import UIKit
import WebKit
final class ViewController: UIViewController {
@IBOutlet weak var webView: WKWebView!
override func viewDidLoad() {
super.viewDidLoad()
let userController = webView.configuration.userContentController
for handlerName in ["callbackHandler1", "callbackHandler2", "callbackHandler3"] {
userController.add(self, name: handlerName)
}
let path: String = Bundle.main.path(forResource: "index", ofType: "html")!
let localHtmlUrl: URL = URL(fileURLWithPath: path, isDirectory: false)
webView.loadFileURL(localHtmlUrl, allowingReadAccessTo: localHtmlUrl)
}
@IBAction func button1(_ sender: Any) {
// Javascriptに渡す値
let param: String = "jsCallTest1"
// Javascript側で実行する関数
let execJsFunc: String = "test1(\"\(param)\");"
webView.evaluateJavaScript(execJsFunc, completionHandler: { (object, error) -> Void in
// jsの関数実行結果
})
}
@IBAction func button2(_ sender: Any) {
let param: String = "jsCallTest2"
let execJsFunc: String = "test2(\"\(param)\");"
webView.evaluateJavaScript(execJsFunc, completionHandler: { (object, error) -> Void in })
}
@IBAction func button3(_ sender: Any) {
let param: String = "jsCallTest3"
let execJsFunc: String = "test3(\"\(param)\");"
webView.evaluateJavaScript(execJsFunc, completionHandler: { (object, error) -> Void in })
}
}
extension ViewController: WKScriptMessageHandler {
func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
if(message.name == "callbackHandler1") {
print("callbackHandler1 - \(message.body)")
}
if(message.name == "callbackHandler2") {
print("callbackHandler2 - \(message.body)")
}
if(message.name == "callbackHandler3") {
print("callbackHandler3 - \(message.body)")
}
}
}
<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" type="text/css" href="style.css">
<title>ページタイトル</title>
</head>
<body>
<h1 id="title">タイトル</h1>
<script type="text/javascript" src="js.js"></script>
</body>
</html>
function test1(val) {
var h1 = document.getElementById("title");
h1.textContent = val;
webkit.messageHandlers.callbackHandler1.postMessage(val);
}
function test2(val) {
var h1 = document.getElementById("title");
h1.textContent = val;
webkit.messageHandlers.callbackHandler2.postMessage(val);
}
function test3(val) {
var h1 = document.getElementById("title");
h1.textContent = val;
webkit.messageHandlers.callbackHandler3.postMessage(val);
}