如何在AngularJS中动态更改弹出窗口标题范围变量

app.controller('MyController', function($scope) {
  $scope.title = '默认标题';
});

<div ng-controller="MyController">
  <input type="text" ng-model="title" placeholder="输入标题">
  <button ng-click="openPopup()"></button>
</div>

app.controller('MyController', function($scope, $window) {
  $scope.title = '默认标题';

  $scope.openPopup = function() {
    // 打开弹出窗口
    var popup = $window.open('', 'popup', 'width=400,height=300');

    // 更新弹出窗口的标题
    popup.document.title = $scope.title;
  };
});