在角度控制器初始化中调用dart函数

时间:2014-10-04 17:24:42

标签: angularjs dart dart-js-interop

我尝试在AngularJS控制器初始化中调用dart函数,但我得到ReferenceError: myFunction is not defined

index.dart

import 'dart:js';

myDartFunction() {
  return 42;
}

main() {
  context['myFunction'] = (JsObject exchange) {
    exchange['output'] = myDartFunction();
  };
}

我使用AngularJS的HTML:

<!DOCTYPE html>
<html ng-app="MyApp">
<head lang="en">
    <meta charset="UTF-8">
    <title>My Title</title>
</head>
<body>
    <div ng-controller="MyCtrl">
        <p>{{var}}</p>
    </div>
    <script type="application/dart" src="index.dart"></script>
    <script type="application/javascript" src="../packages/browser/dart.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.26/angular.js"></script>
    <script>
        angular.module("MyApp", []).controller('MyCtrl', function($scope) {
            var exchange = {};
            myFunction(exchange);
            $scope.var = exchange['output'];
        });
    </script>
</body>
</html>

在我看来,当控制器初始化时,context['myFunction']尚未设置。我该如何等待并初始化$scope.var

2 个答案:

答案 0 :(得分:1)

我发现,可以使用window.onload,这是在我的dart函数导出到JS后调用的。然后我使用$scope.$apply来更改我的范围变量。

angular.module("MyApp", []).controller('MyCtrl', function($scope) {
    window.onload = function () {
        $scope.$apply(function () {
            var exchange = {};
            myFunction(exchange);
            $scope.var = exchange['output'];
        });
    }
});

答案 1 :(得分:0)

我建议在创建函数后从Dart触发一个事件,并在JavaScript中执行代码作为此事件的事件处理程序。