我正在向 webviewkit 注入(inject) java 脚本，让用户在长按时从网站检索图像，所以我的问题是一些网站没有响应 javascript 注入(inject)，但大多数网站都响应完美。我希望你们中的一个人也遇到过同样的问题。任何帮助表示赞赏。谢谢 ! 这是我的代码:
private func initializeWebView() {
webView.navigationDelegate = self
let newJavascript = "window.onload = function() {
if (document.addEventListener){
document.addEventListener("click", function(evt) {
var tagClicked = document.elementFromPoint(evt.pageX - window.pageXOffset, evt.pageY - window.pageYOffset);
window.webkit.messageHandlers.jsMessenger.postMessage(tagClicked.outerHTML.toString());
});
}
else if (document.attachEvent){
document.attachEvent("onclick", function(evt) {
var tagClicked = document.elementFromPoint(evt.pageX - window.pageXOffset, evt.pageY - window.pageYOffset);
window.webkit.messageHandlers.jsMessenger.postMessage(tagClicked.innerHTML.toString());
});
}
document.body.style.webkitTouchCallout='none';
document.body.style.webkitUserSelect='none';
document.body.style.pointerEvents='auto';
};"
window.onload = function() {
if (document.addEventListener){
document.addEventListener("click", function(evt) {
var tagClicked = document.elementFromPoint(evt.pageX - window.pageXOffset, evt.pageY - window.pageYOffset);
window.webkit.messageHandlers.jsMessenger.postMessage(tagClicked.outerHTML.toString());
});
}
else if (document.attachEvent){
document.attachEvent("onclick", function(evt) {
var tagClicked = document.elementFromPoint(evt.pageX - window.pageXOffset, evt.pageY - window.pageYOffset);
window.webkit.messageHandlers.jsMessenger.postMessage(tagClicked.innerHTML.toString());
});
}
document.body.style.webkitTouchCallout='none';
document.body.style.webkitUserSelect='none';
document.body.style.pointerEvents='auto';
};
let userScript = WKUserScript.init(source: newJavascript,
injectionTime: .atDocumentEnd , forMainFrameOnly: false)
webView.configuration.userContentController.addUserScript(userScript)
webView.configuration.userContentController.add(self, name: "jsMessenger")
longGesture = UILongPressGestureRecognizer(target: self, action: #selector(WebViewController.longPress(_:)))
longGesture.minimumPressDuration = 1
longGesture.delegate = self
// let clickGesture=UipresG
self.webView.scrollView.addGestureRecognizer(longGesture)
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(viewTap) )
tapGesture.delegate = self
self.webView.scrollView.addGestureRecognizer(tapGesture)
tapGesture.delegate = self
webView.addGestureRecognizer(tapGesture)
}
private func loadData() {
let request = URLRequest(url: url)
webView.load(URLRequest.init(url: url))
}
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
print(message.body)
let html: String = message.body as! String
do{
let doc: Document = try SwiftSoup.parse(html)
if(html.contains("img")){
var link: Element = try doc.select("img").first()!
contentInfo=message.body as! String
var linkHref: String = try link.attr("src")
if linkHref.contains("https://www.google.com") {
linkHref=String(linkHref.dropFirst(22))
linkHref="http:"+linkHref
} else {
linkHref = String(format: "%@%@", (self.url.absoluteString), linkHref)
}
if (linkHref.contains("https://www.google.com")) {
linkHref=String(linkHref.dropFirst(22))
if(!linkHref.contains("http")){
linkHref="http:"+linkHref
}
}
self.itemImgUrl=linkHref
}
}catch{
}
}
最佳答案
我发现了这个问题，在我的脚本“window.onload = function() {”中，有时它没有执行，因此当我删除它时，脚本不会继续执行，所有网站都接受了该脚本。 希望我的回答对某人有所帮助。干杯!
关于javascript - 一些网站不接受将 javascript 注入(inject)到 webview 中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/56632797/