• Vue:
  openContacts:function(){
  window.nativeObj.openContacts()
  }

• android:
  Webview.addJavascriptInterface(contactsInterface, "nativeObj"); // 第二個參數 字符串隨便命名，代指java的實體類在前面Js

• ios:
  JSContext *jsContext = [self.mWebView valueForKey:@"documentView.webview.mainFrame.javaScriptContext"];
  
  jsContext[@"nativeObj"] = self;

2、android ios 調用Vue

• Vue:
  methods:{
  hwajax:function (strings) {
  this.tokenString=strings;
  }
  }
  mounted:function () {
  window.hwajax = this.hwajax;
  }

• android:
  final int version = Build.VERSION.SDK_INT;
  //因為該方法在 Android 4.4 版本才可使用，所以使用時需進行版本判斷
  String url = "javascript:window." + hwajax + "()";
  

  if (version < 18) {
  webView.loadUrl(url);
  } else {
  webView.evaluateJavascript(url, new ValueCallback<String>() {
  @Override
  public void onReceiveValue(String value) {
  //此處為 js 返回的結果
  }
  });

• ios:
  NSString jsStr = @"hwajax(‘lvkaike‘)";
  [webView evaluateJavaScript:jsStr completionHandler:^(id _Nullable d, NSError
  _Nullable error) {
  }];

android ios vue 互調