angularjs - Angular 指令依赖注入(inject) - TypeScript

Question

似乎有很多方法可以在 TypeScript 中创建 Angular 指令。我见过的最简洁的方法是使用静态工厂函数:

module app {
    export class myDirective implements ng.IDirective {
        restrict: string = "E";
        replace: boolean = true;
        templateUrl: string = "my-directive.html";

        link: ng.IDirectiveLinkFn = (scope: ng.IScope, el: ng.IAugmentedJQuery, attrs: ng.IAttributes) => {
        };

        static factory(): ng.IDirectiveFactory {
            var directive: ng.IDirectiveFactory = () => new myDirective();
            return directive;
        }
    }

    angular.module("app")
        .directive("myDirective", myDirective.factory());
}

但如果我需要注入(inject)一些东西，我不确定该怎么做。假设我想要 $timeout:

module app {
    export class myDirective implements ng.IDirective {
        restrict: string = "E";
        replace: boolean = true;
        templateUrl: string = "my-directive.html";

        constructor(private $timeout: ng.ITimeoutService) {
        }

        link: ng.IDirectiveLinkFn = (scope: ng.IScope, el: ng.IAugmentedJQuery, attrs: ng.IAttributes) => {
            // using $timeout
             this.$timeout(function (): void {
             }, 2000);
        }

        static factory(): ng.IDirectiveFactory {
            var directive: ng.IDirectiveFactory = () => new myDirective(); // Uhoh! - What's goes here?
            directive.$inject = ["$timeout"];
            return directive;
        }
    }

    angular.module("app")
        .directive("myDirective", myDirective.factory());
}

正如您在上面看到的，我不确定如何调用 myDirective 构造函数并传入 $timeout。

Answer 1

只需将$timeout 指定为工厂构造函数参数并传递给它即可。

   static factory(): ng.IDirectiveFactory {
        var directive: ng.IDirectiveFactory = 
                       ($timeout:ng.ITimeoutService) => new myDirective($timeout); 
        directive.$inject = ["$timeout"];
        return directive;
    }