在WKWebview中更改google CSS

import WebKit

let webView = WKWebView(frame: view.bounds)
view.addSubview(webView)

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

let cssString = "body { background-color: red; }" // 自定义的CSS样式
let scriptString = "var style = document.createElement('style'); style.innerHTML = '\(cssString)'; document.head.appendChild(style);"
let userScript = WKUserScript(source: scriptString, injectionTime: .atDocumentEnd, forMainFrameOnly: true)
let userContentController = WKUserContentController()
userContentController.addUserScript(userScript)
let configuration = WKWebViewConfiguration()
configuration.userContentController = userContentController
let webView = WKWebView(frame: view.bounds, configuration: configuration)
view.addSubview(webView)