我想使用WKWebview
API注入脚本。由于某种原因,它不起作用,我无法弄明白。我已尝试在Safari
开发者控制台中进行调试,但我无法在其中找到JavaScript
代码。
实施准则如下:
NSString *js = @"document.body.style.background = \"#FF0000\";";
NSString *myScriptSource = @"alert('Hello, World!')";
WKUserScript *s = [[WKUserScript alloc] initWithSource:myScriptSource injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:YES];
WKUserContentController *c = [[WKUserContentController alloc] init];
[c addUserScript:s];
WKWebViewConfiguration *conf = [[WKWebViewConfiguration alloc] init];
conf.userContentController = c;
WKWebView *webview = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:conf];
[self.view addSubview:webview];
webview.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
// Do any additional setup after loading the view, typically from a nib.
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://google.com"]];
[webview loadRequest:request];
});
答案 0 :(得分:2)
请使用这样的代码并添加脚本消息处理程序并设置导航委托
NSString *js = @"document.body.style.background = \"#FF0000\";";
NSString *myScriptSource = @"alert('Hello, World!')";
WKUserScript *s = [[WKUserScript alloc] initWithSource:myScriptSource injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:YES];
WKUserContentController *c = [[WKUserContentController alloc] init];
[c addUserScript:s];
// Add a script message handler for receiving "buttonClicked" event notifications posted from the JS document using window.webkit.messageHandlers.buttonClicked.postMessage script message
[c addScriptMessageHandler:self name:@"buttonClicked"];
WKWebViewConfiguration *conf = [[WKWebViewConfiguration alloc] init];
conf.userContentController = c;
WKWebView *webview = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:conf];
[self.view addSubview:webview];
webview.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
// Do any additional setup after loading the view, typically from a nib.
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://google.com"]];
[webview loadRequest:request];
});
使用方法名称
实现脚本消息处理程序“WKScriptMessageHandler”#pragma mark -WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {
if ([message.name isEqualToString:@"buttonClicked"]) {
self.buttonClicked ++;
}
// JS objects are automatically mapped to ObjC objects
id messageBody = message.body;
if ([messageBody isKindOfClass:[NSDictionary class]]) {
NSString* idOfTappedButton = messageBody[@"ButtonId"];
[self updateColorOfButtonWithId:idOfTappedButton];
}
}
并发布消息格式js,如此
var button = document.getElementById("clickMeButton");
button.addEventListener("click", function() {
var messgeToPost = {'ButtonId':'clickMeButton'};
window.webkit.messageHandlers.buttonClicked.postMessage(messgeToPost);
},false);
您将收到回电
答案 1 :(得分:2)
oauth_
默认情况下未在alert
中实施,因此即使您的用户脚本运行,也无法做任何事情。您需要实施WKWebView
:
runJavaScriptAlertPanelWithMessage
我不认为注入的JavaScript实际上出现在DOM的任何地方,它是func webView(_ webView: WKWebView, runJavaScriptAlertPanelWithMessage message: String, initiatedByFrame frame: WKFrameInfo, completionHandler: @escaping (() -> Void)) {
let alert = UIAlertController.create(title: frame.request.url?.host, message: message, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "OK", style: .default, handler: { action in
completionHandler()
}))
present(alert, animated: true, completion: nil)
}
内部的属性。