない

xcodetimerで
selector: #selector(self.timerInterrupt(_:))のところでValue of type 'ViewController' has no member 'timerInterrupt'のエラーが解消されません

//
// ViewController.swift
// MyTumer
//
// Created by MacOS on 2018/10/03.
// Copyright © 2018年 Swift-Beginners. All rights reserved.
//

import UIKit

class ViewController: UIViewController {
var timer : Timer?
var count = 0
let settingKey = "timer_value"

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    let settings = UserDefaults.standard
    settings.register(defaults: [settingKey:10])
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBOutlet weak var countDownLabel: UILabel!


@IBAction func settingButtonAction(_ sender: Any) {
}

@IBAction func startButtonAction(_ sender: Any) {
    // timerをアンラップしてnowTimerに代入
    if let nowTimer = timer {
        // もしタイマーが、実行中だったらスタートしない
        if nowTimer.isValid == true {
            // 何も処理しない
            return
        }
    }
    
    // タイマーをスタート
    timer = Timer.scheduledTimer(timeInterval: 1.0,
                                 target: self,
                                 **selector: #selector(self.timerInterrupt(_:)),**
                                 userInfo: nil,
                                 repeats: true)
    
}


@IBAction func stopButtonAction(_ sender: Any) {
    func displayUpdate() -> Int {
        let settings = UserDefaults.standard
        let timerValue = settings.integer(forKey: settingKey)
        let remainCount = timerValue - count
        countDownLabel.text = " 残り(remainCount)秒"
        return remainCount
        }
    
    // 経過時間の処理
    func timerInterrupt(_ timer:Timer) {
        
        // count(経過時間)に+1していく
        count += 1
        // remainCount(残り時間)が0以下のとき、タイマーを止める
        if displayUpdate() <= 0 {
            // 初期化処理
            count = 0
            // タイマー停止
            timer.invalidate()
            
        }
    }
}