如何在不更改导航栏标题的情况下在Ionic v1中更改页面标题？

.controller('MyController', function($scope, $ionicNavBarDelegate) {
  // 控制器代码
});

.controller('MyController', function($scope, $ionicNavBarDelegate) {
  $scope.changeTitle = function() {
    $ionicNavBarDelegate.title('新的页面标题', false);
  };
});

<ion-view>
  <ion-nav-bar>
    <ion-nav-buttons side="left">
      <button class="button" ng-click="changeTitle()">更改标题</button>
    </ion-nav-buttons>
  </ion-nav-bar>
  <ion-content>
    <!-- 内容 -->
  </ion-content>
</ion-view>