调整UIWebView中的文本大小- Swift 3

let webView = UIWebView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: view.frame.height))
view.addSubview(webView)

if let url = URL(string: "https://www.example.com") {
    let request = URLRequest(url: url)
    webView.loadRequest(request)
}

func webViewDidFinishLoad(_ webView: UIWebView) {
    // 在这里进行文本大小的调整
}

func webViewDidFinishLoad(_ webView: UIWebView) {
    let fontSize = 20 // 设置你想要的文本大小
    let javascript = "document.getElementsByTagName('body')[0].style.webkitTextSizeAdjust= '\(fontSize)%'"
    webView.stringByEvaluatingJavaScript(from: javascript)
}