vs2017 ios使用历程

Posted 2020-11-09 第一序列

1. 
   UIView的使用。
   加载本地html的方法：
   

   var context = (JSContext)WebView.ValueForKeyPath((NSString)"documentView.webView.mainFrame.javascriptContext");
               context.ExceptionHandler = (JSContext context2, JSValue exception) =>
               {
                   Console.WriteLine("JS exception: {0}", exception);
               };
               //可以使用 js调用 c# 代码，和安卓一样，通过使用 myCSharpObject对象调用c#方法
               var myExporter = new MyJSExporter();
               context[(NSString)"myCSharpObject"] = JSValue.From(myExporter, context);
   
               //var nsUrl = new NSUrl("demoTest.html", false);
               //var nsRequest = NSUrlRequest.FromUrl(nsUrl);
   
   
               NSUrl url = NSBundle.MainBundle.GetUrlForResource("main", "html");
               string htmlString = NSString.FromData(NSData.FromUrl(url), NSStringEncoding.UTF8);
   
   
               WebView.LoadHtmlString(htmlString, NSBundle.MainBundle.BundleUrl);
   

   　　声明接口

   /// <summary>
           /// js调用c#代码的方法接口
           /// </summary>
           [Protocol()]
           interface IMyJSVisibleProtocol : IJSExport
           {
               [Export("myFunc")]
               int MyFunc();
   
               [Export("Arity2:With:")]
               NSObject Arity2With(NSObject arg1, NSObject arg2);
           }
   

   　　实现方法

    /// <summary>
           /// 方法实现
           /// </summary>
           class MyJSExporter : NSObject, IMyJSVisibleProtocol
           {
               public int MyFunc()
               {
                   Console.WriteLine("Called!");
                   return 42;
               }
   
               public NSObject Arity2With(NSObject arg1, NSObject arg2)
               {
                   Console.WriteLine("Arity 2 function called with " + arg1 + " " + arg2);
                   return (NSNumber)42;
               }
            }
   

   　　js调用

   <script type="text/javascript">
           function callXamObject() {
               // `myCSharpObject` injected into JS context by C# code `context [(NSString) "myCSharpObject"] = JSValue.From (...etc...`
               alert("123");
               var resultCalculatedInCSharp = myCSharpObject.myFunc();
               document.getElementById("Output").innerHTML = resultCalculatedInCSharp;
           }
   
           function callArity2Method() {
               //Note how this is mapped by [Export ("Arity2:With:")]
               var result = myCSharpObject.Arity2With("foo", "bar");
           }
       </script>
   

   　　

2. html中使用的js和css资源，生成使用 BundleResource
   

    

   3. 使用 HttpListener 调用 c#代码
   参考 xamarin     https://developer.xamarin.com/api/type/JavaScriptCore.JSContext/
   

   //Wire up listener
               listener = new HttpListener();
               listener.Prefixes.Add("http://*:1711/");
               listener.Start();
               listener.BeginGetContext(new AsyncCallback(Callback), listener);
   

   　　

   void Callback(IAsyncResult result)
           {
               //Get the listener context
               var context = listener.EndGetContext(result);
   
               //调用的方法
               string method = context.Request.QueryString["method"];
   
               var responseString = ""; //输出的内容
   
               if (method == "callCShap")
               {
                   responseString = "my return :"+ context.Request.QueryString["msg"];
               }
   
               var responseBytes = System.Text.Encoding.UTF8.GetBytes(responseString);
   
               ////Start listening for the next request
               //listener.BeginGetContext(new AsyncCallback(Callback), listener);
   
   
   
               //var response = context.Response;// CalculateResponse();
               //var responseBytes = System.Text.Encoding.UTF8.GetBytes(response);
   
               context.Response.ContentType = "text/json";
               context.Response.StatusCode = (int)HttpStatusCode.OK;
               context.Response.ContentLength64 = responseBytes.Length;
               context.Response.OutputStream.Write(responseBytes, 0, responseBytes.Length);
               context.Response.OutputStream.Close();
           }
   

   　　

   4. 无法访问网络： 一直运行不提示错误，也不进断点，只好log调试。
   

    

   解决方法：
   （1）