如何从 AngularJS 控制器解析模块中定义的另一个控制器函数(动态 ng-controller)? [英] From an AngularJS controller, how do I resolve another controller function defined in the module (dynamic ng-controller)?

问题描述

自解释小提琴:http://jsfiddle.net/5FG2n/6/

我需要根据名称作为字符串动态选择要在运行时使用的控制器.该字符串将从配置对象中读取.

在下面的代码中，我目前将 InnerCtrlAsLocalVariable 分配给 $scope.dynamicCtrl.我如何将 InnerCtrlFromModule 分配给属性?

查看:

<div ng-controller='dynamicCtrl'>{{信息}}

JS:

var InnerCtrlAsLocalVariable = ['$scope',功能($范围){$scope.message = '从控制器作为局部变量 - 不想要'}];angular.module('app', []).controller('OuterCtrl', ['$scope',功能($范围){//而不是这样做...$scope.dynamicCtrl = InnerCtrlAsLocalVariable;//...我想做这样的事情://$scope.dynamicCtrl = resolveCtrl('InnerCtrlFromModule');}]).controller('InnerCtrlFromModule', ['$scope',功能($范围){$scope.message = '来自模块中定义的控制器 - 想要';}]);

解决方案

您可以尝试编写自定义指令:

.directive("ngDynamicController",function($compile){返回 {终端:真的，优先级:1000，链接:功能(范围，元素，属性){var controllerProperty = scope[attr.ngDynamicController];element.attr('ng-controller', controllerProperty);element.removeAttr("ng-dynamic-controller");$compile(element)(scope);}}})

如果您需要更多信息，为什么我们必须添加 terminal: true 和 priority: 1000.查看我对这个问题的回答:从 AngularJS 中的指令添加指令

演示

您可以尝试将其作为值注入:

angular.module('app', []).value('InnerCtrl',InnerCtrlAsLocalVariable).controller('OuterCtrl', ['$scope','InnerCtrl',function($scope, InnerCtrl) {//将值注入到函数中$scope.dynamicCtrl = InnerCtrl;}])

演示

或者使用 $injector 动态解析:

var InnerCtrlAsLocalVariable = ['$scope',功能($范围){$scope.message = '来自模块中定义的控制器 - 想要';}]angular.module('app', []).value('InnerCtrl',InnerCtrlAsLocalVariable).controller('OuterCtrl', ['$scope','$injector',function($scope, $injector) {//注入 $injector 服务.//动态解析值$scope.dynamicCtrl = $injector.get('InnerCtrl');}]).controller('InnerCtrlFromModule', InnerCtrlAsLocalVariable)

演示

您可以使用 $controller 服务动态创建控制器实例，我们可以从该实例中使用 constructor 属性检索构造函数

 angular.module('app', []).controller('OuterCtrl', ['$scope','$controller',功能(范围，$ 控制器){scope.dynamicCtrl = $controller('InnerCtrlFromModule',{$scope:scope.$new()}).constructor;}]).controller('InnerCtrlFromModule',['$scope', function($scope) {$scope.message = '来自模块中定义的控制器 - 想要';}])

演示

Self explanatory fiddle: http://jsfiddle.net/5FG2n/6/

I need to dynamically choose the controller to use at runtime based on its name as a string. The string will be read from a config object.

In the code below I currently have InnerCtrlAsLocalVariable assigned to $scope.dynamicCtrl. How instead do I assign InnerCtrlFromModule to the property?

View:

<div ng-app='app' ng-controller='OuterCtrl'>
    <div ng-controller='dynamicCtrl'>
        {{message}}
    </div>
</div>

JS:

var InnerCtrlAsLocalVariable = ['$scope',
    function($scope) {
        $scope.message = 'from controller as local variable - do not want'
    }
];

angular.module('app', []) 

    .controller('OuterCtrl', ['$scope', 

        function($scope) {
            // Instead of doing this...
            $scope.dynamicCtrl = InnerCtrlAsLocalVariable;

            // ...I want to do something like this:
            // $scope.dynamicCtrl = resolveCtrl('InnerCtrlFromModule');                                               
        }
    ])

    .controller('InnerCtrlFromModule', ['$scope',
        function($scope) {
            $scope.message = 'from controller defined in module - want';
        }
    ]);

解决方案

You could try writing custom directive:

.directive("ngDynamicController",function($compile){
        return {
            terminal: true, 
            priority: 1000,
            link:function(scope,element,attr){
                var controllerProperty = scope[attr.ngDynamicController];
                element.attr('ng-controller', controllerProperty);
                element.removeAttr("ng-dynamic-controller"); 
                $compile(element)(scope);
            }
        }
    })

If you need more information why we have to add terminal: true and priority: 1000. Check out my answer to this question: Add directives from directive in AngularJS

DEMO

You could try injecting it as a value:

angular.module('app', [])
        .value('InnerCtrl',InnerCtrlAsLocalVariable)
        .controller('OuterCtrl', ['$scope','InnerCtrl', 
        function($scope, InnerCtrl) { //inject the value into the function
            $scope.dynamicCtrl = InnerCtrl;                                          
        }
    ])

DEMO

Or use $injector to resolve dynamically:

var InnerCtrlAsLocalVariable = ['$scope',
            function($scope) {
                $scope.message = 'from controller defined in module - want';
            }
        ]

    angular.module('app', [])
        .value('InnerCtrl',InnerCtrlAsLocalVariable)
        .controller('OuterCtrl', ['$scope','$injector', 
            function($scope, $injector) { //inject the $injector service.

                // resolve the value dynamically
                $scope.dynamicCtrl = $injector.get('InnerCtrl');

            }
        ])

        .controller('InnerCtrlFromModule', InnerCtrlAsLocalVariable)

DEMO

You can use $controller service to create the controller instance dynamically, from that instance we can retrieve the constructor function using constructor property

 angular.module('app', [])
        .controller('OuterCtrl', ['$scope','$controller', 
            function(scope, $controller) {

                scope.dynamicCtrl = $controller('InnerCtrlFromModule',{$scope:scope.$new()}).constructor;

            }
        ])

        .controller('InnerCtrlFromModule',['$scope', function($scope) {
                $scope.message = 'from controller defined in module - want';
            }])

DEMO

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