如何在.factory中放置$ionicModal以使用它？

angular.module('app').factory('ModalService', function($ionicModal) {
  var modalService = {};

  // 在这里定义你的.modal的配置和方法
  // ...

  return modalService;
});

angular.module('app').factory('ModalService', function($ionicModal) {
  var modalService = {};

  modalService.openModal = function() {
    $ionicModal.fromTemplateUrl('templates/modal.html', {
      scope: null,
      animation: 'slide-in-up'
    }).then(function(modal) {
      modalService.modal = modal;
      modalService.modal.show();
    });
  };

  modalService.closeModal = function() {
    modalService.modal.hide();
    modalService.modal.remove();
  };

  return modalService;
});

angular.module('app').controller('MyController', function($scope, ModalService) {
  $scope.openModal = function() {
    ModalService.openModal();
  };
});

<button ng-click="openModal()">打开.modal</button>