本文介绍WKWebView怎么与js交互，至于怎么用WKWebView这里就不介绍了
html代码
<html>
<meta charset="UTF-8">
<head>
<title>
H5测试
</title>
</head>
<body>
<h1 align="center">标题1（App调用Js使标题变成红色）</h1>
<script>
//js调用APP-传单个参数
function callNativeApp(){
try{
webkit.messageHandlers.callbackHandle.postMessage("Hello World")
}catch(error){
console.error('The native context not exist ')
}
}
//js调用APP-传多个参数
function callNativeApp2(){
try{
webkit.messageHandlers.callbackHandle2.postMessage({key: "Hello", value: "World"})
}catch(error){
console.error('The native context not exist ')
}
}
//APP调用js
function changeHead(){
document.querySelector('h1').style.color = "red"
}
</script>
<button style="text-align:center;height:50px;width:200px;font-size:16px" onclick="callNativeApp()">调用APP（单个参数）</button>
<button style="text-align:center;height:50px;width:220px;font-size:16px" onclick="callNativeApp2()">调用APP（多个个参数）</button>
</body>
</html>
APP调JS
- 代码
//调用js
webView.evaluateJavaScript("changeHead()", completionHandler: {
(any, error) in
if (error != nil) {
Log.error("\(error)")
}
})
- 结果
result1.png
JS给APP传参数
- 首先注册你需要监听的js方法名
//监听js
webView.configuration.userContentController.add(self, name: "callbackHandle")
webView.configuration.userContentController.add(self, name: "callbackHandle2")
- 2.继承WKScriptMessageHandler 并重写userContentController方法,在该方法里接收JS传来的参数
@available(iOS 8.0, *)
func userContentController(_ userContentController: WKUserContentController,
didReceive message: WKScriptMessage) {
switch message.name {
case "callbackHandle":
//单个参数
Log.info("\(message.body)")
case "callbackHandle2":
//多个参数
if let dic = message.body as? NSDictionary {
let key: String = (dic["key"] as AnyObject).description
let value: String = (dic["value"] as AnyObject).description
Log.info("key: \(key)")
Log.info("value: \(value)")
}
default: break
}
}
- 3.结果
result.png
