JSFunction

Example

To run the example project, clone the repo, and run pod install from the Example directory first.

Requirements

Installation

JSFunction is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'JSFunction'

Author

Donghyuk Lee - [email protected]

License

JSFunction is available under the MIT license. See the LICENSE file for more info.

Use

Create a class that inherits JSFunction.

@objcMembers
final class TestScript : NSObject, JSFunction {
    
    var name: String = "test"
    
    init(name: String) {
        self.name = name
    }
    
    func message1() {
        print("\(type(of: self)).\(#function)")
    }
    
    func message2(_ text: String) {
        print("\(type(of: self)).\(#function) text = \(text)")
    }
    
    func message3(_ text1: String, _ text2: String) {
        print("\(type(of: self)).\(#function) text1=\(text1) text2=\(text2)")
    }
    
    func json(_ json: String) {
        guard let model = json.decode(type: JsonModel.self) else { return }
        print("\(type(of: self)).\(#function) name=\(model.name), age=\(model.age)")
    }
    
    struct JsonModel : Decodable {
        var name: String
        var age: Int
    }
}

add function WKUserContentController

class ViewController: UIViewController {
    
    private var webView: WKWebView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let script = TestScript(name: "test")
        
        let userContentController = WKUserContentController()
        userContentController.add(function: script)
        
        let configuration = WKWebViewConfiguration()
        configuration.userContentController = userContentController
        
        webView = WKWebView(frame: view.frame, configuration: configuration)
        view.addSubview(webView)
        
        let localFile = Bundle.main.path(forResource: "test", ofType: "html") ?? ""
        let url = URL(fileURLWithPath: localFile)
        let request = URLRequest(url: url)
        webView.load(request)
    }
}

Javascript side

<script type="text/javascript">
    function message1() {
        var message = 'message1()';
        window.webkit.messageHandlers.test.postMessage(message);
    }

    function message2() {
        var message = 'message2(My Name is DH)';
        window.webkit.messageHandlers.test.postMessage(message);
    }

    function message3() {
        var message = 'message3(My Name is DH, 29 years old)';
        window.webkit.messageHandlers.test.postMessage(message);
    }

    function json() {
        var json = '{"name": "DH", "age": 29}';
        var message = 'json(' + json + ')';
        window.webkit.messageHandlers.test.postMessage(message);
    }
</script>