I'm trying to make my javascript interact with swift code but unfortunately i didn't succeed.
For the moment, i just tried to change the headers colors and display a message like you will see in the code below.
Here's my (index.html) code:
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
<meta charset="UTF-8">
</head>
<body>
<h1>WebView Test</h1>
<script type="text/javascript" src="main.js"></script>
</body>
</html>
Here's my (main.js -JavaScript) code:
function callNativeApp () {
try {
webkit.messageHandlers.callbackHandler.postMessage("Send from JavaScript");
} catch(err) {
console.log('error');
}
}
setTimeout(function () {
callNativeApp();
}, 5000);
function redHeader() {
document.querySelector('h1').style.color = "red";
}
Here's my (ViewController.swift) code:
import UIKit
import WebKit
class ViewController: UIViewController, WKScriptMessageHandler {
@IBOutlet var containerView : UIView! = nil
var webView: WKWebView?
override func loadView() {
super.loadView()
var contentController = WKUserContentController();
var userScript = WKUserScript(
source: "redHeader()",
injectionTime: WKUserScriptInjectionTime.AtDocumentEnd,
forMainFrameOnly: true
)
contentController.addUserScript(userScript)
contentController.addScriptMessageHandler(
self,
name: "callbackHandler"
)
var config = WKWebViewConfiguration()
config.userContentController = contentController
self.webView = WKWebView()
self.view = self.webView!
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
var url = NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("index", ofType: "html")!)
var req = NSURLRequest(URL: url)
self.webView!.loadRequest(req)
}
func userContentController(userContentController: WKUserContentController!,didReceiveScriptMessage message: WKScriptMessage!) {
if(message.name == "callbackHandler") {
println("JavaScript is sending a message (message.body)")
} }
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
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