angularjs - 无法在 Angular TypeScript 中的指令内访问自定义工厂

我已经注入了 storageService，但我尝试在 link 函数中使用 this.storageService 访问它时，它显示未定义。

有人能帮我吗？

module App.Directive {
  import Services = Core.Services;
  import Shared = Core.Shared;
  export class UserNav implements ng.IDirective {
    restrict = 'A';
    require: any = "^?ngModel";
    scope = true;
    templateUrl: any = "template/user-nav.html";
    link: ng.IDirectiveLinkFn = function(scope, element, attributes, ngModel: any) {
        var a = this.storageService.getItem("userInfo", false);
        console.log("getting > " + a);
    }
    constructor(public routerService: Services.RouterService,
        public storageService: Services.StorageService) {
    }
    static factory(): any {
        var directive = (routerService: Services.RouterService,
            storageService: Services.StorageService) => {
            return new UserNav(routerService, storageService);
        }
        directive['$inject'] = ['routerService', 'storageService'];
        return directive;
    }
  }
}

答案＃1

所以问题是链接函数更改:

module App.Directive {
  import Services = Core.Services;
  import Shared = Core.Shared;
  export class UserNav implements ng.IDirective {
    restrict = 'A';
    require: any = "^?ngModel";
    scope = true;
    templateUrl: any = "template/user-nav.html";
    link: ng.IDirectiveLinkFn = function(scope, element, attributes, ngModel: any) {
        var a = this.storageService.getItem("userInfo", false);
        console.log("getting > " + a);
    }
    constructor(public routerService: Services.RouterService,
        public storageService: Services.StorageService) {
    }
    static factory(): any {
        var directive = (routerService: Services.RouterService,
            storageService: Services.StorageService) => {
            return new UserNav(routerService, storageService);
        }
        directive['$inject'] = ['routerService', 'storageService'];
        return directive;
    }
  }
}

收件人：

module App.Directive {
  import Services = Core.Services;
  import Shared = Core.Shared;
  export class UserNav implements ng.IDirective {
    restrict = 'A';
    require: any = "^?ngModel";
    scope = true;
    templateUrl: any = "template/user-nav.html";
    link(scope, element, attributes, ngModel: any) {
        var a = this.storageService.getItem("userInfo", false);
        console.log("getting > " + a);
    }
    constructor(public routerService: Services.RouterService,
        public storageService: Services.StorageService) {
    }
    static factory(): any {
        var directive = (routerService: Services.RouterService,
            storageService: Services.StorageService) => {
            return new UserNav(routerService, storageService);
        }
        directive['$inject'] = ['routerService', 'storageService'];
        return directive;
    }
  }
}

更新：上述答案不可行。因为 link 函数是作为回调使用的，而 this 是全局对象。你必须在你的模块内部将 services 设置为一个变量，这样你才能通过作用域访问它。参见我的 fiddle