angular 中注入 ActivatedRouteSnapshot 报错 "NG0204: Can't resolve all parameters for ActivatedRouteSnapshot"
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悬赏园豆：30 [已解决问题] 解决于 2025-01-11 14:04 
在 angular 19 项目的一个 Directive 实现中通过构造函数注入 ActivatedRouteSnapshot
@Directive({ selector: '[cnbLayoutSidebar]', providers: [ActivatedRouteSnapshot] }) export class LayoutSidebarDirective implements OnInit, AfterViewChecked { constructor(private readonly activatedRouteSnapshot: ActivatedRouteSnapshot) { } ngOnInit() {} ngAfterViewChecked(): void { console.log(JSON.stringify(this.activatedRouteSnapshot)); } } 运行时报错
Uncaught RuntimeError: NG0204: Can't resolve all parameters for ActivatedRouteSnapshot: (?, ?, ?, ?, ?, ?, ?, ?, ?). at getUndecoratedInjectableFactory (core.mjs:2337:11) at injectableDefOrInjectorDefFactory (core.mjs:2328:12) at providerToFactory (core.mjs:2371:48) at resolveProvider (core.mjs:31216:29) at resolveProvider (core.mjs:31209:7) at providersResolver (core.mjs:31196:5) at definition.providersResolver (core.mjs:31437:14) at initializeDirectives (core.mjs:13358:36) at resolveDirectives (core.mjs:13334:7) at templateFirstCreatePass (core.mjs:20034:3) 请问如何解决这个问题？
最佳答案
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不能直接注入 ActivatedRouteSnapshot，需要通过 ActivatedRoute
@Directive({ selector: '[cnbLayoutSidebar]' }) export class LayoutSidebarDirective implements OnInit, AfterViewChecked { private activatedRouteSnapshot: ActivatedRouteSnapshot; constructor(activatedRoute: ActivatedRoute) { this.activatedRouteSnapshot = activatedRoute.snapshot; } ngOnInit() { } ngAfterViewChecked(): void { console.log(JSON.stringify(this.activatedRouteSnapshot)); } } 