Question

我想在整個的JavaScript注入新的CSS規則排除某些網頁元素，如側邊欄，我創建在Xcode一個新的JavaScript文件與一個新的樣式標籤隱藏側邊欄我考察了谷歌Chrome瀏覽器開發工具，並使用此代碼結束：

var styleTag = document.createElement("style"); 
styleTag.textContent = '.sidebar {display:none;}'; 
document.documentElement.appendChild(styleTag); 

，創造WKWebViewConfiguration對象持有的一些屬性，允許本地代碼和託管Web內容描述here但仍然沒有之間的橋樑的創作讓這個腳本運行。

這是我的完整視圖控制器代碼：

import UIKit 
import WebKit 

class scrapedBrowser: UIViewController, WKNavigationDelegate { 

var webView: WKWebView! 
var progressView: UIProgressView! 

override func loadView() { 

    webView = WKWebView() 
    webView.navigationDelegate = self 
    view = webView 
} 

required init?(coder aDecoder: NSCoder) { 
    let config = WKWebViewConfiguration() 
    let scriptURL = Bundle.main.path(forResource: "hideSections", ofType: "js") 
    let scriptContent:String? 
    do { 
     scriptContent = try String(contentsOfFile: scriptURL!, encoding: String.Encoding.utf8) 
    } 
    catch _ { 
     scriptContent = nil 
    } 

    let script = WKUserScript(source: scriptContent!, injectionTime: .atDocumentStart, forMainFrameOnly: true) 
    config.userContentController.addUserScript(script) 
    super.init(coder: aDecoder) 
    self.webView?.navigationDelegate = self 
} 

override func viewDidLoad() { 
    super.viewDidLoad() 

    let url = URL(string: "http://yourwebsite.com/")! 
    let request = URLRequest(url: url) 
    webView.load(request) 
    webView.allowsBackForwardNavigationGestures = true 
} 

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) { 
    title = webView.title 
} 

} 

Answer 1

您需要分配config到WKWebView。

webView = WKWebView(frame: CGRect.zero, configuration: config)