我不为什么我的问题被标记为的重复,首先,我用estaruewuateJavaScript执行JavaScript代码,因为标题标题显示了与显然不同的那个问题。更重要的是,我注意到我在问题主体结束时没有成功的情况下尝试了答案。
我使用 wkwebview.evaluateJavaScript()
funciton在swift3的wkwebview中执行javascript。但是alert()
没有打开警报对话框。而且没有错误和问题。虽然我可以使用evaluateJavaScript()
执行JavaScript代码来修改页面内容。
class WebViewController: UIViewController, WKScriptMessageHandler, WKNavigationDelegate, WKUIDelegate, UIScrollViewDelegate {
var wk:WKWebView!
self.wk.navigationDelegate = self
self.wk.uiDelegate = self
self.wk.scrollView.delegate = self
self.wk.customUserAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:53.0) Gecko/20100101 Firefox/53.0"
...
override func viewDidLoad() {
super.viewDidLoad()
...
let config = WKWebViewConfiguration()
self.wk = WKWebView(frame: CGRect(x: frame.minX, y: frame.minY+20, width: frame.width, height: frame.height-70), configuration: config)
self.wk.navigationDelegate = self
...
}
...
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
print("Finished navigation to url (String(describing: webView.url))")
//self.wk.evaluateJavaScript("document.getElementById('test').innerHTML = 'sssssssssssssss';", completionHandler: nil) //this works well
self.wk.evaluateJavaScript("alert('aaaaaaa');", completionHandler: nil) //this not show the alert dialog
}
...
}
我还参考了这篇文章并回答,而该问题不在inuatejavascript上。我为我的WebViewController
添加WKUIDelegate
并将self.wk.uiDelegate = self
添加到我的viewDidLoad()
,但没有任何更改。
添加,在Console.log((下方将日志放入控制台,而Alert((不弹出对话框。uialertController也有效。
self.wk.evaluateJavaScript("alert('aa');console.log('1234');var rect = document.getElementById('liveMovie').getBoundingClientRect();[rect.left, rect.top];") {
(result, error) -> Void in
if((result) != nil)
{
self.player?.view?.frame.origin.x = (result as! Array)[0]
self.player?.view?.frame.origin.y = (result as! Array)[1]
}
}
let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
if(true)
{
}
}))
此答案中有一个工作示例。看来您可能无法正确实现Wkuidelegate方法。
首先,您需要实现所需的wkuidelegate方法,在您的情况下,您需要实现:
optional func webView(_ webView: WKWebView,
runJavaScriptAlertPanelWithMessage message: String,
initiatedByFrame frame: WKFrameInfo,
completionHandler: @escaping () -> Void)
{
// parameter **message** will hold your actual alert message.
// Write Your Customised code to display the alert message
}
这是我的错。我对WKWebview
的经验不多。我已经有Android的XWalkview
经验,并且在那里执行alert
不需要使用Java代码实现alert
。因此,在这里,我也错过了以为我不需要用Swift实施alert
delegate
。
从 onato的答案,我了解了Swift如何执行alert
prompt
和confirm
,我丢失了这些委托的实现。因此,我指的是此答案,添加下面的实现,一切正常。
func webView(_ webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo,
completionHandler: @escaping () -> Void) {
let alertController = UIAlertController(title: nil, message: message, preferredStyle: .actionSheet)
alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
completionHandler()
}))
present(alertController, animated: true, completion: nil)
}
func webView(_ webView: WKWebView, runJavaScriptConfirmPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo,
completionHandler: @escaping (Bool) -> Void) {
let alertController = UIAlertController(title: nil, message: message, preferredStyle: .actionSheet)
alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
completionHandler(true)
}))
alertController.addAction(UIAlertAction(title: "Cancel", style: .default, handler: { (action) in
completionHandler(false)
}))
present(alertController, animated: true, completion: nil)
}
func webView(_ webView: WKWebView, runJavaScriptTextInputPanelWithPrompt prompt: String, defaultText: String?, initiatedByFrame frame: WKFrameInfo,
completionHandler: @escaping (String?) -> Void) {
let alertController = UIAlertController(title: nil, message: prompt, preferredStyle: .actionSheet)
alertController.addTextField { (textField) in
textField.text = defaultText
}
alertController.addAction(UIAlertAction(title: "OK", style: .default, handler: { (action) in
if let text = alertController.textFields?.first?.text {
completionHandler(text)
} else {
completionHandler(defaultText)
}
}))
alertController.addAction(UIAlertAction(title: "Cancel", style: .default, handler: { (action) in
completionHandler(nil)
}))
present(alertController, animated: true, completion: nil)
}