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加载HTML的完整类如下所示：

import WebKit
class WebViewLoader: NSObject, WKNavigationDelegate {
    private let webview = WKWebView()
    private var url: URL?
    private var completion: ((String)->Void)?
    func setup(url: URL, completion: @escaping (String)->Void) {
        self.url = url
        self.completion = completion
        webview.navigationDelegate = self
        webview.load(URLRequest(url: url))
    }
    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        Timer.perform(withDelay: delay) { [weak self] in
            webView.evaluateJavaScript("document.documentElement.outerHTML.toString()") { [weak self] html, error in
                self?.completion?(html as? String ?? "")
            }
        }
    }
}

我是这样使用它的：

let loader = WebViewLoader()
let url = URL(string: "https://www.apple.com/pl")!
loader.setup(url: url) { html in
    //do anything with html
}

但这在Apple Watch上无法使用，因为watchOS上没有WebKit，有没有办法在没有WebKit的情况下获取HTML内容？

extension Timer {
    class func perform(withDelay delay: Double, closure: @escaping ()->()) {
        DispatchQueue.main.asyncAfter(deadline: .now() + delay as DispatchTime, execute: closure)
    }
}