加载网页时执行javascript代码
let mWebView = WKWebView.init(frame: self.view.bounds)
self.view.addSubview(mWebView)
//加载请求
let request = NSURLRequest.init(URL: NSURL.init(string: "http://www.baidu.com/")!)
mWebView.loadRequest(request)
//编写javascript代码，并在加载网页时执行
let js1 = "var button = document.getElementsByTagName(‘button‘)[0];"
let js2 = "button.parentNode.removeChild(button);"
let js=js1+js2</span>
let script = WKUserScript(source: js, injectionTime: WKUserScriptInjectionTime.AtDocumentEnd, forMainFrameOnly: true)
mWebView.configuration.userContentController.addUserScript(script)
我自己写了个简单的html网页，作为测试用，文件名为test
<html>
<head>
<meta charset="utf-8">
<title>测试网页</title>
<style type="text/css">
body button{
color: red;
background-color: blue;
width: 200px;
}
.list{
background-color: #ffff00;
}
</style>
</head>
<body>
<br>
<br>
<br>
<P>
</P>
<ul >
</ul>
<br>
<button onclick="window.webkit.messageHandlers.YX.postMessage(‘专注探索‘)">按钮1</button>
<button>按钮2</button>
<button onclick="window.webkit.messageHandlers.{YX}.postMessage(kkkkkkkkkk)">这按钮3</button>
</body>
</html>
WKWebView获得网页传递的数据，和js进行交互
import UIKit
import WebKit
class ViewController: UIViewController ,WKScriptMessageHandler,WKUIDelegate,WKNavigationDelegate {
override func viewDidLoad() {
super.viewDidLoad()
//创建一个WKWebView，并添加到控制器的view中
let mWebView = WKWebView.init(frame: self.view.bounds)
self.view.addSubview(mWebView)
//加载请求
let url1 = NSURL.fileURLWithPath("/Users/yinqixing/Documents/0102--自己编的网页/0102--自己编的网页Tests/test.html")
// let url = NSBundle.mainBundle().URLForResource("test", withExtension: "html")
let request = NSURLRequest.init(URL: url1)
mWebView.loadRequest(request)
//编写javascript代码，并在加载网页时执行
let js1 = "var button = document.getElementsByTagName(‘button‘)[1];"
let js2 = "button.parentNode.removeChild(button);"
let js=js1+js2
let script = WKUserScript(source: js, injectionTime: WKUserScriptInjectionTime.AtDocumentEnd, forMainFrameOnly: true)
mWebView.configuration.userContentController.addUserScript(script)
mWebView.UIDelegate = self
mWebView.navigationDelegate = self
//注意 控制器要遵守WKScriptMessageHandler这个协议
//网页代码加入的交互代码： window.webkit.messageHandlers.YX.postMessage()
mWebView.configuration.userContentController.addScriptMessageHandler(self, name: "YX")
}
//实现WKScriptMessageHandler协议中的方法
func userContentController(userContentController: WKUserContentController, didReceiveScriptMessage message: WKScriptMessage) {
print(message.body)
//打印结果为 专注探索
}
时间： 2024-12-11 00:11:14