向多个Web视图添加后退/前进/刷新按钮

Question

我熟悉将导航按钮添加到单个Web视图中，但是在这种情况下，我试图使用相同的按钮将导航按钮添加到多个Web视图中。 Web视图位于滚动视图内部，用户可以向左或向右滑动来访问它们。我不知道如何检查用户所在的Webview的状态并相应地对按钮进行编码。

func loadWebsites() -> [Website] {
    let url1 = URL(string: "\(nikeWebsite)")
    let request1 = URLRequest(url: url1!)
    let url2 = URL(string: "\(finishlineWebsite)")
    let request2 = URLRequest(url: url2!)
    let url3 = URL(string: "\(eastbayWebsite)")
    let request3 = URLRequest(url: url3!)
    let url4 = URL(string: "\(footlockerWebsite)")
    let request4 = URLRequest(url: url4!)
    let url5 = URL(string: "\(footactionWebsite)")
    let request5 = URLRequest(url: url5!)
    let url6 = URL(string: "\(champsWebsite)")
    let request6 = URLRequest(url: url6!)


    let website1:Website = Bundle.main.loadNibNamed("Website", owner: self, options: nil)?.first as! Website
    website1.webView.load(request1)
    website1.webView.navigationDelegate = self

    let website2:Website = Bundle.main.loadNibNamed("Website", owner: self, options: nil)?.first as! Website
    website2.webView.load(request2)
    website2.webView.navigationDelegate = self

    let website3:Website = Bundle.main.loadNibNamed("Website", owner: self, options: nil)?.first as! Website
    website3.webView.load(request3)
    website3.webView.navigationDelegate = self

    let website4:Website = Bundle.main.loadNibNamed("Website", owner: self, options: nil)?.first as! Website
    website4.webView.load(request4)
    website4.webView.navigationDelegate = self

    let website5:Website = Bundle.main.loadNibNamed("Website", owner: self, options: nil)?.first as! Website
    website5.webView.load(request5)
    website5.webView.navigationDelegate = self

    let website6:Website = Bundle.main.loadNibNamed("Website", owner: self, options: nil)?.first as! Website
    website6.webView.load(request6)
    website6.webView.navigationDelegate = self


    return [website1, website2, website3, website4, website5, website6]
}

func setupWebsiteScrollView(websites : [Website]) {
    scrollView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height)
    scrollView.contentSize = CGSize(width: view.frame.width * CGFloat(websites.count), height: view.frame.height)
    scrollView.isPagingEnabled = true
    scrollView.contentInsetAdjustmentBehavior = .never

    for i in 0 ..< websites.count {
        websites[i].frame = CGRect(x: view.frame.width * CGFloat(i), y: 0, width: view.frame.width, height: view.frame.height)
        scrollView.addSubview(websites[i])
    }
}

@IBAction func backButtonTapped(_ sender: Any) {
    //go backward on webview that is currently being displayed to user
}

@IBAction func forwardButtonTapped(_ sender: Any) {
    //go forward on webview that is currently being displayed to user
}

@IBAction func refreshButtonTapped(_ sender: Any) {
    //refresh webview that is currently being displayed to user
}