为什么不显示我的 UIScrollView 中的 WKWebview？

Question

我需要在 UIScrollView 的内容视图中添加一个 WKWebview 来加载网页内容。

我正在使用 Apple 代码加载网页，我的插座 viewForWebview 已正确链接，并且已调用 didFinish。

class ViewController: UIViewController, WKUIDelegate, WKNavigationDelegate {

    var webView: WKWebView!
    @IBOutlet var viewForWebview: UIView!

    override func loadView() {
        super.loadView()
        let myConfiguration = WKWebViewConfiguration()
        webView = WKWebView(frame: .zero, configuration: myConfiguration)
        webView.uiDelegate = self
        webView.navigationDelegate = self
        viewForWebview = webView
    }

    override func viewDidLoad() {
        super.viewDidLoad()

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

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        print("Finished navigating to url \(String(describing: webView.url))")
    }

    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        print(error)
    }
}

但是我的 WKWebview 是空白的：

只是为了测试，我尝试在滚动视图的内容视图中直接显示 WKWebview，它起作用了。

为什么它不能用作内容的子视图？

Answer 1

不要为此类操作覆盖 loadView，您需要

class ViewController: UIViewController, WKUIDelegate, WKNavigationDelegate {

    var webView: WKWebView!
    @IBOutlet var viewForWebview: UIView!


    override func viewDidLoad() {
        super.viewDidLoad()


        let myConfiguration = WKWebViewConfiguration()
        webView = WKWebView(frame:.zero, configuration: myConfiguration)
        webView.uiDelegate = self
        webView.navigationDelegate = self
        viewForWebview.addSubview(webView)
        webView.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            webView.topAnchor.constraint(equalTo: viewForWebview.topAnchor),
            webView.bottomAnchor.constraint(equalTo: viewForWebview.bottomAnchor),
            webView.leadingAnchor.constraint(equalTo: viewForWebview.leadingAnchor),
            webView.trailingAnchor.constraint(equalTo: viewForWebview.trailingAnchor)

        ])

        let url = URL(string: "https://www.apple.com")
        let request = URLRequest(url: url!)
        webView.load(request)
    }

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        print("Finished navigating to url \(String(describing: webView.url))")
    }

    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        print(error)
    }
}

为什么不显示我的 UIScrollView 中的 WKWebview？

Why my WKWebview inside my UIScrollView is not displayed?

loading

uiscrollview

ios

swift

wkwebview