Question

我想以编程方式生成具有特定大小的WKWebView。

这段代码是我到目前为止所得到的：

override func viewWillAppear(_ animated: Bool) {
    let webview = WKWebView()
    webview.frame  = CGRect(width: UIScreen.main.bounds.width, height: 150) // not working
    webview.load(URLRequest(url: (forResource: "index", withExtension: "html", subdirectory: "myfolder")! as URL) as URLRequest)
    webview.uiDelegate = self
    self.view.addSubview(webview)
}

但似乎并没有这样做。

错误：“无法转换类型'的值（forResource：String，withExtension：String，subirectory：String）'在强制中键入'URL'”

非常感谢任何帮助！

Answer 1

Swift 5 。创建如下所示的WKWebView类型的变量

private let webView = WKWebView(frame: .zero)

在viewDidLoad（）方法中，将webView添加到View。

      webView.translatesAutoresizingMaskIntoConstraints = false
       self.view.addSubview(self.webView)
    // You can set constant space for Left, Right, Top and Bottom Anchors
                        NSLayoutConstraint.activate([
                            self.webView.leftAnchor.constraint(equalTo: self.view.leftAnchor),
                            self.webView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor),
                            self.webView.rightAnchor.constraint(equalTo: self.view.rightAnchor),
                            self.webView.topAnchor.constraint(equalTo: self.view.topAnchor),
                            ])
        // For constant height use the below constraint and set your height constant and remove either top or bottom constraint
        //self.webView.heightAnchor.constraint(equalToConstant: 200.0),

        self.view.setNeedsLayout()
        var request = URLRequest(url: URL.init(string: "https://www.google.com"))
        self.webView.load(request)

Answer 2

我自己找到了解决方案：

此代码工作正常：

let webview = WKWebView()
    webview.frame  = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 100)
    webview.load(URLRequest(url: Bundle.main.url(forResource: "index", withExtension:"html", subdirectory: "subdirectories")! as URL) as URLRequest)
    self.view.addSubview(webview)

-

这是我失踪的那条线：

url: Bundle.main.url(forResource: "index", withExtension:"html", subdirectory: "subdirectories")! as URL)

Answer 3

    let webConfiguration = WKWebViewConfiguration()
    let startScript = Bundle(for: Background.self).url(forResource: "my_js_script", withExtension: "js")!
    let scripts =         do {
        return try String(contentsOf: startScript, encoding: .utf8)
    }
    catch {
        let message = "Could not load file at: \(startScript)"
        fatalError(message)
    }
    let script = WKUserScript(source: scripts, injectionTime: WKUserScriptInjectionTime.atDocumentStart, forMainFrameOnly: true)

    let contentController: WKUserContentController = WKUserContentController()
    contentController.addUserScript(script)

    contentController.add(self, name: "backgroundListener")
    webConfiguration.userContentController = contentController

    self._webView = WKWebView(frame: .zero, configuration: webConfiguration)
    self._webView!.customUserAgent = "my-Bridge"
    let html : String = """
                         <html>
                           <head></head>
                           <body></body>
                         </html>
                        """;
    self._webView!.loadHTMLString(html, baseURL: nil)

Swift WKWebView以编程方式

3 个答案: