如果添加到角度材料中的对话窗口的单独文件中，则未定义控制器

Question

对话框窗口有一个单独的控制器ctrl2和功能，如果我将它作为链添加到相同的ctrl它可以工作，但将其添加到另一个文件中，以便它可以在别处使用它抛出错误

ng:areq] Argument 'ctrl2' is not a function, got undefined

案例2中的错误是什么？

案例1：在同一档案中（工作正常）

file1.ctrl.js

(function () {
    'use strict';
    angular
        .module('app.mydev.module1',[])
        .controller('ctrl1', crtl1)
        .controller('ctrl2', ctrl2);
    /* @ngInject */
    function ctrl1($scope, $mdDialog) {
        var vm = this;
        $scope.showAdvanced = function(ev) {
            $mdDialog.show({
                templateUrl: 'app/mydev/mypage.tmpl.html',
                parent: angular.element(document.body),
                controller: 'ctrl2',
                controllerAs : 'vm',
                targetEvent: ev,
                clickOutsideToClose:true,
                fullscreen: $scope.customFullscreen // Only for -xs, -sm breakpoints.
            })
                .then(function(answer) {
                    $scope.status = 'You said the information was "' + answer + '".';
                }, function() {
                    $scope.status = 'You cancelled the dialog.';
                });
        };
    }

    /* @ngInject */
    function ctrl2($scope, $mdDialog) {
        var vm = this;
        vm.user = {
            email: '',
            password: ''
        };
    }
})();

案例2：在单独的文件中（它抛出错误）

File1.ctrl.js

(function () {
    'use strict';
    angular
        .module('app.mydev.module1',[])
        .controller('ctrl1', crtl1);
    /* @ngInject */
    function ctrl1($scope, $mdDialog) {
        var vm = this;
        $scope.showAdvanced = function(ev) {
            $mdDialog.show({
                templateUrl: 'app/mydev/mypage.tmpl.html',
                parent: angular.element(document.body),
                controller: 'ctrl2',
                controllerAs : 'vm',
                targetEvent: ev,
                clickOutsideToClose:true,
                fullscreen: $scope.customFullscreen // Only for -xs, -sm breakpoints.
            })
                .then(function(answer) {
                    $scope.status = 'You said the information was "' + answer + '".';
                }, function() {
                    $scope.status = 'You cancelled the dialog.';
                });
        };
    }


})();

File2.ctrl.js

(function () {
    'use strict';
    angular
        .module('app.mydev.module1',[])
        .controller('ctrl2', ctrl2);

    /* @ngInject */
    function ctrl2($scope, $mdDialog) {
        var vm = this;
        vm.user = {
            email: '',
            password: ''
        };
    }
})();