如何在Angular2 Beta中使用RouteData？

Question

当我尝试RouteData使用TypeScript在Angular2 Beta中使用时,我遇到了问题.

我将它注入构造函数并正确导入它

import {RouteConfig, Router, RouteData} from 'angular2/router';

export class App {
    constructor(public router: Router, public data: RouteData) {
        // router works - routedata not
    }
}

我到了No provider for RouteData! (App -> RouteData).

如果我将它包含在这样的组件注释中

@Component({
  //..
  providers: [RouteData]
})

我收到此错误: Cannot resolve all parameters for RouteData(?). Make sure they all have valid type or annotations.

Answer 1

RouteData通过父组件中的RouteConfig为子组件提供数据.不应该在AppComponent中使用它.

要使用它,您应该在AppComponent中提供RouteConfig,如下所示:

@RouteConfig([
  {path: '/child', name: 'Child', component: ChildCmp, data: {item: 'hi there'}}
])

然后,您的ChildComponent应该注入RouteData,并且能够检索路由中的参数集,如下所示:

export class ChildCmp {
  constructor(@Inject(RouteData) private data:RouteData) {
    this.data.get("item")
  }
}