swift與js互動:
先看model:

@objc protocol VideoDelegate : JSExport {
    func callSystemCamera();
    func exitsCollection(cid: String);
}
@objc class OCModel: NSObject , VideoDelegate {
    
    var jsContext: JSContext!

    
    
    func callSystemCamera() {
        
        print("callSystemCamera exe")
        
        let jsFunc = jsContext.objectForKeyedSubscript("jsFunc");
        jsFunc?.call(withArguments: []);
        
    }
    
    func exitsCollection(cid: String) {
        print("cid \(cid)");
        
        let handleFunc = jsContext.objectForKeyedSubscript(cid);
        handleFunc?.call(withArguments: ["type","1"]);
        
    }
    
    
}


class TestJSContext: NSObject {
    
    

    func testJS(){
        let jsContext = JSContext();
        jsContext?.exceptionHandler = {
            (context,value) -> Void in
            
            print("context?.exception.toString() \(String(describing: context?.exception?.toString()))");
        }
        
        let jsPath = Bundle.main.url(forResource: "js", withExtension: "js");
        let jsTxt = try? String.init(contentsOf: jsPath!);
        //    let value = jsContext?.evaluateScript("2 * 0");
        //    print("value?.toObject() \(value?.toString())");
        let csDt = jsContext?.evaluateScript(jsTxt!);
        print(csDt as Any);
        let arrayVa = jsContext?.objectForKeyedSubscript("array");
        print("arrayVa?.toArray() \(arrayVa?.toObject() ?? "")");
        
        var funcMethod = jsContext?.evaluateScript("enterHome")
        let result = funcMethod?.call(withArguments: [9])
        print("object = \(result)")
    }
}
 

注意: 必須實現 JSExport協議,

viewController:

首先載入 html 到 webView

然後 在載入完成之後 直接加入 model

有點需要注意:

是 value(forKeyPath:)不是 value(forKey:);

從webView 裡獲取 JSContext

1.     self.jsContext = webView.value(forKeyPath: "documentView.webView.mainFrame.javaScriptContext"
   ) as? JSContext