Angularjs 带有typescript的AngulaJS无法访问指令链接函数中的AngulaJS服务

我对typescript非常陌生，我正在尝试创建使用typescript类编写的Angular.js指令，并希望在指令link函数中使用外部Angular服务，该函数在$watch函数接收数据时调用。但无论我如何尝试，这个关键字总是链接到全局窗口，我无法访问注入的服务。请帮我做这件事。 这是我的指示：

module Portal.MainMenu {
    class MenuScrollDirective implements ng.IDirective {
        static $inject = ["$timeout", "$window"];

        constructor(private $timeout: ng.ITimeoutService, private $window: ng.IWindowService) { } 
        restrict = "EA";
        scope = {
            expanded: "=",
            tplChanged: "=",
            fullView: "="
        };
        link = ($scope: ng.IScope, el: IJQSlimScroll) => {
            var settings = {
                position: 'left',
                size: '5px'
            };

            init();

            function init() {
                $scope.$watch('expanded',(cur, prev) => {
                    cur && adjustScroll();
                });
            }

            function adjustScroll() {
                var winH = this.$window.innerHeight //this - refers to Window here 
                                                   //but I need to access service

                this.$timeout(() => {
                    //need access to el here
                }); //same here 'this' is global 
            }
    }

    angular.module('portal.mainMenu')
           .directive('menuScroll', ($timeout: ng.ITimeoutService, $window: ng.IWindowService) => {
                return new MenuScrollDirective($timeout, $window);
            });
}

---

我不习惯打字，但我觉得这不像惯用的打字。你可能想要这样的东西：

class MenuScrollDirective implements ng.IDirective {
    static $inject = ["$timeout", "$window"];

    constructor(private $timeout: ng.ITimeoutService, private $window: ng.IWindowService) { 
        this.restrict = "EA";
        this.scope = {
            expanded: "=",
            tplChanged: "=",
            fullView: "="
        };
    } 

    link($scope: ng.IScope, el: IJQSlimScroll) {
        $scope.$watch('expanded', (cur, prev) => {
            cur && this.adjustScroll();
        });
    }

    private adjustScroll() {
        var winH = this.$window.innerHeight;
        this.$timeout(() => {}); 
    }
}

link = ($scope: angular.IScope, el: angular.IAugmentedJQuery, ctrl: Function, attrs: angular.IAttributes).

---

指令链接函数的第三个参数是controller/ctrl，第四个参数是attributes/attrs

示例链接函数如下所示：

class MenuScrollDirective implements ng.IDirective {
    static $inject = ["$timeout", "$window"];

    constructor(private $timeout: ng.ITimeoutService, private $window: ng.IWindowService) { 
        this.restrict = "EA";
        this.scope = {
            expanded: "=",
            tplChanged: "=",
            fullView: "="
        };
    } 

    link($scope: ng.IScope, el: IJQSlimScroll) {
        $scope.$watch('expanded', (cur, prev) => {
            cur && this.adjustScroll();
        });
    }

    private adjustScroll() {
        var winH = this.$window.innerHeight;
        this.$timeout(() => {}); 
    }
}

link = ($scope: angular.IScope, el: angular.IAugmentedJQuery, ctrl: Function, attrs: angular.IAttributes).

您可以使用控制器引用来调用控制器函数，并从中直接调用操作所需的angular services函数

问候

---

Ajay

可能吧，但是我在link函数中使用el:IJQSlimScroll进行了很多DOM操作，在这种情况下我应该怎么做？以某种方式传递元素作为对adjustScroll函数的引用？是的，对我来说这听起来是最干净的事情。