IOS webview全屏

Question

这确实是一个非常简单的问题，但我对 IOS 开发和 Swift 完全陌生。

我正在尝试添加一个 webview 并让它填满整个屏幕。

这是我的代码

 override func viewDidLoad() {
        super.viewDidLoad()

        let myWebView:UIWebView = UIWebView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))

        self.view.addSubview(myWebView)
        let url = URL (string: "https://google.com");
        let request = URLRequest(url: url! as URL);
        myWebView.loadRequest(request);
        }

当我运行应用程序时，只出现一个白屏。我可以将 html 作为字符串加载 (loadHTMLString)

所以 2 个问题

• 如何让 Web 视图获得全屏尺寸？
• 为什么我无法加载 url - 我只得到白屏

Answer 1

试试这个。

class ViewController: UIViewController , UIWebViewDelegate {

override func viewDidLoad() {
        super.viewDidLoad()


        let myWebView:UIWebView = UIWebView(frame: CGRect(x: 0, y: 20, width: self.view.frame.width, height: self.view.frame.height))
        myWebView.delegate = self
        self.view.addSubview(myWebView)
        let url = URL (string: "https://google.com");
        let request = URLRequest(url: url! as URL);
        myWebView.loadRequest(request);


    }

    func webViewDidStartLoad(_ webView: UIWebView) {
        print("web view start loading")
    }

    func webViewDidFinishLoad(_ webView: UIWebView) {
        print("web view load completely")
    }

    func webView(_ webView: UIWebView, didFailLoadWithError error: Error) {
        print("web view loading fail : ",error.localizedDescription)
    }
}

Answer 2

这是因为您还没有将myWebView 添加到view。

override func viewDidLoad() {
    super.viewDidLoad()
    let myWebView:UIWebView = UIWebView(frame: CGRect(x: 0, y: 20, width: self.view.frame.width, height: self.view.frame.height))

    self.view.addSubview(myWebView)
    let request = URLRequest(url: URL(string: "https://google.com")!)
    myWebView.loadRequest(request)
}

Answer 3

Hear is your answers of two questions

**1.How do I get the web view to get fullscreen size?**

**Ans**: let myWebView:UIWebView = UIWebView(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: self.view.frame.size.height))

**2 Why can't I load a url - I only get the white screen**
**Ans**:
        let myWebView:UIWebView = UIWebView(frame: CGRect(x: 0, y: 0, width: self.view.frame.size.width, height: self.view.frame.size.height))
        let url = URL (string: "https://google.com");
        let request = URLRequest(url: url! as URL);
        myWebView.loadRequest(request)
        self.view.addSubview(myWebView)

Load request before adding to self.view like above code

Answer 4

完成 webview 加载后，根据内容更改 webview 大小

 //MARK: - WebView Delegate Method
func webViewDidFinishLoad(_ webView: UIWebView) {
    var frame = self.webView.frame
    frame.size.height = 1
    self.webView.frame = frame
    let fittingSize = self.webView.sizeThatFits(CGSize.zero)
    frame.size = fittingSize
    self.webView.needsUpdateConstraints()
    self.webView.frame.size.height = fittingSize.height
    self.webView.scrollView.isScrollEnabled = false
}

Answer 5

我运行了您的代码，没有任何问题。

框架除外

你需要的改变 -

  let myWebView:UIWebView = UIWebView(frame: self.view.frame)

如果您无法从 url 加载，请检查您的互联网连接

webView:didFailLoadWithError

实现此功能以检查您将来遇到的任何错误

Answer 6

你已经用固定的高度和宽度初始化了 myWebView，即 300.Try

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

使用情节提要，您可以将 webView 拖放到 viewController 中并为您的视图提供约束（顶部：0，右侧：0，底部：0，左侧：0），以便您的 web 视图将显示为全屏。现在将 webView 的出口扩展到 viewController 和 viewDidLoad。

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view
    let url = URL (string: "https://www.simplifiedios.net")
    let request = URLRequest(url: URL: url!)
    webView.loadRequest(request)
}