需要一些提供OpaqueToken的帮助.使用Angular 2 beta-12.如果提供者密钥是字符串,它可以正常工作,但在使用OpaqueToken时不起作用.在Child类中,SF未定义.
家长班：
export let SF = new OpaqueToken('sf');
export class A {
testMsg: string = 'hello';
}
@Component({
template: `<child></child>`,providers: [
provide(SF,{useValue: A}),provide('justString',{useValue: 'hi'})
]
})
export class App {}
儿童班：
import {Component,Injector,Inject,OpaqueToken} from 'angular2/core'
import {SF,A} from './app'
console.log("******",SF); // undefined
@Component({
selector: 'child',template: `
$$CHILD Rendered$${{a}}
`
})
export class Child {
//constructor(@Inject(SF) private a: A) {} // doesn't work
constructor(@Inject('justString') private a: string) {}
}
我得到的例外情况：
angular2.min.js:17EXCEPTION: Cannot resolve all parameters for ‘Child'(@Inject(undefined)). Make sure that all the parameters are decorated with Inject or have valid type annotations and that ‘Child’ is decorated with Injectable.
